From 1b91eacb5ba2805d26004af1c4abca9d682b4a2d Mon Sep 17 00:00:00 2001
From: Myx <ludvig_olausson@hotmail.com>
Date: Mon, 27 Apr 2026 03:02:13 +0200
Subject: [PATCH] feat: Theme studio v2

---
 package-lock.json                             |  26 +
 package.json                                  |   2 +
 .../chat-messages.component.html              |  11 +-
 .../chat-messages/chat-messages.component.ts  |  34 +-
 .../chat-message-composer.component.html      |  13 +-
 .../chat-message-composer.component.ts        |  10 +-
 .../chat-message-item.component.html          |  34 +-
 .../chat-message-item.component.ts            |  65 +--
 .../chat-message-list.component.html          |  11 +-
 .../chat-message-list.component.ts            |  23 +-
 .../feature/dm-chat/dm-chat.component.html    |  21 +-
 .../feature/dm-chat/dm-chat.component.ts      |  50 +-
 .../dm-workspace/dm-workspace.component.html  |  16 +-
 .../dm-workspace/dm-workspace.component.ts    |   2 +-
 .../services/element-picker.service.ts        |   9 +-
 .../services/layout-sync.service.ts           |  43 +-
 .../services/theme.service.spec.ts            | 489 ++++++++++++++++
 .../application/services/theme.service.ts     | 238 ++++++--
 .../constants/theme-llm-guide.constants.ts    |  32 +-
 .../domain/logic/theme-defaults.logic.ts      | 230 ++------
 .../domain/logic/theme-registry.logic.ts      | 526 +++++++++++++++++-
 .../theme/domain/logic/theme-schema.logic.ts  |  36 +-
 .../domain/logic/theme-validation.logic.ts    | 133 +++--
 .../theme/domain/models/theme.model.ts        |   3 +-
 .../theme-grid-editor.component.html          |  11 +-
 .../theme-grid-editor.component.scss          |  16 +-
 .../theme-grid-editor.component.ts            |  77 ++-
 .../theme-json-code-editor.component.ts       | 228 +++++---
 .../theme-json-format.logic.spec.ts           |  24 +
 .../theme-json-format.logic.ts                |  13 +
 .../theme-settings.component.html             | 163 ++++--
 .../theme-settings.component.scss             | 106 ++++
 .../theme-settings.component.ts               | 358 +++++++++++-
 .../theme/feature/theme-node.directive.ts     |   4 +-
 .../theme-style-application.logic.spec.ts     |  56 ++
 .../feature/theme-style-application.logic.ts  |  14 +
 .../voice-controls.component.html             |  15 +-
 .../voice-controls.component.ts               |  18 +-
 .../rooms-side-panel.component.html           |  18 +-
 .../rooms-side-panel.component.ts             |  14 +-
 .../servers-rail/servers-rail.component.html  |   7 +-
 .../servers-rail/servers-rail.component.ts    | 178 +++---
 .../settings-modal.component.html             |  16 +-
 .../settings-modal.component.ts               | 123 ++--
 .../confirm-dialog.component.html             |   1 +
 .../confirm-dialog.component.ts               |   2 +
 .../context-menu/context-menu.component.html  |   1 +
 .../context-menu/context-menu.component.ts    |   2 +
 .../profile-card/profile-card.component.html  |  11 +-
 .../profile-card/profile-card.component.ts    |  77 +--
 .../screen-share-source-picker.component.html |   2 +
 .../screen-share-source-picker.component.ts   |  24 +-
 52 files changed, 2792 insertions(+), 844 deletions(-)
 create mode 100644 toju-app/src/app/domains/theme/application/services/theme.service.spec.ts
 create mode 100644 toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-format.logic.spec.ts
 create mode 100644 toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-format.logic.ts
 create mode 100644 toju-app/src/app/domains/theme/feature/theme-style-application.logic.spec.ts
 create mode 100644 toju-app/src/app/domains/theme/feature/theme-style-application.logic.ts

diff --git a/package-lock.json b/package-lock.json
index 6ef57c5..6047d28 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,8 +15,10 @@
         "@angular/platform-browser": "^21.0.0",
         "@angular/router": "^21.0.0",
         "@codemirror/commands": "^6.10.3",
+        "@codemirror/lang-css": "^6.3.1",
         "@codemirror/lang-json": "^6.0.2",
         "@codemirror/language": "^6.12.3",
+        "@codemirror/lint": "^6.9.5",
         "@codemirror/state": "^6.6.0",
         "@codemirror/theme-one-dark": "^6.1.3",
         "@codemirror/view": "^6.41.0",
@@ -2731,6 +2733,19 @@
         "@lezer/common": "^1.1.0"
       }
     },
+    "node_modules/@codemirror/lang-css": {
+      "version": "6.3.1",
+      "resolved": "https://registry.npmjs.org/@codemirror/lang-css/-/lang-css-6.3.1.tgz",
+      "integrity": "sha512-kr5fwBGiGtmz6l0LSJIbno9QrifNMUusivHbnA1H6Dmqy4HZFte3UAICix1VuKo0lMPKQr2rqB+0BkKi/S3Ejg==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/autocomplete": "^6.0.0",
+        "@codemirror/language": "^6.0.0",
+        "@codemirror/state": "^6.0.0",
+        "@lezer/common": "^1.0.2",
+        "@lezer/css": "^1.1.7"
+      }
+    },
     "node_modules/@codemirror/lang-json": {
       "version": "6.0.2",
       "resolved": "https://registry.npmjs.org/@codemirror/lang-json/-/lang-json-6.0.2.tgz",
@@ -5791,6 +5806,17 @@
       "integrity": "sha512-6YRVG9vBkaY7p1IVxL4s44n5nUnaNnGM2/AckNgYOnxTG2kWh1vR8BMxPseWPjRNpb5VtXnMpeYAEAADoRV1Iw==",
       "license": "MIT"
     },
+    "node_modules/@lezer/css": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/@lezer/css/-/css-1.3.3.tgz",
+      "integrity": "sha512-RzBo8r+/6QJeow7aPHIpGVIH59xTcJXp399820gZoMo9noQDRVpJLheIBUicYwKcsbOYoBRoLZlf2720dG/4Tg==",
+      "license": "MIT",
+      "dependencies": {
+        "@lezer/common": "^1.2.0",
+        "@lezer/highlight": "^1.0.0",
+        "@lezer/lr": "^1.3.0"
+      }
+    },
     "node_modules/@lezer/highlight": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/@lezer/highlight/-/highlight-1.2.3.tgz",
diff --git a/package.json b/package.json
index 811786a..4809d11 100644
--- a/package.json
+++ b/package.json
@@ -65,8 +65,10 @@
     "@angular/platform-browser": "^21.0.0",
     "@angular/router": "^21.0.0",
     "@codemirror/commands": "^6.10.3",
+    "@codemirror/lang-css": "^6.3.1",
     "@codemirror/lang-json": "^6.0.2",
     "@codemirror/language": "^6.12.3",
+    "@codemirror/lint": "^6.9.5",
     "@codemirror/state": "^6.6.0",
     "@codemirror/theme-one-dark": "^6.1.3",
     "@codemirror/view": "^6.41.0",
diff --git a/toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.html b/toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.html
index 7014f6d..eff42d5 100644
--- a/toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.html
+++ b/toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.html
@@ -1,4 +1,7 @@
-<div class="chat-layout relative h-full">
+<div
+  appThemeNode="chatSurface"
+  class="chat-layout relative h-full"
+>
   <app-chat-message-list
     [allMessages]="allMessages()"
     [channelMessages]="channelMessages()"
@@ -19,7 +22,10 @@
     (embedRemoved)="handleEmbedRemoved($event)"
   />
 
-  <div class="chat-bottom-bar absolute bottom-0 left-0 right-0 z-10">
+  <div
+    appThemeNode="chatComposerBar"
+    class="chat-bottom-bar absolute bottom-0 left-0 right-0 z-10"
+  >
     <app-chat-message-composer
       [replyTo]="replyTo()"
       [showKlipyGifPicker]="showKlipyGifPicker()"
@@ -47,6 +53,7 @@
 
     <div class="pointer-events-none fixed inset-0 z-[90]">
       <div
+        appThemeNode="chatGifPickerSurface"
         class="pointer-events-auto absolute w-[calc(100vw-2rem)] max-w-5xl sm:w-[34rem] md:w-[42rem] xl:w-[52rem]"
         [style.bottom.px]="composerBottomPadding() + 8"
         [style.right.px]="klipyGifPickerAnchorRight()"
diff --git a/toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.ts b/toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.ts
index 140337c..6865c81 100644
--- a/toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.ts
+++ b/toju-app/src/app/domains/chat/feature/chat-messages/chat-messages.component.ts
@@ -22,6 +22,7 @@ import {
 import { selectCurrentUser, selectIsCurrentUserAdmin } from '../../../../store/users/users.selectors';
 import { selectActiveChannelId, selectCurrentRoom } from '../../../../store/rooms/rooms.selectors';
 import { Message } from '../../../../shared-kernel';
+import { ThemeNodeDirective } from '../../../theme';
 import { ChatMessageComposerComponent } from './components/message-composer/chat-message-composer.component';
 import { KlipyGifPickerComponent } from '../klipy-gif-picker/klipy-gif-picker.component';
 import { ChatMessageListComponent } from './components/message-list/chat-message-list.component';
@@ -43,7 +44,8 @@ import {
     ChatMessageComposerComponent,
     KlipyGifPickerComponent,
     ChatMessageListComponent,
-    ChatMessageOverlaysComponent
+    ChatMessageOverlaysComponent,
+    ThemeNodeDirective
   ],
   templateUrl: './chat-messages.component.html',
   styleUrl: './chat-messages.component.scss'
@@ -70,16 +72,10 @@ export class ChatMessagesComponent {
     const channelId = this.activeChannelId();
     const roomId = this.currentRoom()?.id;
 
-    return this.allMessages().filter(
-      (message) =>
-        message.roomId === roomId &&
-        (message.channelId || 'general') === channelId
-    );
+    return this.allMessages().filter((message) => message.roomId === roomId && (message.channelId || 'general') === channelId);
   });
 
-  readonly conversationKey = computed(
-    () => `${this.currentRoom()?.id ?? 'no-room'}:${this.activeChannelId() ?? 'general'}`
-  );
+  readonly conversationKey = computed(() => `${this.currentRoom()?.id ?? 'no-room'}:${this.activeChannelId() ?? 'general'}`);
   readonly klipyEnabled = computed(() => this.klipy.isEnabled(this.currentRoom()));
   readonly composerBottomPadding = signal(140);
   readonly klipyGifPickerAnchorRight = signal(16);
@@ -176,9 +172,7 @@ export class ChatMessagesComponent {
     if (!message || !currentUserId)
       return;
 
-    const hasReacted = message.reactions.some(
-      (reaction) => reaction.emoji === event.emoji && reaction.userId === currentUserId
-    );
+    const hasReacted = message.reactions.some((reaction) => reaction.emoji === event.emoji && reaction.userId === currentUserId);
 
     if (hasReacted) {
       this.store.dispatch(
@@ -243,9 +237,7 @@ export class ChatMessagesComponent {
     const minRight = 16;
     const maxRight = Math.max(minRight, viewportWidth - popupWidth - 16);
 
-    this.klipyGifPickerAnchorRight.set(
-      Math.min(Math.max(Math.round(preferredRight), minRight), maxRight)
-    );
+    this.klipyGifPickerAnchorRight.set(Math.min(Math.max(Math.round(preferredRight), minRight), maxRight));
   }
 
   private getKlipyGifPickerWidth(viewportWidth: number): number {
@@ -290,10 +282,7 @@ export class ChatMessagesComponent {
 
       if (blob) {
         try {
-          const result = await electronApi.saveFileAs(
-            attachment.filename,
-            await this.blobToBase64(blob)
-          );
+          const result = await electronApi.saveFileAs(attachment.filename, await this.blobToBase64(blob));
 
           if (result.saved || result.cancelled)
             return;
@@ -416,12 +405,7 @@ export class ChatMessagesComponent {
 
     const message = [...this.channelMessages()]
       .reverse()
-      .find(
-        (entry) =>
-          entry.senderId === currentUserId &&
-          entry.content === content &&
-          !entry.isDeleted
-      );
+      .find((entry) => entry.senderId === currentUserId && entry.content === content && !entry.isDeleted);
 
     if (!message) {
       setTimeout(() => this.attachFilesToLastOwnMessage(content, pendingFiles), 150);
diff --git a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-composer/chat-message-composer.component.html b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-composer/chat-message-composer.component.html
index 324d41a..81e0655 100644
--- a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-composer/chat-message-composer.component.html
+++ b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-composer/chat-message-composer.component.html
@@ -1,7 +1,13 @@
 <!-- eslint-disable @angular-eslint/template/button-has-type -->
-<div #composerRoot>
+<div
+  #composerRoot
+  appThemeNode="chatComposerBar"
+>
   @if (replyTo()) {
-    <div class="pointer-events-auto flex items-center gap-2 bg-secondary/50 px-4 py-2">
+    <div
+      appThemeNode="chatComposerReplyBar"
+      class="pointer-events-auto flex items-center gap-2 bg-secondary/50 px-4 py-2"
+    >
       <ng-icon
         name="lucideReply"
         class="h-4 w-4 text-muted-foreground"
@@ -31,6 +37,7 @@
       (mouseleave)="onToolbarMouseLeave()"
     >
       <div
+        appThemeNode="chatComposerToolbar"
         class="mx-4 -mb-2 flex flex-wrap items-center justify-start gap-2 rounded-lg border border-border bg-card/70 px-2 py-1 shadow-sm backdrop-blur"
       >
         <button
@@ -124,6 +131,7 @@
 
   <div class="border-border p-4">
     <div
+      appThemeNode="chatComposerInput"
       class="chat-input-wrapper relative"
       (mouseenter)="inputHovered.set(true)"
       (mouseleave)="inputHovered.set(false)"
@@ -156,6 +164,7 @@
         }
 
         <button
+          appThemeNode="chatComposerSendButton"
           type="button"
           (click)="sendMessage()"
           [disabled]="!messageContent.trim() && pendingFiles.length === 0 && !pendingKlipyGif()"
diff --git a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-composer/chat-message-composer.component.ts b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-composer/chat-message-composer.component.ts
index 4ed2660..2513fed 100644
--- a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-composer/chat-message-composer.component.ts
+++ b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-composer/chat-message-composer.component.ts
@@ -23,6 +23,7 @@ import type { ClipboardFilePayload } from '../../../../../../core/platform/elect
 import { ElectronBridgeService } from '../../../../../../core/platform/electron/electron-bridge.service';
 import { KlipyGif, KlipyService } from '../../../../application/services/klipy.service';
 import { Message } from '../../../../../../shared-kernel';
+import { ThemeNodeDirective } from '../../../../../theme';
 import type { RoomSignalSourceInput } from '../../../../../server-directory';
 import { ChatImageProxyFallbackDirective } from '../../../chat-image-proxy-fallback.directive';
 import { TypingIndicatorComponent } from '../../../typing-indicator/typing-indicator.component';
@@ -43,7 +44,8 @@ const DEFAULT_TEXTAREA_HEIGHT = 62;
     FormsModule,
     NgIcon,
     ChatImageProxyFallbackDirective,
-    TypingIndicatorComponent
+    TypingIndicatorComponent,
+    ThemeNodeDirective
   ],
   viewProviders: [
     provideIcons({
@@ -415,11 +417,7 @@ export class ChatMessageComposerComponent implements AfterViewInit, OnDestroy {
     requestAnimationFrame(() => this.messageInputRef?.nativeElement.focus());
   }
 
-  private hasPotentialFilePayload(
-    dataTransfer: DataTransfer | null,
-    treatMissingTypesAsPotentialFile = true
-  ): boolean {
-
+  private hasPotentialFilePayload(dataTransfer: DataTransfer | null, treatMissingTypesAsPotentialFile = true): boolean {
     if (!dataTransfer)
       return false;
 
diff --git a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-item/chat-message-item.component.html b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-item/chat-message-item.component.html
index e8c99b1..983ea7c 100644
--- a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-item/chat-message-item.component.html
+++ b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-item/chat-message-item.component.html
@@ -2,11 +2,13 @@
 @let msg = message();
 @let attachmentsList = attachmentViewModels();
 <div
+  appThemeNode="chatMessageBubble"
   [attr.data-message-id]="msg.id"
   class="group relative flex gap-3 rounded-lg p-2 transition-colors hover:bg-secondary/30"
   [class.opacity-50]="msg.isDeleted"
 >
   <div
+    appThemeNode="chatMessageAvatar"
     class="flex-shrink-0 cursor-pointer"
     (click)="openSenderProfileCard($event); $event.stopPropagation()"
   >
@@ -17,7 +19,10 @@
     />
   </div>
 
-  <div class="min-w-0 flex-1">
+  <div
+    appThemeNode="chatMessageContent"
+    class="min-w-0 flex-1"
+  >
     @if (msg.replyToId) {
       @let reply = repliedMessage();
       <div
@@ -150,7 +155,10 @@
                     </div>
                   </div>
                 } @else if ((att.receivedBytes || 0) > 0) {
-                  <div class="max-w-xs rounded-md border border-border bg-secondary/40 p-3">
+                  <div
+                    appThemeNode="chatAttachmentCard"
+                    class="max-w-xs rounded-md border border-border bg-secondary/40 p-3"
+                  >
                     <div class="flex items-center gap-3">
                       <div class="flex h-10 w-10 flex-shrink-0 items-center justify-center rounded-md bg-primary/10">
                         <ng-icon
@@ -172,7 +180,10 @@
                     </div>
                   </div>
                 } @else {
-                  <div class="max-w-xs rounded-md border border-dashed border-border bg-secondary/20 p-4">
+                  <div
+                    appThemeNode="chatAttachmentCard"
+                    class="max-w-xs rounded-md border border-dashed border-border bg-secondary/20 p-4"
+                  >
                     <div class="flex items-center gap-3">
                       <div class="flex h-10 w-10 flex-shrink-0 items-center justify-center rounded-md bg-muted">
                         <ng-icon
@@ -220,7 +231,10 @@
                     />
                   }
                 } @else if ((att.receivedBytes || 0) > 0) {
-                  <div class="max-w-xl rounded-md border border-border bg-secondary/40 p-3">
+                  <div
+                    appThemeNode="chatAttachmentCard"
+                    class="max-w-xl rounded-md border border-border bg-secondary/40 p-3"
+                  >
                     <div class="flex items-start justify-between gap-3">
                       <div class="min-w-0 flex-1">
                         <div class="truncate text-sm font-medium">{{ att.filename }}</div>
@@ -247,7 +261,10 @@
                     </div>
                   </div>
                 } @else {
-                  <div class="max-w-xl rounded-md border border-dashed border-border bg-secondary/20 p-4">
+                  <div
+                    appThemeNode="chatAttachmentCard"
+                    class="max-w-xl rounded-md border border-dashed border-border bg-secondary/20 p-4"
+                  >
                     <div class="flex items-start justify-between gap-3">
                       <div class="min-w-0 flex-1">
                         <div class="truncate text-sm font-medium text-foreground">{{ att.filename }}</div>
@@ -271,7 +288,10 @@
                   </div>
                 }
               } @else {
-                <div class="rounded-md border border-border bg-secondary/40 p-2">
+                <div
+                  appThemeNode="chatAttachmentCard"
+                  class="rounded-md border border-border bg-secondary/40 p-2"
+                >
                   <div class="flex items-center justify-between">
                     <div class="min-w-0">
                       <div class="truncate text-sm font-medium">{{ att.filename }}</div>
@@ -339,6 +359,7 @@
       <div class="mt-2 flex flex-wrap gap-1">
         @for (reaction of getGroupedReactions(); track reaction.emoji) {
           <button
+            appThemeNode="chatReactionPill"
             (click)="toggleReaction(reaction.emoji)"
             class="flex items-center gap-1 rounded-full bg-secondary px-2 py-0.5 text-xs transition-colors hover:bg-secondary/80"
             [class.ring-1]="reaction.hasCurrentUser"
@@ -354,6 +375,7 @@
 
   @if (!msg.isDeleted) {
     <div
+      appThemeNode="chatMessageActions"
       class="absolute right-2 top-2 flex items-center gap-1 rounded-lg border border-border bg-card shadow-lg opacity-0 transition-opacity group-hover:opacity-100"
     >
       <div class="relative">
diff --git a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-item/chat-message-item.component.ts b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-item/chat-message-item.component.ts
index 280d501..cc25605 100644
--- a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-item/chat-message-item.component.ts
+++ b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-item/chat-message-item.component.ts
@@ -37,6 +37,7 @@ import {
   Message,
   User
 } from '../../../../../../shared-kernel';
+import { ThemeNodeDirective } from '../../../../../theme';
 
 import {
   ChatAudioPlayerComponent,
@@ -96,7 +97,8 @@ interface ChatMessageAttachmentViewModel extends Attachment {
     ChatVideoPlayerComponent,
     ChatMessageMarkdownComponent,
     ChatLinkEmbedComponent,
-    UserAvatarComponent
+    UserAvatarComponent,
+    ThemeNodeDirective
   ],
   viewProviders: [
     provideIcons({
@@ -150,15 +152,17 @@ export class ChatMessageItemComponent {
     const msg = this.message();
     const found = this.userLookup().get(msg.senderId);
 
-    return found ?? {
-      id: msg.senderId,
-      oderId: msg.senderId,
-      username: msg.senderName,
-      displayName: msg.senderName,
-      status: 'disconnected',
-      role: 'member',
-      joinedAt: 0
-    };
+    return (
+      found ?? {
+        id: msg.senderId,
+        oderId: msg.senderId,
+        username: msg.senderName,
+        displayName: msg.senderName,
+        status: 'disconnected',
+        role: 'member',
+        joinedAt: 0
+      }
+    );
   });
 
   editContent = '';
@@ -175,9 +179,7 @@ export class ChatMessageItemComponent {
   readonly attachmentViewModels = computed<ChatMessageAttachmentViewModel[]>(() => {
     void this.attachmentVersion();
 
-    return this.attachmentsSvc.getForMessage(this.message().id).map((attachment) =>
-      this.buildAttachmentViewModel(attachment)
-    );
+    return this.attachmentsSvc.getForMessage(this.message().id).map((attachment) => this.buildAttachmentViewModel(attachment));
   });
   private readonly syncAttachmentVersion = effect(() => {
     const version = this.attachmentsSvc.updated();
@@ -320,8 +322,7 @@ export class ChatMessageItemComponent {
       hour: '2-digit',
       minute: '2-digit'
     });
-    const toDay = (value: Date) =>
-      new Date(value.getFullYear(), value.getMonth(), value.getDate()).getTime();
+    const toDay = (value: Date) => new Date(value.getFullYear(), value.getMonth(), value.getDate()).getTime();
     const dayDiff = Math.round((toDay(now) - toDay(date)) / (1000 * 60 * 60 * 24));
 
     if (dayDiff === 0)
@@ -331,11 +332,7 @@ export class ChatMessageItemComponent {
       return 'Yesterday ' + time;
 
     if (dayDiff < 7) {
-      return (
-        date.toLocaleDateString([], { weekday: 'short' }) +
-        ' ' +
-        time
-      );
+      return date.toLocaleDateString([], { weekday: 'short' }) + ' ' + time;
     }
 
     return (
@@ -402,10 +399,7 @@ export class ChatMessageItemComponent {
   }
 
   requiresMediaDownloadAcceptance(attachment: Attachment): boolean {
-    return (
-      (this.isVideoAttachment(attachment) || this.isAudioAttachment(attachment)) &&
-      attachment.size > MAX_AUTO_SAVE_SIZE_BYTES
-    );
+    return (this.isVideoAttachment(attachment) || this.isAudioAttachment(attachment)) && attachment.size > MAX_AUTO_SAVE_SIZE_BYTES;
   }
 
   getMediaAttachmentStatusText(attachment: Attachment): string {
@@ -418,9 +412,7 @@ export class ChatMessageItemComponent {
         : 'Large audio file. Accept the download to play it in chat.';
     }
 
-    return this.isVideoAttachment(attachment)
-      ? 'Waiting for video source...'
-      : 'Waiting for audio source...';
+    return this.isVideoAttachment(attachment) ? 'Waiting for video source...' : 'Waiting for audio source...';
   }
 
   getMediaAttachmentActionLabel(attachment: Attachment): string {
@@ -484,8 +476,7 @@ export class ChatMessageItemComponent {
   private buildAttachmentViewModel(attachment: Attachment): ChatMessageAttachmentViewModel {
     const isVideo = this.isVideoAttachment(attachment);
     const isAudio = this.isAudioAttachment(attachment);
-    const requiresMediaDownloadAcceptance =
-      (isVideo || isAudio) && attachment.size > MAX_AUTO_SAVE_SIZE_BYTES;
+    const requiresMediaDownloadAcceptance = (isVideo || isAudio) && attachment.size > MAX_AUTO_SAVE_SIZE_BYTES;
 
     return {
       ...attachment,
@@ -493,8 +484,12 @@ export class ChatMessageItemComponent {
       isUploader: this.isUploader(attachment),
       isVideo,
       mediaActionLabel: requiresMediaDownloadAcceptance
-        ? attachment.requestError ? 'Retry download' : 'Accept download'
-        : attachment.requestError ? 'Retry' : 'Request',
+        ? attachment.requestError
+          ? 'Retry download'
+          : 'Accept download'
+        : attachment.requestError
+          ? 'Retry'
+          : 'Request',
       mediaStatusText: attachment.requestError
         ? attachment.requestError
         : requiresMediaDownloadAcceptance
@@ -504,15 +499,11 @@ export class ChatMessageItemComponent {
           : isVideo
             ? 'Waiting for video source...'
             : 'Waiting for audio source...',
-      progressPercent: attachment.size > 0
-        ? ((attachment.receivedBytes || 0) * 100) / attachment.size
-        : 0
+      progressPercent: attachment.size > 0 ? ((attachment.receivedBytes || 0) * 100) / attachment.size : 0
     };
   }
 
   private getLiveAttachment(attachmentId: string): Attachment | undefined {
-    return this.attachmentsSvc
-      .getForMessage(this.message().id)
-      .find((attachment) => attachment.id === attachmentId);
+    return this.attachmentsSvc.getForMessage(this.message().id).find((attachment) => attachment.id === attachmentId);
   }
 }
diff --git a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-list/chat-message-list.component.html b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-list/chat-message-list.component.html
index 7b05e38..672fd49 100644
--- a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-list/chat-message-list.component.html
+++ b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-list/chat-message-list.component.html
@@ -1,5 +1,6 @@
 <div
   #messagesContainer
+  appThemeNode="chatMessageList"
   class="absolute inset-0 space-y-4 overflow-y-auto p-4"
   [style.padding-bottom.px]="bottomPadding()"
   (scroll)="onScroll()"
@@ -39,7 +40,10 @@
 
     @for (message of messages(); track message.id; let index = $index) {
       @if (dateSeparatorLabels().get(index); as separatorLabel) {
-        <div class="flex items-center gap-3 py-1">
+        <div
+          appThemeNode="chatDateSeparator"
+          class="flex items-center gap-3 py-1"
+        >
           <div class="h-px flex-1 bg-border"></div>
           <span class="rounded-full border border-border bg-background/90 px-3 py-1 text-xs font-medium text-muted-foreground shadow-sm">
             {{ separatorLabel }}
@@ -70,7 +74,10 @@
 
   @if (showNewMessagesBar()) {
     <div class="pointer-events-none sticky bottom-4 flex justify-center">
-      <div class="pointer-events-auto flex items-center gap-3 rounded-lg border border-border bg-card px-3 py-2 shadow">
+      <div
+        appThemeNode="chatNewMessagesBar"
+        class="pointer-events-auto flex items-center gap-3 rounded-lg border border-border bg-card px-3 py-2 shadow"
+      >
         <span class="text-sm text-muted-foreground">New messages</span>
         <button
           type="button"
diff --git a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-list/chat-message-list.component.ts b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-list/chat-message-list.component.ts
index 9524121..c76e814 100644
--- a/toju-app/src/app/domains/chat/feature/chat-messages/components/message-list/chat-message-list.component.ts
+++ b/toju-app/src/app/domains/chat/feature/chat-messages/components/message-list/chat-message-list.component.ts
@@ -26,6 +26,7 @@ import {
   ChatMessageReplyEvent
 } from '../../models/chat-messages.model';
 import { selectAllUsers } from '../../../../../../store/users/users.selectors';
+import { ThemeNodeDirective } from '../../../../../theme';
 import { ChatMessageItemComponent } from '../message-item/chat-message-item.component';
 
 interface PrismGlobal {
@@ -41,7 +42,11 @@ declare global {
 @Component({
   selector: 'app-chat-message-list',
   standalone: true,
-  imports: [CommonModule, ChatMessageItemComponent],
+  imports: [
+    CommonModule,
+    ChatMessageItemComponent,
+    ThemeNodeDirective
+  ],
   templateUrl: './chat-message-list.component.html',
   host: {
     style: 'display: contents;'
@@ -94,9 +99,7 @@ export class ChatMessageListComponent implements AfterViewChecked, OnDestroy {
     return all.slice(all.length - limit);
   });
 
-  readonly hasMoreMessages = computed(
-    () => this.channelMessages().length > this.displayLimit()
-  );
+  readonly hasMoreMessages = computed(() => this.channelMessages().length > this.displayLimit());
 
   readonly dateSeparatorLabels = computed(() => {
     const labels = new Map<number, string>();
@@ -165,8 +168,7 @@ export class ChatMessageListComponent implements AfterViewChecked, OnDestroy {
       return;
     }
 
-    const distanceFromBottom =
-      element.scrollHeight - element.scrollTop - element.clientHeight;
+    const distanceFromBottom = element.scrollHeight - element.scrollTop - element.clientHeight;
     const newMessages = currentCount > this.lastMessageCount;
 
     if (newMessages) {
@@ -228,8 +230,7 @@ export class ChatMessageListComponent implements AfterViewChecked, OnDestroy {
     if (!element || this.isAutoScrolling)
       return;
 
-    const distanceFromBottom =
-      element.scrollHeight - element.scrollTop - element.clientHeight;
+    const distanceFromBottom = element.scrollHeight - element.scrollTop - element.clientHeight;
     const shouldStickToBottom = distanceFromBottom <= 300;
 
     if (shouldStickToBottom) {
@@ -386,11 +387,7 @@ export class ChatMessageListComponent implements AfterViewChecked, OnDestroy {
     }
 
     if (this.boundOnImageLoad && this.messagesContainer) {
-      this.messagesContainer.nativeElement.removeEventListener(
-        'load',
-        this.boundOnImageLoad,
-        true
-      );
+      this.messagesContainer.nativeElement.removeEventListener('load', this.boundOnImageLoad, true);
 
       this.boundOnImageLoad = null;
     }
diff --git a/toju-app/src/app/domains/direct-message/feature/dm-chat/dm-chat.component.html b/toju-app/src/app/domains/direct-message/feature/dm-chat/dm-chat.component.html
index da44dd4..f7e2a34 100644
--- a/toju-app/src/app/domains/direct-message/feature/dm-chat/dm-chat.component.html
+++ b/toju-app/src/app/domains/direct-message/feature/dm-chat/dm-chat.component.html
@@ -1,5 +1,11 @@
-<section class="chat-layout relative h-full bg-background">
-  <header class="flex h-14 shrink-0 items-center gap-3 border-b border-border px-4">
+<section
+  appThemeNode="dmChatSurface"
+  class="chat-layout relative h-full bg-background"
+>
+  <header
+    appThemeNode="dmChatHeader"
+    class="flex h-14 shrink-0 items-center gap-3 border-b border-border px-4"
+  >
     <app-user-avatar
       [name]="peerName()"
       [avatarUrl]="peerUser()?.avatarUrl"
@@ -14,7 +20,10 @@
   </header>
 
   @if (conversation()) {
-    <div class="absolute inset-x-0 bottom-0 top-14">
+    <div
+      appThemeNode="dmMessageRegion"
+      class="absolute inset-x-0 bottom-0 top-14"
+    >
       <app-chat-message-list
         [allMessages]="chatMessages()"
         [channelMessages]="chatMessages()"
@@ -45,7 +54,10 @@
       }
     </div>
 
-    <div class="chat-bottom-bar absolute bottom-0 left-0 right-2 z-10 bg-background/85 backdrop-blur-md">
+    <div
+      appThemeNode="chatComposerBar"
+      class="chat-bottom-bar absolute bottom-0 left-0 right-2 z-10 bg-background/85 backdrop-blur-md"
+    >
       <app-chat-message-composer
         [replyTo]="replyTo()"
         [showKlipyGifPicker]="showGifPicker()"
@@ -72,6 +84,7 @@
 
       <div class="pointer-events-none fixed inset-0 z-[90]">
         <div
+          appThemeNode="chatGifPickerSurface"
           class="pointer-events-auto absolute w-[calc(100vw-2rem)] max-w-5xl sm:w-[34rem] md:w-[42rem] xl:w-[52rem]"
           [style.bottom.px]="composerBottomPadding() + 8"
           [style.right.px]="gifPickerAnchorRight()"
diff --git a/toju-app/src/app/domains/direct-message/feature/dm-chat/dm-chat.component.ts b/toju-app/src/app/domains/direct-message/feature/dm-chat/dm-chat.component.ts
index 90265e9..1d47232 100644
--- a/toju-app/src/app/domains/direct-message/feature/dm-chat/dm-chat.component.ts
+++ b/toju-app/src/app/domains/direct-message/feature/dm-chat/dm-chat.component.ts
@@ -16,6 +16,7 @@ import { map } from 'rxjs';
 import { ElectronBridgeService } from '../../../../core/platform/electron/electron-bridge.service';
 import { UserAvatarComponent } from '../../../../shared';
 import { Attachment, AttachmentFacade } from '../../../attachment';
+import { ThemeNodeDirective } from '../../../theme';
 import { DirectMessageService } from '../../application/services/direct-message.service';
 import { selectAllUsers, selectCurrentUser } from '../../../../store/users/users.selectors';
 import {
@@ -56,6 +57,7 @@ interface DmStatusLabel {
     ChatMessageListComponent,
     ChatMessageOverlaysComponent,
     KlipyGifPickerComponent,
+    ThemeNodeDirective,
     UserAvatarComponent
   ],
   templateUrl: './dm-chat.component.html',
@@ -106,21 +108,23 @@ export class DmChatComponent {
       const knownUser = knownUsers.find((user) => user.id === participantId || user.oderId === participantId);
       const participant = conversation.participantProfiles[participantId];
 
-      return knownUser ?? {
-        id: participantId,
-        oderId: participantId,
-        username: participant?.username || participant?.displayName || participantId,
-        displayName: participant?.displayName || participant?.username || participantId,
-        description: participant?.description,
-        profileUpdatedAt: participant?.profileUpdatedAt,
-        avatarUrl: participant?.avatarUrl,
-        avatarHash: participant?.avatarHash,
-        avatarMime: participant?.avatarMime,
-        avatarUpdatedAt: participant?.avatarUpdatedAt,
-        status: 'disconnected',
-        role: 'member',
-        joinedAt: 0
-      };
+      return (
+        knownUser ?? {
+          id: participantId,
+          oderId: participantId,
+          username: participant?.username || participant?.displayName || participantId,
+          displayName: participant?.displayName || participant?.username || participantId,
+          description: participant?.description,
+          profileUpdatedAt: participant?.profileUpdatedAt,
+          avatarUrl: participant?.avatarUrl,
+          avatarHash: participant?.avatarHash,
+          avatarMime: participant?.avatarMime,
+          avatarUpdatedAt: participant?.avatarUpdatedAt,
+          status: 'disconnected',
+          role: 'member',
+          joinedAt: 0
+        }
+      );
     });
   });
   readonly messageStatuses = computed<DmStatusLabel[]>(() => {
@@ -218,14 +222,13 @@ export class DmChatComponent {
 
     const content = event.content.trim() || event.pendingFiles.map((file) => file.name).join('\n');
 
-    void this.directMessages.sendMessage(conversation.id, content, this.replyTo()?.id)
-      .then((message) => {
-        this.replyTo.set(null);
+    void this.directMessages.sendMessage(conversation.id, content, this.replyTo()?.id).then((message) => {
+      this.replyTo.set(null);
 
-        if (event.pendingFiles.length > 0) {
-          this.attachments.publishAttachments(message.id, event.pendingFiles, this.currentUserId() || undefined);
-        }
-      });
+      if (event.pendingFiles.length > 0) {
+        this.attachments.publishAttachments(message.id, event.pendingFiles, this.currentUserId() || undefined);
+      }
+    });
   }
 
   setReplyTo(message: ChatMessageReplyEvent): void {
@@ -388,8 +391,7 @@ export class DmChatComponent {
         continue;
       }
 
-      const urls = this.linkMetadata.extractUrls(message.content)
-        .filter((url) => !hasDedicatedChatEmbed(url));
+      const urls = this.linkMetadata.extractUrls(message.content).filter((url) => !hasDedicatedChatEmbed(url));
 
       if (urls.length === 0) {
         continue;
diff --git a/toju-app/src/app/domains/direct-message/feature/dm-workspace/dm-workspace.component.html b/toju-app/src/app/domains/direct-message/feature/dm-workspace/dm-workspace.component.html
index 8548593..55a1216 100644
--- a/toju-app/src/app/domains/direct-message/feature/dm-workspace/dm-workspace.component.html
+++ b/toju-app/src/app/domains/direct-message/feature/dm-workspace/dm-workspace.component.html
@@ -8,7 +8,10 @@
     [ngStyle]="listPanelStyles()"
   >
     <section class="flex h-full w-full min-w-0 flex-col">
-      <header class="flex h-14 shrink-0 items-center gap-2 border-b border-border px-3">
+      <header
+        appThemeNode="dmConversationsHeader"
+        class="flex h-14 shrink-0 items-center gap-2 border-b border-border px-3"
+      >
         <div class="grid h-8 w-8 place-items-center rounded-lg bg-secondary text-muted-foreground">
           <ng-icon
             name="lucideMessageCircle"
@@ -21,13 +24,17 @@
         </div>
       </header>
 
-      <div class="min-h-0 flex-1 overflow-y-auto p-2">
+      <div
+        appThemeNode="dmConversationList"
+        class="min-h-0 flex-1 overflow-y-auto p-2"
+      >
         @if (directMessages.conversations().length === 0) {
           <div class="flex h-full items-center justify-center px-4 text-center text-sm text-muted-foreground">No direct messages yet.</div>
         } @else {
           <div class="space-y-1">
             @for (conversation of directMessages.conversations(); track conversation.id) {
               <div
+                appThemeNode="dmConversationItem"
                 class="group flex w-full items-center gap-2 rounded-md px-2 py-2 text-left transition-colors hover:bg-secondary/60"
                 [class.bg-primary/10]="isSelectedConversation(conversation)"
                 [class.text-foreground]="isSelectedConversation(conversation)"
@@ -72,7 +79,10 @@
         }
       </div>
 
-      <div class="border-t border-border px-2 py-3">
+      <div
+        appThemeNode="dmVoiceControlsArea"
+        class="border-t border-border px-2 py-3"
+      >
         <app-voice-controls />
       </div>
     </section>
diff --git a/toju-app/src/app/domains/direct-message/feature/dm-workspace/dm-workspace.component.ts b/toju-app/src/app/domains/direct-message/feature/dm-workspace/dm-workspace.component.ts
index a9cdbcd..5305ff9 100644
--- a/toju-app/src/app/domains/direct-message/feature/dm-workspace/dm-workspace.component.ts
+++ b/toju-app/src/app/domains/direct-message/feature/dm-workspace/dm-workspace.component.ts
@@ -50,7 +50,7 @@ export class DmWorkspaceComponent implements OnDestroy {
   readonly routeConversationId = toSignal(this.route.paramMap.pipe(map((params) => params.get('conversationId'))), {
     initialValue: this.route.snapshot.paramMap.get('conversationId')
   });
-  readonly layoutStyles = computed(() => this.theme.getLayoutContainerStyles('roomLayout'));
+  readonly layoutStyles = computed(() => this.theme.getLayoutContainerStyles('dmLayout'));
   readonly listPanelStyles = computed(() => this.theme.getLayoutItemStyles('dmConversationsPanel'));
   readonly chatPanelStyles = computed(() => this.theme.getLayoutItemStyles('dmChatPanel'));
 
diff --git a/toju-app/src/app/domains/theme/application/services/element-picker.service.ts b/toju-app/src/app/domains/theme/application/services/element-picker.service.ts
index 4dd04e1..71731ff 100644
--- a/toju-app/src/app/domains/theme/application/services/element-picker.service.ts
+++ b/toju-app/src/app/domains/theme/application/services/element-picker.service.ts
@@ -59,6 +59,11 @@ export class ElementPickerService {
     this.hoveredKey.set(null);
     this.isPicking.set(false);
 
+    if (this.resumePage === 'theme') {
+      this.modal.openThemeStudio();
+      return;
+    }
+
     if (this.resumePage) {
       this.modal.open(this.resumePage);
     }
@@ -124,8 +129,6 @@ export class ElementPickerService {
     const key = themedElement?.dataset['themeKey'] ?? null;
     const definition = this.registry.getDefinition(key);
 
-    return definition?.pickerVisible
-      ? key
-      : null;
+    return definition?.pickerVisible ? key : null;
   }
 }
diff --git a/toju-app/src/app/domains/theme/application/services/layout-sync.service.ts b/toju-app/src/app/domains/theme/application/services/layout-sync.service.ts
index 192ca5e..474a7d1 100644
--- a/toju-app/src/app/domains/theme/application/services/layout-sync.service.ts
+++ b/toju-app/src/app/domains/theme/application/services/layout-sync.service.ts
@@ -9,7 +9,7 @@ import {
   ThemeGridEditorItem,
   ThemeGridRect
 } from '../../domain/models/theme.model';
-import { createDefaultThemeDocument } from '../../domain/logic/theme-defaults.logic';
+import { createDefaultThemeDocument, createDefaultThemeLayout } from '../../domain/logic/theme-defaults.logic';
 import { ThemeRegistryService } from './theme-registry.service';
 import { ThemeService } from './theme.service';
 
@@ -26,37 +26,46 @@ export class LayoutSyncService {
 
   itemsForContainer(containerKey: ThemeContainerKey): ThemeGridEditorItem[] {
     const draftTheme = this.theme.draftTheme();
-    const defaults = createDefaultThemeDocument();
+    const defaults = createDefaultThemeLayout();
 
-    return this.registry.entries()
+    return this.registry
+      .entries()
       .filter((entry) => entry.layoutEditable && entry.container === containerKey)
       .map((entry) => ({
         key: entry.key,
         label: entry.label,
         description: entry.description,
-        grid: draftTheme.layout[entry.key]?.grid ?? defaults.layout[entry.key].grid
+        grid: draftTheme.layout[entry.key]?.grid ?? defaults[entry.key].grid
       }));
   }
 
   updateGrid(key: string, grid: ThemeGridRect): void {
     this.theme.ensureLayoutEntry(key);
-    this.theme.updateStructuredDraft((draft: ReturnType<typeof createDefaultThemeDocument>) => {
-      draft.layout[key] = {
-        ...draft.layout[key],
-        grid
-      };
-    }, true, `${key} layout updated.`);
+    this.theme.updateStructuredDraft(
+      (draft: ReturnType<typeof createDefaultThemeDocument>) => {
+        draft.layout[key] = {
+          ...draft.layout[key],
+          grid
+        };
+      },
+      true,
+      `${key} layout updated.`
+    );
   }
 
   resetContainer(containerKey: ThemeContainerKey): void {
-    const defaults = createDefaultThemeDocument();
+    const defaults = createDefaultThemeLayout();
 
-    this.theme.updateStructuredDraft((draft: ReturnType<typeof createDefaultThemeDocument>) => {
-      for (const entry of this.registry.entries()) {
-        if (entry.container === containerKey && entry.layoutEditable) {
-          draft.layout[entry.key] = defaults.layout[entry.key];
+    this.theme.updateStructuredDraft(
+      (draft: ReturnType<typeof createDefaultThemeDocument>) => {
+        for (const entry of this.registry.entries()) {
+          if (entry.container === containerKey && entry.layoutEditable) {
+            draft.layout[entry.key] = defaults[entry.key];
+          }
         }
-      }
-    }, true, `${containerKey} restored to its default layout.`);
+      },
+      true,
+      `${containerKey} restored to its default layout.`
+    );
   }
 }
diff --git a/toju-app/src/app/domains/theme/application/services/theme.service.spec.ts b/toju-app/src/app/domains/theme/application/services/theme.service.spec.ts
new file mode 100644
index 0000000..16f83dc
--- /dev/null
+++ b/toju-app/src/app/domains/theme/application/services/theme.service.spec.ts
@@ -0,0 +1,489 @@
+import { DOCUMENT } from '@angular/common';
+import { EnvironmentInjector, createEnvironmentInjector } from '@angular/core';
+
+import { DEFAULT_THEME_JSON, createDefaultThemeDocument } from '../../domain/logic/theme-defaults.logic';
+import { validateThemeDocument } from '../../domain/logic/theme-validation.logic';
+import { ThemeService } from './theme.service';
+
+describe('ThemeService theme application', () => {
+  let injector: EnvironmentInjector;
+  let styleElements: TestStyleElement[];
+  let service: ThemeService;
+
+  beforeEach(() => {
+    installLocalStorageMock();
+    styleElements = [];
+    injector = createEnvironmentInjector([
+      ThemeService,
+      {
+        provide: DOCUMENT,
+        useValue: createDocumentStub(styleElements)
+      }
+    ]);
+
+    service = injector.get(ThemeService);
+    service.initialize();
+  });
+
+  afterEach(() => {
+    injector.destroy();
+    vi.unstubAllGlobals();
+  });
+
+  it('uses the compact Toju dark theme as the built-in default JSON', () => {
+    expect(JSON.parse(DEFAULT_THEME_JSON) as unknown).toEqual({
+      meta: {
+        name: 'Toju Default Dark',
+        version: '2.0.0',
+        description: 'Built-in dark glass theme for the full Toju app shell.'
+      },
+      tokens: {
+        colors: {
+          background: '224 28% 7%',
+          foreground: '210 40% 96%',
+          card: '224 25% 10%',
+          cardForeground: '210 40% 96%',
+          popover: '224 26% 9%',
+          popoverForeground: '210 40% 96%',
+          primary: '193 95% 68%',
+          primaryForeground: '222 47% 11%',
+          secondary: '223 19% 16%',
+          secondaryForeground: '210 40% 96%',
+          muted: '223 18% 14%',
+          mutedForeground: '215 20% 70%',
+          accent: '218 22% 18%',
+          accentForeground: '210 40% 98%',
+          destructive: '0 72% 55%',
+          destructiveForeground: '0 0% 100%',
+          border: '222 18% 22%',
+          input: '222 18% 22%',
+          ring: '193 95% 68%',
+          railBackground: '226 33% 8%',
+          workspaceBackground: '224 30% 9%',
+          panelBackground: '224 24% 11%',
+          panelBackgroundAlt: '222 22% 13%',
+          titleBarBackground: '226 34% 7%',
+          surfaceHighlight: '193 95% 68%',
+          surfaceHighlightAlt: '261 82% 72%'
+        },
+        spacing: {},
+        radii: {
+          radius: '0.875rem',
+          surface: '1.35rem',
+          pill: '999px'
+        },
+        effects: {
+          panelShadow: '0 24px 60px rgba(0, 0, 0, 0.42)',
+          softShadow: '0 14px 36px rgba(0, 0, 0, 0.28)',
+          glassBlur: 'blur(18px) saturate(135%)'
+        }
+      },
+      layout: {
+        serversRail: {
+          container: 'appShell',
+          grid: { x: 0, y: 0, w: 1, h: 1 }
+        },
+        appWorkspace: {
+          container: 'appShell',
+          grid: { x: 1, y: 0, w: 19, h: 1 }
+        },
+        chatRoomChannelsPanel: {
+          container: 'roomLayout',
+          grid: { x: 0, y: 0, w: 4, h: 12 }
+        },
+        chatRoomMainPanel: {
+          container: 'roomLayout',
+          grid: { x: 4, y: 0, w: 12, h: 12 }
+        },
+        chatRoomMembersPanel: {
+          container: 'roomLayout',
+          grid: { x: 16, y: 0, w: 4, h: 12 }
+        }
+      }
+    });
+  });
+
+  it('applies a JSON theme with tokens, layout, backgrounds, effects, metadata, and animations', () => {
+    const theme = createCompleteThemeDocument();
+    const loaded = service.loadThemeText(JSON.stringify(theme), 'apply', 'Theme applied.', 'complete JSON theme');
+
+    expect(loaded).toBe(true);
+    expect(service.activeThemeName()).toBe('Complete Theme Fixture');
+    expect(service.getTextOverride('titleBar')).toBe('MetoYou Lab');
+    expect(service.getIcon('titleBar')).toBe('MT');
+    expect(service.getLink('titleBar')).toBe('https://example.com/theme');
+    expect(service.getAnimationClass('titleBar')).toBe('themePulse');
+
+    expect(service.getHostStyles('appRoot')).toMatchObject({
+      '--background': '210 22% 8%',
+      '--theme-spacing-panel-gap': '14px',
+      '--radius': '1rem',
+      '--theme-radius-surface': '1.25rem',
+      '--theme-effect-glass-blur': 'blur(20px) saturate(140%)'
+    });
+
+    expect(service.getHostStyles('titleBar')).toMatchObject({
+      width: 'min(100%, 64rem)',
+      height: '4rem',
+      minWidth: '18rem',
+      minHeight: '3rem',
+      maxWidth: '72rem',
+      maxHeight: '5rem',
+      position: 'sticky',
+      top: '0',
+      right: '0',
+      bottom: 'auto',
+      left: '0',
+      padding: '0.75rem 1rem',
+      margin: '0 auto',
+      border: '1px solid hsl(var(--border) / 0.75)',
+      borderRadius: '1rem',
+      backgroundColor: 'rgba(7, 11, 20, 0.88)',
+      color: '#f8fafc',
+      backgroundImage: 'linear-gradient(90deg, rgba(14, 165, 233, 0.28), transparent), url("/themes/city.png")',
+      backgroundSize: 'cover',
+      backgroundPosition: 'center',
+      backgroundRepeat: 'no-repeat',
+      boxShadow: '0 18px 50px rgba(0, 0, 0, 0.35)',
+      backdropFilter: 'var(--theme-effect-glass-blur)',
+      opacity: '0.82'
+    });
+
+    expect(service.getLayoutContainerStyles('dmLayout')).toMatchObject({
+      display: 'grid',
+      gridTemplateColumns: 'repeat(4, 4.25rem) repeat(16, minmax(0, 1fr))'
+    });
+
+    expect(service.getLayoutItemStyles('dmChatPanel')).toMatchObject({
+      gridColumn: '7 / span 14',
+      gridRow: '2 / span 10'
+    });
+
+    const animationStylesheet = styleElements.find((styleElement) => styleElement.textContent?.includes('@keyframes themePulse'));
+
+    expect(animationStylesheet?.textContent).toContain('@keyframes themePulse');
+    expect(animationStylesheet?.textContent).toContain('animation-direction: alternate-reverse;');
+    expect(animationStylesheet?.textContent).toContain('transform: scale(1);');
+  });
+
+  it('applies raw CSS from the theme JSON', () => {
+    const loaded = service.loadThemeText(
+      JSON.stringify({
+        meta: {
+          name: 'CSS Theme',
+          version: '1.0.0'
+        },
+        css: '.theme-css-probe { color: hsl(var(--primary)); }'
+      }),
+      'apply',
+      'Theme applied.',
+      'CSS JSON theme'
+    );
+
+    expect(loaded).toBe(true);
+    expect(styleElements.some((styleElement) => styleElement.textContent === '.theme-css-probe { color: hsl(var(--primary)); }')).toBe(true);
+    expect(service.activeThemeText()).toContain('"css"');
+  });
+
+  it('applies a CSS-only theme over the default JSON theme', () => {
+    const applied = service.applyCssOnlyTheme('.css-only-theme { background: hsl(var(--background)); }');
+
+    expect(applied).toBe(true);
+    expect(service.activeThemeName()).toBe('Toju Default Dark');
+    expect(service.getLayoutItemStyles('dmChatPanel')).toMatchObject({
+      gridColumn: '5 / span 16',
+      gridRow: '1 / span 12'
+    });
+
+    expect(service.getHostStyles('appRoot')).toMatchObject({
+      '--background': '224 28% 7%'
+    });
+
+    expect(styleElements.some((styleElement) => styleElement.textContent === '.css-only-theme { background: hsl(var(--background)); }')).toBe(true);
+  });
+
+  it('applies CSS over the current JSON draft theme', () => {
+    const draftTheme = createDefaultThemeDocument();
+
+    draftTheme.meta = {
+      name: 'Draft Base Theme',
+      version: '1.0.0'
+    };
+
+    draftTheme.tokens.colors['background'] = '200 50% 10%';
+    draftTheme.layout['dmChatPanel'] = {
+      container: 'dmLayout',
+      grid: { x: 6, y: 0, w: 14, h: 12 }
+    };
+
+    const loadedDraft = service.loadThemeText(JSON.stringify(draftTheme), 'draft', 'Draft loaded.', 'draft JSON theme');
+    const applied = service.applyCssOnlyTheme('.draft-base-theme { color: hsl(var(--foreground)); }');
+
+    expect(loadedDraft).toBe(true);
+    expect(applied).toBe(true);
+    expect(service.activeThemeName()).toBe('Draft Base Theme');
+    expect(service.getHostStyles('appRoot')).toMatchObject({
+      '--background': '200 50% 10%'
+    });
+
+    expect(service.getLayoutItemStyles('dmChatPanel')).toMatchObject({
+      gridColumn: '7 / span 14',
+      gridRow: '1 / span 12'
+    });
+
+    expect(styleElements.some((styleElement) => styleElement.textContent === '.draft-base-theme { color: hsl(var(--foreground)); }')).toBe(true);
+  });
+
+  it('builds exportable JSON with CSS over the current draft without applying it', () => {
+    const draftTheme = createDefaultThemeDocument();
+
+    draftTheme.meta = {
+      name: 'Export Base Theme',
+      version: '1.0.0'
+    };
+
+    draftTheme.tokens.colors['background'] = '180 40% 12%';
+
+    const loadedDraft = service.loadThemeText(JSON.stringify(draftTheme), 'draft', 'Draft loaded.', 'draft JSON theme');
+    const exportText = service.buildDraftTextWithCss('.export-base-theme { color: hsl(var(--foreground)); }');
+
+    expect(loadedDraft).toBe(true);
+    expect(exportText).not.toBeNull();
+    expect(JSON.parse(exportText ?? '{}')).toMatchObject({
+      meta: {
+        name: 'Export Base Theme'
+      },
+      css: '.export-base-theme { color: hsl(var(--foreground)); }',
+      tokens: {
+        colors: {
+          background: '180 40% 12%'
+        }
+      }
+    });
+
+    expect(service.activeThemeName()).toBe('Toju Default Dark');
+  });
+
+  it('validates the dedicated DM workspace layout container', () => {
+    const theme = createDefaultThemeDocument();
+
+    theme.layout['dmConversationsPanel'] = {
+      container: 'dmLayout',
+      grid: { x: 0, y: 0, w: 5, h: 12 }
+    };
+
+    theme.layout['dmChatPanel'] = {
+      container: 'dmLayout',
+      grid: { x: 5, y: 0, w: 15, h: 12 }
+    };
+
+    const result = validateThemeDocument(theme);
+
+    expect(result.valid).toBe(true);
+    expect(result.value?.layout['dmChatPanel'].container).toBe('dmLayout');
+  });
+
+  it('allows compact JSON themes with omitted element sections', () => {
+    const loaded = service.loadThemeText(
+      JSON.stringify({
+        meta: {
+          name: 'Compact Theme',
+          version: '1.0.0'
+        },
+        elements: {
+          titleBar: {
+            backgroundImage: '/themes/city.png',
+            backgroundSize: 'cover'
+          }
+        }
+      }),
+      'apply',
+      'Theme applied.',
+      'compact JSON theme'
+    );
+
+    expect(loaded).toBe(true);
+    expect(service.getHostStyles('titleBar')).toMatchObject({
+      backgroundImage: 'url("/themes/city.png")',
+      backgroundSize: 'cover'
+    });
+
+    expect(service.getHostStyles('voiceWorkspace')).toEqual({});
+    expect(service.activeThemeText()).not.toContain('voiceWorkspace');
+  });
+
+  it('omits empty element stubs when formatting themes', () => {
+    const loaded = service.loadThemeText(
+      JSON.stringify({
+        meta: {
+          name: 'Theme With Empty Elements',
+          version: '1.0.0'
+        },
+        elements: {
+          titleBar: {},
+          voiceWorkspace: {}
+        }
+      }),
+      'apply',
+      'Theme applied.',
+      'theme with empty elements'
+    );
+
+    expect(loaded).toBe(true);
+    expect(service.activeThemeText()).not.toContain('"elements"');
+  });
+
+  it('keeps only non-empty element overrides when formatting themes', () => {
+    const loaded = service.loadThemeText(
+      JSON.stringify({
+        meta: {
+          name: 'Theme With Mixed Elements',
+          version: '1.0.0'
+        },
+        elements: {
+          titleBar: {},
+          chatRoomMainPanel: {
+            backgroundImage: '/themes/city.png'
+          }
+        }
+      }),
+      'apply',
+      'Theme applied.',
+      'theme with mixed elements'
+    );
+    const activeTheme = JSON.parse(service.activeThemeText()) as { elements?: Record<string, unknown> };
+
+    expect(loaded).toBe(true);
+    expect(activeTheme.elements).toEqual({
+      chatRoomMainPanel: {
+        backgroundImage: '/themes/city.png'
+      }
+    });
+  });
+
+  it('allows removing the entire elements section', () => {
+    const loaded = service.loadThemeText(
+      JSON.stringify({
+        meta: {
+          name: 'No Elements Theme',
+          version: '1.0.0'
+        }
+      }),
+      'apply',
+      'Theme applied.',
+      'compact JSON theme'
+    );
+
+    expect(loaded).toBe(true);
+    expect(service.getHostStyles('titleBar')).toEqual({});
+    expect(service.activeThemeText()).not.toContain('"elements"');
+  });
+});
+
+interface TestStyleElement {
+  textContent: string | null;
+  setAttribute(name: string, value: string): void;
+}
+
+function createCompleteThemeDocument() {
+  const theme = createDefaultThemeDocument();
+
+  theme.meta = {
+    name: 'Complete Theme Fixture',
+    version: '9.9.9',
+    description: 'Exercises every supported applied theme surface.'
+  };
+
+  theme.tokens.colors['background'] = '210 22% 8%';
+  theme.tokens.spacing['panelGap'] = '14px';
+  theme.tokens.radii['radius'] = '1rem';
+  theme.tokens.radii['surface'] = '1.25rem';
+  theme.tokens.effects['glassBlur'] = 'blur(20px) saturate(140%)';
+  theme.layout['dmChatPanel'] = {
+    container: 'dmLayout',
+    grid: { x: 6, y: 1, w: 14, h: 10 }
+  };
+
+  theme.elements['titleBar'] = {
+    width: 'min(100%, 64rem)',
+    height: '4rem',
+    minWidth: '18rem',
+    minHeight: '3rem',
+    maxWidth: '72rem',
+    maxHeight: '5rem',
+    position: 'sticky',
+    top: '0',
+    right: '0',
+    bottom: 'auto',
+    left: '0',
+    opacity: 0.82,
+    padding: '0.75rem 1rem',
+    margin: '0 auto',
+    border: '1px solid hsl(var(--border) / 0.75)',
+    borderRadius: '1rem',
+    backgroundColor: 'rgba(7, 11, 20, 0.88)',
+    color: '#f8fafc',
+    backgroundImage: '/themes/city.png',
+    backgroundSize: 'cover',
+    backgroundPosition: 'center',
+    backgroundRepeat: 'no-repeat',
+    gradient: 'linear-gradient(90deg, rgba(14, 165, 233, 0.28), transparent)',
+    boxShadow: '0 18px 50px rgba(0, 0, 0, 0.35)',
+    backdropFilter: 'var(--theme-effect-glass-blur)',
+    icon: 'MT',
+    textOverride: 'MetoYou Lab',
+    link: 'https://example.com/theme',
+    animationClass: 'themePulse'
+  };
+
+  theme.animations['themePulse'] = {
+    duration: '600ms',
+    easing: 'cubic-bezier(0.16, 1, 0.3, 1)',
+    delay: '50ms',
+    iterationCount: 'infinite',
+    fillMode: 'both',
+    direction: 'alternate-reverse',
+    keyframes: {
+      from: {
+        opacity: 0,
+        transform: 'scale(0.98)'
+      },
+      to: {
+        opacity: 1,
+        transform: 'scale(1)'
+      }
+    }
+  };
+
+  return theme;
+}
+
+function createDocumentStub(styleElements: TestStyleElement[]): Document {
+  return {
+    createElement: () => {
+      const styleElement: TestStyleElement = {
+        textContent: null,
+        setAttribute: () => undefined
+      };
+
+      return styleElement;
+    },
+    head: {
+      appendChild: (styleElement: TestStyleElement) => {
+        styleElements.push(styleElement);
+        return styleElement;
+      }
+    }
+  } as unknown as Document;
+}
+
+function installLocalStorageMock(): void {
+  const values = new Map<string, string>();
+
+  vi.stubGlobal('localStorage', {
+    getItem: (key: string) => values.get(key) ?? null,
+    setItem: (key: string, value: string) => values.set(key, value),
+    removeItem: (key: string) => values.delete(key),
+    clear: () => values.clear()
+  });
+}
diff --git a/toju-app/src/app/domains/theme/application/services/theme.service.ts b/toju-app/src/app/domains/theme/application/services/theme.service.ts
index 1fefe6b..f1ff4a5 100644
--- a/toju-app/src/app/domains/theme/application/services/theme.service.ts
+++ b/toju-app/src/app/domains/theme/application/services/theme.service.ts
@@ -17,6 +17,7 @@ import {
 import {
   DEFAULT_THEME_JSON,
   createDefaultThemeDocument,
+  createDefaultThemeLayout,
   isLegacyDefaultThemeDocument
 } from '../../domain/logic/theme-defaults.logic';
 import { createAnimationStarterDefinition } from '../../domain/logic/theme-schema.logic';
@@ -35,14 +36,68 @@ function toKebabCase(value: string): string {
     .toLowerCase();
 }
 
+function isEmptyRecord(value: Record<string, unknown>): boolean {
+  return Object.keys(value).length === 0;
+}
+
+function hasTokenOverrides(document: ThemeDocument): boolean {
+  return (
+    !isEmptyRecord(document.tokens.colors) ||
+    !isEmptyRecord(document.tokens.spacing) ||
+    !isEmptyRecord(document.tokens.radii) ||
+    !isEmptyRecord(document.tokens.effects)
+  );
+}
+
+function compactThemeElements(elements: ThemeDocument['elements']): ThemeDocument['elements'] {
+  return Object.fromEntries(Object.entries(elements).filter(([_key, styles]) => !isEmptyRecord(styles as Record<string, unknown>)));
+}
+
 function stringifyTheme(document: ThemeDocument): string {
-  return JSON.stringify(document, null, 2);
+  const jsonDocument: Partial<ThemeDocument> = {
+    meta: document.meta
+  };
+  const compactElements = compactThemeElements(document.elements);
+
+  if (document.css.trim().length > 0) {
+    jsonDocument.css = document.css;
+  }
+
+  if (hasTokenOverrides(document)) {
+    jsonDocument.tokens = document.tokens;
+  }
+
+  if (!isEmptyRecord(document.layout)) {
+    jsonDocument.layout = document.layout;
+  }
+
+  if (!isEmptyRecord(compactElements)) {
+    jsonDocument.elements = compactElements;
+  }
+
+  if (!isEmptyRecord(document.animations)) {
+    jsonDocument.animations = document.animations;
+  }
+
+  return JSON.stringify(jsonDocument, null, 2);
+}
+
+function looksLikeImageReference(value: string): boolean {
+  return value.startsWith('http://') || value.startsWith('https://') || value.startsWith('/') || value.startsWith('./') || value.startsWith('../');
+}
+
+function normalizeBackgroundImageLayer(value: string): string {
+  const trimmedValue = value.trim();
+
+  if (!looksLikeImageReference(trimmedValue)) {
+    return trimmedValue;
+  }
+
+  return `url("${trimmedValue.replace(/"/g, '\\"')}")`;
 }
 
 function resolveBuiltInDefaultMigration(document: ThemeDocument): ThemeDocument {
-  return isLegacyDefaultThemeDocument(document)
-    ? createDefaultThemeDocument()
-    : document;
+  return isLegacyDefaultThemeDocument(document) ? createDefaultThemeDocument() : document;
 }
 
 const hostStylePropertyKeys = [
@@ -96,6 +151,7 @@ export class ThemeService {
   private initialized = false;
   private statusTimeoutId: ReturnType<typeof setTimeout> | null = null;
   private animationStyleElement: HTMLStyleElement | null = null;
+  private cssStyleElement: HTMLStyleElement | null = null;
 
   constructor() {
     this.activeTheme = this.activeThemeInternal.asReadonly();
@@ -159,6 +215,7 @@ export class ThemeService {
     }
 
     this.syncAnimationStylesheet();
+    this.syncCssStylesheet();
   }
 
   updateDraftText(text: string): void {
@@ -203,12 +260,26 @@ export class ThemeService {
     return true;
   }
 
-  loadThemeText(
-    text: string,
-    mode: 'draft' | 'apply',
-    successMessage: string,
-    sourceLabel = 'theme'
-  ): boolean {
+  buildDraftTextWithCss(css: string): string | null {
+    const theme = this.composeDraftThemeWithCss(css);
+
+    return theme ? stringifyTheme(theme) : null;
+  }
+
+  applyCssOnlyTheme(css: string): boolean {
+    const theme = this.composeDraftThemeWithCss(css);
+
+    if (!theme) {
+      return false;
+    }
+
+    const formatted = stringifyTheme(theme);
+
+    this.commitTheme(theme, formatted, 'CSS applied over the JSON theme.');
+    return true;
+  }
+
+  loadThemeText(text: string, mode: 'draft' | 'apply', successMessage: string, sourceLabel = 'theme'): boolean {
     const result = this.parseAndValidateTheme(text, sourceLabel);
 
     if (!result.valid || !result.value) {
@@ -250,9 +321,8 @@ export class ThemeService {
     saveActiveThemeText(defaultText);
     saveDraftThemeText(defaultText);
     this.syncAnimationStylesheet();
-    this.setStatusMessage(reason === 'shortcut'
-      ? 'Theme reset to the default preset by shortcut.'
-      : 'Theme reset to the default preset.');
+    this.syncCssStylesheet();
+    this.setStatusMessage(reason === 'shortcut' ? 'Theme reset to the default preset by shortcut.' : 'Theme reset to the default preset.');
   }
 
   handleGlobalShortcut(event: KeyboardEvent): boolean {
@@ -268,41 +338,71 @@ export class ThemeService {
   }
 
   ensureElementEntry(key: string): void {
-    this.updateStructuredDraft((draft) => {
-      draft.elements[key] = draft.elements[key] ?? {};
-    }, false, `Prepared ${key} in the theme draft.`);
+    if (!this.draftIsValidInternal()) {
+      this.setStatusMessage('Fix JSON errors before using the structured theme tools.');
+      return;
+    }
+
+    const draftJson = JSON.parse(this.draftTextInternal()) as Record<string, unknown>;
+    const existingElements = draftJson['elements'];
+    const elements =
+      existingElements && typeof existingElements === 'object' && !Array.isArray(existingElements)
+        ? { ...(existingElements as Record<string, unknown>) }
+        : {};
+
+    elements[key] = elements[key] ?? {};
+    draftJson['elements'] = elements;
+
+    const result = validateThemeDocument(draftJson);
+
+    if (!result.valid || !result.value) {
+      this.setStatusMessage('The structured change could not be validated.');
+      return;
+    }
+
+    const formatted = JSON.stringify(draftJson, null, 2);
+
+    this.draftThemeInternal.set(result.value);
+    this.draftTextInternal.set(formatted);
+    this.draftIsValidInternal.set(true);
+    this.draftErrorsInternal.set([]);
+    saveDraftThemeText(formatted);
+    this.setStatusMessage(`Prepared ${key} in the theme draft.`);
   }
 
   ensureLayoutEntry(key: string): void {
-    this.updateStructuredDraft((draft) => {
-      const defaults = createDefaultThemeDocument();
+    this.updateStructuredDraft(
+      (draft) => {
+        const defaults = createDefaultThemeLayout();
 
-      draft.layout[key] = draft.layout[key] ?? defaults.layout[key];
-    }, false, `Prepared ${key} layout in the theme draft.`);
+        draft.layout[key] = draft.layout[key] ?? defaults[key];
+      },
+      false,
+      `Prepared ${key} layout in the theme draft.`
+    );
   }
 
-  setElementStyle(
-    key: string,
-    property: ThemeElementStyleProperty,
-    value: string | number,
-    applyImmediately = true
-  ): void {
-    this.updateStructuredDraft((draft) => {
-      draft.elements[key] = {
-        ...draft.elements[key],
-        [property]: value
-      };
-    }, applyImmediately, `${key} updated.`);
+  setElementStyle(key: string, property: ThemeElementStyleProperty, value: string | number, applyImmediately = true): void {
+    this.updateStructuredDraft(
+      (draft) => {
+        draft.elements[key] = {
+          ...draft.elements[key],
+          [property]: value
+        };
+      },
+      applyImmediately,
+      `${key} updated.`
+    );
   }
 
-  setAnimation(
-    key: string,
-    definition: ThemeAnimationDefinition = createAnimationStarterDefinition(),
-    applyImmediately = true
-  ): void {
-    this.updateStructuredDraft((draft) => {
-      draft.animations[key] = definition;
-    }, applyImmediately, `Animation ${key} updated.`);
+  setAnimation(key: string, definition: ThemeAnimationDefinition = createAnimationStarterDefinition(), applyImmediately = true): void {
+    this.updateStructuredDraft(
+      (draft) => {
+        draft.animations[key] = definition;
+      },
+      applyImmediately,
+      `Animation ${key} updated.`
+    );
   }
 
   getHostStyles(key: string): Record<string, string> {
@@ -314,7 +414,8 @@ export class ThemeService {
     }
 
     const backgroundLayers = [elementTheme.gradient, elementTheme.backgroundImage]
-      .filter((layer): layer is string => typeof layer === 'string' && layer.trim().length > 0);
+      .filter((layer): layer is string => typeof layer === 'string' && layer.trim().length > 0)
+      .map((layer) => normalizeBackgroundImageLayer(layer));
 
     if (backgroundLayers.length > 0) {
       styles['backgroundImage'] = backgroundLayers.join(', ');
@@ -338,9 +439,7 @@ export class ThemeService {
   getAnimationClass(key: string): string | null {
     const animationClass = this.activeThemeInternal().elements[key]?.animationClass?.trim();
 
-    return animationClass && animationClass.length > 0
-      ? animationClass
-      : null;
+    return animationClass && animationClass.length > 0 ? animationClass : null;
   }
 
   getLink(key: string): string | null {
@@ -367,17 +466,15 @@ export class ThemeService {
     return {
       display: 'grid',
       gridTemplateColumns: container.templateColumns ?? `repeat(${container.columns}, minmax(0, 1fr))`,
-      gridTemplateRows: container.templateRows ?? (container.rows === 1
-        ? 'minmax(0, 1fr)'
-        : `repeat(${container.rows}, minmax(0, 1fr))`),
+      gridTemplateRows: container.templateRows ?? (container.rows === 1 ? 'minmax(0, 1fr)' : `repeat(${container.rows}, minmax(0, 1fr))`),
       minHeight: '0',
       minWidth: '0'
     };
   }
 
   getLayoutItemStyles(key: string): Record<string, string> {
-    const defaults = createDefaultThemeDocument();
-    const layoutEntry = this.activeThemeInternal().layout[key] ?? defaults.layout[key];
+    const defaults = createDefaultThemeLayout();
+    const layoutEntry = this.activeThemeInternal().layout[key] ?? defaults[key];
 
     if (!layoutEntry) {
       return {};
@@ -391,11 +488,7 @@ export class ThemeService {
     };
   }
 
-  updateStructuredDraft(
-    mutator: (draft: ThemeDocument) => void,
-    applyImmediately: boolean,
-    successMessage: string
-  ): void {
+  updateStructuredDraft(mutator: (draft: ThemeDocument) => void, applyImmediately: boolean, successMessage: string): void {
     if (!this.draftIsValidInternal()) {
       this.setStatusMessage('Fix JSON errors before using the structured theme tools.');
       return;
@@ -438,9 +531,30 @@ export class ThemeService {
     saveActiveThemeText(text);
     saveDraftThemeText(text);
     this.syncAnimationStylesheet();
+    this.syncCssStylesheet();
     this.setStatusMessage(successMessage);
   }
 
+  private composeDraftThemeWithCss(css: string): ThemeDocument | null {
+    if (!this.draftIsValidInternal()) {
+      this.setStatusMessage('Fix JSON errors before applying CSS over the theme draft.');
+      return null;
+    }
+
+    const theme = {
+      ...structuredClone(this.draftThemeInternal()),
+      css
+    };
+    const result = validateThemeDocument(theme);
+
+    if (!result.valid || !result.value) {
+      this.setStatusMessage(result.errors[0] ?? 'The CSS-only theme could not be applied.');
+      return null;
+    }
+
+    return result.value;
+  }
+
   private parseAndValidateTheme(text: string, label: string) {
     try {
       return validateThemeDocument(JSON.parse(text) as unknown);
@@ -465,9 +579,7 @@ export class ThemeService {
     }
 
     for (const [tokenName, tokenValue] of Object.entries(theme.tokens.radii)) {
-      const cssVariableName = tokenName === 'radius'
-        ? '--radius'
-        : `--theme-radius-${toKebabCase(tokenName)}`;
+      const cssVariableName = tokenName === 'radius' ? '--radius' : `--theme-radius-${toKebabCase(tokenName)}`;
 
       styles[cssVariableName] = tokenValue;
     }
@@ -495,6 +607,18 @@ export class ThemeService {
     this.animationStyleElement.textContent = css;
   }
 
+  private syncCssStylesheet(): void {
+    const css = this.activeThemeInternal().css.trim();
+
+    if (!this.cssStyleElement) {
+      this.cssStyleElement = this.documentRef.createElement('style');
+      this.cssStyleElement.setAttribute('data-toju-theme-css', 'true');
+      this.documentRef.head.appendChild(this.cssStyleElement);
+    }
+
+    this.cssStyleElement.textContent = css;
+  }
+
   private buildAnimationRule(className: string, definition: ThemeAnimationDefinition): string {
     const animationClass = `.${className}`;
     const declarationLines = [
diff --git a/toju-app/src/app/domains/theme/domain/constants/theme-llm-guide.constants.ts b/toju-app/src/app/domains/theme/domain/constants/theme-llm-guide.constants.ts
index 27d07dc..73593d6 100644
--- a/toju-app/src/app/domains/theme/domain/constants/theme-llm-guide.constants.ts
+++ b/toju-app/src/app/domains/theme/domain/constants/theme-llm-guide.constants.ts
@@ -7,15 +7,11 @@ import {
 } from '../logic/theme-schema.logic';
 
 function formatExample(example: string | number): string {
-  return typeof example === 'number'
-    ? `${example}`
-    : JSON.stringify(example);
+  return typeof example === 'number' ? `${example}` : JSON.stringify(example);
 }
 
 function getLayoutKeysForContainer(containerKey: string): string[] {
-  return THEME_REGISTRY
-    .filter((entry) => entry.container === containerKey && entry.layoutEditable)
-    .map((entry) => entry.key);
+  return THEME_REGISTRY.filter((entry) => entry.container === containerKey && entry.layoutEditable).map((entry) => entry.key);
 }
 
 function describeCapabilities(entry: (typeof THEME_REGISTRY)[number]): string {
@@ -26,9 +22,7 @@ function describeCapabilities(entry: (typeof THEME_REGISTRY)[number]): string {
     entry.supportsIcon ? 'icon' : null
   ].filter((value): value is string => value !== null);
 
-  return capabilities.length > 0
-    ? capabilities.join(', ')
-    : 'visual style overrides only';
+  return capabilities.length > 0 ? capabilities.join(', ') : 'visual style overrides only';
 }
 
 function describeLayoutContainer(container: (typeof THEME_LAYOUT_CONTAINERS)[number]): string {
@@ -56,15 +50,16 @@ function describeThemeEntry(entry: (typeof THEME_REGISTRY)[number]): string {
 const colorTokenKeys = Object.keys(DEFAULT_THEME_DOCUMENT.tokens.colors);
 const radiusTokenKeys = Object.keys(DEFAULT_THEME_DOCUMENT.tokens.radii);
 const effectTokenKeys = Object.keys(DEFAULT_THEME_DOCUMENT.tokens.effects);
-const layoutEditableKeys = THEME_REGISTRY
-  .filter((entry) => entry.layoutEditable)
-  .map((entry) => entry.key);
+const layoutEditableKeys = THEME_REGISTRY.filter((entry) => entry.layoutEditable).map((entry) => entry.key);
+const layoutContainerKeys = THEME_LAYOUT_CONTAINERS.map((container) => container.key);
+const layoutContainerUnion = layoutContainerKeys.map((key) => `"${key}"`).join(' | ');
 const guideTemplateDocument = {
   meta: {
     name: 'Theme Name',
     version: '1.0.0',
     description: 'Short mood and material direction.'
   },
+  css: '',
   tokens: {
     colors: {
       background: '224 28% 7%',
@@ -102,6 +97,9 @@ const guideTemplateDocument = {
     },
     chatRoomMainPanel: {
       backgroundColor: 'hsl(var(--panel-background) / 0.82)',
+      backgroundImage: '/assets/themes/paper-noise.png',
+      backgroundSize: 'cover',
+      backgroundPosition: 'center',
       borderRadius: 'var(--theme-radius-surface)',
       boxShadow: 'var(--theme-effect-panel-shadow)'
     }
@@ -119,12 +117,13 @@ export const THEME_LLM_GUIDE = [
   '- Return JSON only when asked to generate a theme. Do not wrap the result in Markdown fences or add commentary.',
   '',
   'Core rules',
-  '- Keep the top-level keys exactly: meta, tokens, layout, elements, animations.',
+  '- Supported top-level keys are meta, css, tokens, layout, elements, and animations. Omit sections that do not need overrides.',
   '- Use strict JSON with double-quoted keys, no comments, and no trailing commas.',
-  '- Omitted optional keys inherit from the built-in default theme, so leave out anything you are not intentionally changing.',
+  '- Omitted layout keys use the app default placement. Omitted element keys apply no Theme Studio visual override.',
   '- Do not invent new top-level sections, layout containers, or element style properties.',
   '- links must be absolute http or https URLs.',
   '- animationClass must be a safe CSS class token and should match an entry in animations or an existing class already shipped by the app.',
+  '- css is optional raw CSS applied after the JSON theme is active. Keep selectors scoped to app/theme surfaces when possible.',
   '- layout.grid values must be integers. x and y are zero-based. w and h must be greater than 0.',
   '- opacity must be a number between 0 and 1.',
   '',
@@ -139,6 +138,8 @@ export const THEME_LLM_GUIDE = [
   '- tokens.colors entries become CSS variables like --background or --surface-highlight-alt.',
   '- Color token values should usually be raw HSL channels such as "224 28% 7%". The shell wraps many built-in color tokens with hsl(var(--token)).',
   '- You may add extra color tokens if you also reference them with CSS variables in element overrides.',
+  '- elements.<key>.backgroundImage accepts a CSS background-image value, a local image path, or an http/https image URL.',
+  '- Use backgroundSize and backgroundPosition with backgroundImage when the image needs cover/center behavior.',
   '- tokens.spacing entries become --theme-spacing-<kebab-case-key>.',
   '- tokens.radii.radius maps to --radius. Other radius keys become --theme-radius-<kebab-case-key>.',
   '- tokens.effects entries become --theme-effect-<kebab-case-key>.',
@@ -148,8 +149,9 @@ export const THEME_LLM_GUIDE = [
   '',
   'Top-level schema reference',
   '- meta: { name: string, version: string, description?: string }',
+  '- css?: string',
   '- tokens: { colors: Record<string, string>, spacing: Record<string, string>, radii: Record<string, string>, effects: Record<string, string> }',
-  '- layout: Record<string, { container: "appShell" | "roomLayout", grid: { x: number, y: number, w: number, h: number } }>',
+  `- layout: Record<string, { container: ${layoutContainerUnion}, grid: { x: number, y: number, w: number, h: number } }>`,
   '- elements: Record<string, ThemeElementStyles>',
   '- animations: Record<string, { duration?, easing?, delay?, iterationCount?, fillMode?, direction?, keyframes? }>',
   '',
diff --git a/toju-app/src/app/domains/theme/domain/logic/theme-defaults.logic.ts b/toju-app/src/app/domains/theme/domain/logic/theme-defaults.logic.ts
index 2d92fd9..65a1689 100644
--- a/toju-app/src/app/domains/theme/domain/logic/theme-defaults.logic.ts
+++ b/toju-app/src/app/domains/theme/domain/logic/theme-defaults.logic.ts
@@ -3,50 +3,41 @@ import {
   ThemeElementStyles,
   ThemeLayoutEntry
 } from '../models/theme.model';
-import {
-  THEME_LAYOUT_CONTAINERS,
-  THEME_REGISTRY,
-  getLayoutEditableThemeKeys
-} from './theme-registry.logic';
+import { THEME_LAYOUT_CONTAINERS, getLayoutEditableThemeKeys } from './theme-registry.logic';
 
-const APP_ROOT_BASE_GRADIENT =
-  'radial-gradient(circle at top, '
-  + 'hsl(var(--surface-highlight) / 0.18), transparent 34%)';
-const APP_ROOT_OVERLAY_GRADIENT = 'linear-gradient(180deg, rgba(5, 8, 15, 0.98), rgba(9, 12, 20, 1))';
-const APP_ROOT_GRADIENT_LAYERS = [APP_ROOT_BASE_GRADIENT, APP_ROOT_OVERLAY_GRADIENT] as const;
-const APP_WORKSPACE_BASE_GRADIENT =
-  'radial-gradient(circle at top right, '
-  + 'hsl(var(--surface-highlight-alt) / 0.14), transparent 30%)';
-const APP_WORKSPACE_OVERLAY_GRADIENT = 'linear-gradient(180deg, rgba(9, 12, 21, 0.96), rgba(7, 10, 18, 1))';
-const APP_WORKSPACE_GRADIENT_LAYERS = [APP_WORKSPACE_BASE_GRADIENT, APP_WORKSPACE_OVERLAY_GRADIENT] as const;
-const CHAT_ROOM_MAIN_PANEL_BASE_GRADIENT =
-  'radial-gradient(circle at top, '
-  + 'hsl(var(--surface-highlight) / 0.12), transparent 28%)';
-const CHAT_ROOM_MAIN_PANEL_OVERLAY_GRADIENT = 'linear-gradient(180deg, rgba(16, 20, 34, 0.82), rgba(8, 11, 19, 0.92))';
-const CHAT_ROOM_MAIN_PANEL_GRADIENT_LAYERS = [CHAT_ROOM_MAIN_PANEL_BASE_GRADIENT, CHAT_ROOM_MAIN_PANEL_OVERLAY_GRADIENT] as const;
-const VOICE_WORKSPACE_BASE_GRADIENT =
-  'radial-gradient(circle at top right, '
-  + 'hsl(var(--surface-highlight) / 0.14), transparent 32%)';
-const VOICE_WORKSPACE_OVERLAY_GRADIENT = 'linear-gradient(180deg, rgba(18, 23, 37, 0.78), rgba(9, 12, 21, 0.88))';
-const VOICE_WORKSPACE_GRADIENT_LAYERS = [VOICE_WORKSPACE_BASE_GRADIENT, VOICE_WORKSPACE_OVERLAY_GRADIENT] as const;
-
-function createDefaultElements(): Record<string, ThemeElementStyles> {
-  return Object.fromEntries(
-    THEME_REGISTRY.map((entry) => [entry.key, {}])
-  ) as Record<string, ThemeElementStyles>;
+function createProvidedDefaultLayout(): Record<string, ThemeLayoutEntry> {
+  return {
+    serversRail: {
+      container: 'appShell',
+      grid: { x: 0, y: 0, w: 1, h: 1 }
+    },
+    appWorkspace: {
+      container: 'appShell',
+      grid: { x: 1, y: 0, w: 19, h: 1 }
+    },
+    chatRoomChannelsPanel: {
+      container: 'roomLayout',
+      grid: { x: 0, y: 0, w: 4, h: 12 }
+    },
+    chatRoomMainPanel: {
+      container: 'roomLayout',
+      grid: { x: 4, y: 0, w: 12, h: 12 }
+    },
+    chatRoomMembersPanel: {
+      container: 'roomLayout',
+      grid: { x: 16, y: 0, w: 4, h: 12 }
+    }
+  };
 }
 
-function createDefaultLayout(): Record<string, ThemeLayoutEntry> {
+export function createDefaultThemeLayout(): Record<string, ThemeLayoutEntry> {
   const layoutEntries: Record<string, ThemeLayoutEntry> = {};
 
   for (const key of getLayoutEditableThemeKeys()) {
     if (key === 'serversRail') {
       layoutEntries[key] = {
         container: 'appShell',
-        grid: { x: 0,
-          y: 0,
-          w: 1,
-          h: 1 }
+        grid: { x: 0, y: 0, w: 1, h: 1 }
       };
 
       continue;
@@ -57,10 +48,7 @@ function createDefaultLayout(): Record<string, ThemeLayoutEntry> {
 
       layoutEntries[key] = {
         container: 'appShell',
-        grid: { x: 1,
-          y: 0,
-          w: (appShell?.columns ?? 20) - 1,
-          h: 1 }
+        grid: { x: 1, y: 0, w: (appShell?.columns ?? 20) - 1, h: 1 }
       };
 
       continue;
@@ -69,10 +57,7 @@ function createDefaultLayout(): Record<string, ThemeLayoutEntry> {
     if (key === 'chatRoomChannelsPanel') {
       layoutEntries[key] = {
         container: 'roomLayout',
-        grid: { x: 0,
-          y: 0,
-          w: 4,
-          h: 12 }
+        grid: { x: 0, y: 0, w: 4, h: 12 }
       };
 
       continue;
@@ -81,10 +66,7 @@ function createDefaultLayout(): Record<string, ThemeLayoutEntry> {
     if (key === 'chatRoomMainPanel') {
       layoutEntries[key] = {
         container: 'roomLayout',
-        grid: { x: 4,
-          y: 0,
-          w: 12,
-          h: 12 }
+        grid: { x: 4, y: 0, w: 12, h: 12 }
       };
 
       continue;
@@ -93,10 +75,7 @@ function createDefaultLayout(): Record<string, ThemeLayoutEntry> {
     if (key === 'chatRoomMembersPanel') {
       layoutEntries[key] = {
         container: 'roomLayout',
-        grid: { x: 16,
-          y: 0,
-          w: 4,
-          h: 12 }
+        grid: { x: 16, y: 0, w: 4, h: 12 }
       };
 
       continue;
@@ -104,11 +83,8 @@ function createDefaultLayout(): Record<string, ThemeLayoutEntry> {
 
     if (key === 'dmConversationsPanel') {
       layoutEntries[key] = {
-        container: 'roomLayout',
-        grid: { x: 0,
-          y: 0,
-          w: 4,
-          h: 12 }
+        container: 'dmLayout',
+        grid: { x: 0, y: 0, w: 4, h: 12 }
       };
 
       continue;
@@ -116,11 +92,8 @@ function createDefaultLayout(): Record<string, ThemeLayoutEntry> {
 
     if (key === 'dmChatPanel') {
       layoutEntries[key] = {
-        container: 'roomLayout',
-        grid: { x: 4,
-          y: 0,
-          w: 16,
-          h: 12 }
+        container: 'dmLayout',
+        grid: { x: 4, y: 0, w: 16, h: 12 }
       };
     }
   }
@@ -128,105 +101,6 @@ function createDefaultLayout(): Record<string, ThemeLayoutEntry> {
   return layoutEntries;
 }
 
-function createDarkDefaultElements(): Record<string, ThemeElementStyles> {
-  const elements = createDefaultElements();
-
-  elements['appRoot'] = {
-    backgroundColor: 'hsl(var(--background))',
-    color: 'hsl(var(--foreground))',
-    gradient: APP_ROOT_GRADIENT_LAYERS.join(', ')
-  };
-
-  elements['serversRail'] = {
-    backgroundColor: 'hsl(var(--rail-background) / 0.96)',
-    gradient: 'linear-gradient(180deg, rgba(10, 14, 25, 0.92), rgba(6, 9, 16, 0.98))',
-    boxShadow: 'inset -1px 0 0 hsl(var(--border) / 0.82), 18px 0 38px rgba(0, 0, 0, 0.22)',
-    backdropFilter: 'var(--theme-effect-glass-blur)'
-  };
-
-  elements['appWorkspace'] = {
-    backgroundColor: 'hsl(var(--workspace-background))',
-    gradient: APP_WORKSPACE_GRADIENT_LAYERS.join(', ')
-  };
-
-  elements['titleBar'] = {
-    backgroundColor: 'hsl(var(--title-bar-background) / 0.82)',
-    color: 'hsl(var(--foreground))',
-    gradient: 'linear-gradient(180deg, rgba(20, 26, 41, 0.52), rgba(7, 10, 18, 0.18))',
-    boxShadow: ['inset 0 -1px 0 hsl(var(--border) / 0.78)', '0 12px 28px rgba(0, 0, 0, 0.18)'].join(', '),
-    backdropFilter: 'var(--theme-effect-glass-blur)'
-  };
-
-  elements['chatRoomChannelsPanel'] = {
-    backgroundColor: 'hsl(var(--panel-background) / 0.9)',
-    color: 'hsl(var(--foreground))',
-    border: '1px solid hsl(var(--border) / 0.7)',
-    borderRadius: 'var(--theme-radius-surface)',
-    gradient: 'linear-gradient(180deg, rgba(18, 24, 38, 0.82), rgba(10, 13, 23, 0.88))',
-    boxShadow: 'var(--theme-effect-soft-shadow)',
-    backdropFilter: 'var(--theme-effect-glass-blur)'
-  };
-
-  elements['chatRoomMainPanel'] = {
-    backgroundColor: 'hsl(var(--panel-background) / 0.82)',
-    color: 'hsl(var(--foreground))',
-    border: '1px solid hsl(var(--border) / 0.62)',
-    borderRadius: 'var(--theme-radius-surface)',
-    gradient: CHAT_ROOM_MAIN_PANEL_GRADIENT_LAYERS.join(', '),
-    boxShadow: 'var(--theme-effect-panel-shadow)',
-    backdropFilter: 'var(--theme-effect-glass-blur)'
-  };
-
-  elements['chatRoomMembersPanel'] = {
-    backgroundColor: 'hsl(var(--panel-background-alt) / 0.92)',
-    color: 'hsl(var(--foreground))',
-    border: '1px solid hsl(var(--border) / 0.7)',
-    borderRadius: 'var(--theme-radius-surface)',
-    gradient: 'linear-gradient(180deg, rgba(22, 27, 41, 0.82), rgba(11, 14, 24, 0.9))',
-    boxShadow: 'var(--theme-effect-soft-shadow)',
-    backdropFilter: 'var(--theme-effect-glass-blur)'
-  };
-
-  elements['dmConversationsPanel'] = {
-    ...elements['chatRoomChannelsPanel']
-  };
-
-  elements['dmChatPanel'] = {
-    ...elements['chatRoomMainPanel']
-  };
-
-  elements['chatRoomEmptyState'] = {
-    backgroundColor: 'hsl(var(--panel-background-alt) / 0.88)',
-    color: 'hsl(var(--muted-foreground))',
-    border: '1px dashed hsl(var(--border) / 0.7)',
-    borderRadius: 'var(--theme-radius-surface)',
-    gradient: 'radial-gradient(circle at top, hsl(var(--surface-highlight) / 0.08), transparent 45%)',
-    boxShadow: 'var(--theme-effect-soft-shadow)'
-  };
-
-  elements['voiceWorkspace'] = {
-    backgroundColor: 'hsl(var(--panel-background) / 0.74)',
-    color: 'hsl(var(--foreground))',
-    border: '1px solid hsl(var(--border) / 0.62)',
-    borderRadius: 'calc(var(--theme-radius-surface) + 0.2rem)',
-    gradient: VOICE_WORKSPACE_GRADIENT_LAYERS.join(', '),
-    boxShadow: 'var(--theme-effect-panel-shadow)',
-    backdropFilter: 'var(--theme-effect-glass-blur)'
-  };
-
-  elements['floatingVoiceControls'] = {
-    backgroundColor: 'hsl(var(--panel-background-alt) / 0.94)',
-    color: 'hsl(var(--foreground))',
-    border: '1px solid hsl(var(--border) / 0.78)',
-    borderRadius: 'var(--theme-radius-pill)',
-    gradient: 'linear-gradient(180deg, rgba(24, 31, 47, 0.92), rgba(13, 17, 29, 0.96))',
-    boxShadow: 'var(--theme-effect-soft-shadow)',
-    backdropFilter: 'var(--theme-effect-glass-blur)'
-  };
-
-  return elements;
-}
-
 function hasOnlyLegacyRadius(radii: Record<string, string>): boolean {
   const keys = Object.keys(radii);
 
@@ -239,6 +113,7 @@ function allElementsEmpty(elements: Record<string, ThemeElementStyles>): boolean
 
 export function createDefaultThemeDocument(): ThemeDocument {
   return {
+    css: '',
     meta: {
       name: 'Toju Default Dark',
       version: '2.0.0',
@@ -285,23 +160,34 @@ export function createDefaultThemeDocument(): ThemeDocument {
         glassBlur: 'blur(18px) saturate(135%)'
       }
     },
-    layout: createDefaultLayout(),
-    elements: createDarkDefaultElements(),
+    layout: createProvidedDefaultLayout(),
+    elements: {},
     animations: {}
   };
 }
 
 export function isLegacyDefaultThemeDocument(document: ThemeDocument): boolean {
-  return document.meta.name === 'Toju Default Theme'
-    && document.meta.version === '1.0.0'
-    && document.meta.description === 'Safe baseline theme that matches the built-in Toju shell layout.'
-    && Object.keys(document.tokens.colors).length === 0
-    && Object.keys(document.tokens.spacing).length === 0
-    && hasOnlyLegacyRadius(document.tokens.radii)
-    && Object.keys(document.tokens.effects).length === 0
-    && allElementsEmpty(document.elements)
-    && Object.keys(document.animations).length === 0;
+  return (
+    document.meta.name === 'Toju Default Theme' &&
+    document.meta.version === '1.0.0' &&
+    document.meta.description === 'Safe baseline theme that matches the built-in Toju shell layout.' &&
+    Object.keys(document.tokens.colors).length === 0 &&
+    Object.keys(document.tokens.spacing).length === 0 &&
+    hasOnlyLegacyRadius(document.tokens.radii) &&
+    Object.keys(document.tokens.effects).length === 0 &&
+    allElementsEmpty(document.elements) &&
+    Object.keys(document.animations).length === 0 &&
+    document.css.length === 0
+  );
 }
 
 export const DEFAULT_THEME_DOCUMENT: ThemeDocument = createDefaultThemeDocument();
-export const DEFAULT_THEME_JSON = JSON.stringify(DEFAULT_THEME_DOCUMENT, null, 2);
+export const DEFAULT_THEME_JSON = JSON.stringify(
+  {
+    meta: DEFAULT_THEME_DOCUMENT.meta,
+    tokens: DEFAULT_THEME_DOCUMENT.tokens,
+    layout: DEFAULT_THEME_DOCUMENT.layout
+  },
+  null,
+  2
+);
diff --git a/toju-app/src/app/domains/theme/domain/logic/theme-registry.logic.ts b/toju-app/src/app/domains/theme/domain/logic/theme-registry.logic.ts
index 2471bd3..3bf51bd 100644
--- a/toju-app/src/app/domains/theme/domain/logic/theme-registry.logic.ts
+++ b/toju-app/src/app/domains/theme/domain/logic/theme-registry.logic.ts
@@ -16,6 +16,14 @@ export const THEME_LAYOUT_CONTAINERS: readonly ThemeLayoutContainerDefinition[]
     columns: 20,
     rows: 12,
     templateColumns: 'repeat(4, 4.25rem) repeat(12, minmax(0, 1fr)) repeat(4, 4.25rem)'
+  },
+  {
+    key: 'dmLayout',
+    label: 'DM Workspace',
+    description: 'Controls the conversations list and private chat panel inside direct messages.',
+    columns: 20,
+    rows: 12,
+    templateColumns: 'repeat(4, 4.25rem) repeat(16, minmax(0, 1fr))'
   }
 ];
 
@@ -66,6 +74,39 @@ export const THEME_REGISTRY: readonly ThemeRegistryEntry[] = [
     supportsLink: true,
     supportsIcon: true
   },
+  {
+    key: 'serversRailCreateButton',
+    label: 'Create Server Button',
+    description: 'The primary action at the top of the server rail for creating or joining servers.',
+    category: 'shell',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'serversRailList',
+    label: 'Servers List',
+    description: 'The scrollable stack of saved server shortcuts in the left rail.',
+    category: 'shell',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'serversRailItem',
+    label: 'Server Shortcut',
+    description: 'An individual saved server icon button in the left rail.',
+    category: 'shell',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
   {
     key: 'chatRoomChannelsPanel',
     label: 'Channels Panel',
@@ -78,6 +119,72 @@ export const THEME_REGISTRY: readonly ThemeRegistryEntry[] = [
     supportsLink: false,
     supportsIcon: false
   },
+  {
+    key: 'roomPanelHeader',
+    label: 'Room Panel Header',
+    description: 'The header at the top of the room side panel with server or member context.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'roomTextChannelsSection',
+    label: 'Text Channels Section',
+    description: 'The side-panel section that groups text channels.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'roomTextChannelItem',
+    label: 'Text Channel Item',
+    description: 'An individual text channel row in the room side panel.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'roomVoiceChannelsSection',
+    label: 'Voice Channels Section',
+    description: 'The side-panel section that groups voice channels.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'roomVoiceChannelItem',
+    label: 'Voice Channel Item',
+    description: 'An individual voice channel row in the room side panel.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'roomVoiceUserItem',
+    label: 'Voice User Item',
+    description: 'A user row nested under a voice channel.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
   {
     key: 'chatRoomMainPanel',
     label: 'Chat Panel',
@@ -90,6 +197,182 @@ export const THEME_REGISTRY: readonly ThemeRegistryEntry[] = [
     supportsLink: false,
     supportsIcon: false
   },
+  {
+    key: 'chatSurface',
+    label: 'Chat Surface',
+    description: 'The message area surface shared by room chat views.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatMessageList',
+    label: 'Message List',
+    description: 'The scrollable list that contains message bubbles, date separators, and load-more states.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatDateSeparator',
+    label: 'Date Separator',
+    description: 'The horizontal date divider inserted between groups of chat messages.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatNewMessagesBar',
+    label: 'New Messages Bar',
+    description: 'The sticky prompt for jumping to unread messages.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: true,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatMessageBubble',
+    label: 'Message Bubble',
+    description: 'The main row for an individual room or direct-message chat message.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatMessageAvatar',
+    label: 'Message Avatar',
+    description: 'The sender avatar hit target inside each message row.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'chatMessageContent',
+    label: 'Message Content',
+    description: 'The text and rich content column inside each chat message.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatAttachmentCard',
+    label: 'Attachment Card',
+    description: 'Cards that display attachment transfer, preview, request, and download states.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'chatReactionPill',
+    label: 'Reaction Pill',
+    description: 'A compact emoji reaction button under a message.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'chatMessageActions',
+    label: 'Message Actions',
+    description: 'The hover toolbar for reacting, replying, editing, and deleting a message.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatComposerBar',
+    label: 'Composer Bar',
+    description: 'The pinned area that holds reply state, typing indicator, markdown tools, and the message input.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatComposerReplyBar',
+    label: 'Composer Reply Bar',
+    description: 'The reply preview shown above the message composer.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: true,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'chatComposerToolbar',
+    label: 'Composer Toolbar',
+    description: 'The inline markdown formatting toolbar above the composer input.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatComposerInput',
+    label: 'Composer Input',
+    description: 'The textarea region where chat messages are written.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'chatComposerSendButton',
+    label: 'Send Button',
+    description: 'The send action button inside the message composer.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'chatGifPickerSurface',
+    label: 'GIF Picker Surface',
+    description: 'The floating GIF picker container opened from the chat composer.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
   {
     key: 'chatRoomMembersPanel',
     label: 'Members Panel',
@@ -107,25 +390,102 @@ export const THEME_REGISTRY: readonly ThemeRegistryEntry[] = [
     label: 'DM Conversations Panel',
     description: 'The direct-message sidebar showing private chat conversations.',
     category: 'room',
-    container: 'roomLayout',
+    container: 'dmLayout',
     layoutEditable: true,
     pickerVisible: true,
     supportsTextOverride: false,
     supportsLink: false,
     supportsIcon: false
   },
+  {
+    key: 'dmConversationsHeader',
+    label: 'DM Conversations Header',
+    description: 'The header above the direct-message conversations list.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: true,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'dmConversationList',
+    label: 'DM Conversation List',
+    description: 'The scrollable list of direct-message conversations.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'dmConversationItem',
+    label: 'DM Conversation Item',
+    description: 'An individual direct-message conversation row.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'dmVoiceControlsArea',
+    label: 'DM Voice Controls Area',
+    description: 'The voice controls slot at the bottom of the direct-message sidebar.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
   {
     key: 'dmChatPanel',
     label: 'DM Chat Panel',
     description: 'The main direct-message panel that hosts private chat messages.',
     category: 'room',
-    container: 'roomLayout',
+    container: 'dmLayout',
     layoutEditable: true,
     pickerVisible: true,
     supportsTextOverride: false,
     supportsLink: false,
     supportsIcon: false
   },
+  {
+    key: 'dmChatSurface',
+    label: 'DM Chat Surface',
+    description: 'The direct-message chat surface containing the DM header, messages, and composer.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'dmChatHeader',
+    label: 'DM Chat Header',
+    description: 'The header above a direct-message conversation.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: true,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'dmMessageRegion',
+    label: 'DM Message Region',
+    description: 'The absolute region that holds direct-message history and status markers.',
+    category: 'room',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
   {
     key: 'chatRoomEmptyState',
     label: 'Room Empty State',
@@ -148,6 +508,39 @@ export const THEME_REGISTRY: readonly ThemeRegistryEntry[] = [
     supportsLink: false,
     supportsIcon: false
   },
+  {
+    key: 'voiceControlsPanel',
+    label: 'Voice Controls Panel',
+    description: 'The voice connection card embedded in sidebars and direct-message views.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'voiceControlsUserRow',
+    label: 'Voice Controls User Row',
+    description: 'The current-user row inside the voice controls panel.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'voiceControlsButtons',
+    label: 'Voice Controls Buttons',
+    description: 'The mute, deafen, camera, screen-share, and disconnect button group.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
   {
     key: 'floatingVoiceControls',
     label: 'Floating Voice Controls',
@@ -158,6 +551,127 @@ export const THEME_REGISTRY: readonly ThemeRegistryEntry[] = [
     supportsTextOverride: false,
     supportsLink: false,
     supportsIcon: false
+  },
+  {
+    key: 'settingsModalSurface',
+    label: 'Settings Modal Surface',
+    description: 'The main settings modal frame.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'settingsModalNav',
+    label: 'Settings Navigation',
+    description: 'The left navigation column inside Settings.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'settingsModalHeader',
+    label: 'Settings Header',
+    description: 'The title and close-button row at the top of Settings content.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: true,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'settingsModalContent',
+    label: 'Settings Content',
+    description: 'The scrollable settings page content area.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'contextMenuSurface',
+    label: 'Context Menu Surface',
+    description: 'The floating context menu panel used throughout the app.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'confirmDialogSurface',
+    label: 'Confirm Dialog Surface',
+    description: 'The shared confirmation dialog frame.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: true,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'profileCardSurface',
+    label: 'Profile Card Surface',
+    description: 'The user profile popover card.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'profileCardBanner',
+    label: 'Profile Card Banner',
+    description: 'The decorative banner strip at the top of a profile card.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'profileCardBody',
+    label: 'Profile Card Body',
+    description: 'The main text and status content inside a profile card.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: false
+  },
+  {
+    key: 'screenShareSourcePicker',
+    label: 'Screen Share Source Picker',
+    description: 'The dialog for choosing a screen or window to share.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: true,
+    supportsLink: false,
+    supportsIcon: true
+  },
+  {
+    key: 'screenShareSourceCard',
+    label: 'Screen Share Source Card',
+    description: 'An individual screen or window option in the source picker.',
+    category: 'overlay',
+    layoutEditable: false,
+    pickerVisible: true,
+    supportsTextOverride: false,
+    supportsLink: false,
+    supportsIcon: true
   }
 ];
 
@@ -170,13 +684,9 @@ export function findThemeLayoutContainer(key: string): ThemeLayoutContainerDefin
 }
 
 export function getLayoutEditableThemeKeys(): string[] {
-  return THEME_REGISTRY
-    .filter((entry) => entry.layoutEditable)
-    .map((entry) => entry.key);
+  return THEME_REGISTRY.filter((entry) => entry.layoutEditable).map((entry) => entry.key);
 }
 
 export function getPickerVisibleThemeKeys(): string[] {
-  return THEME_REGISTRY
-    .filter((entry) => entry.pickerVisible)
-    .map((entry) => entry.key);
+  return THEME_REGISTRY.filter((entry) => entry.pickerVisible).map((entry) => entry.key);
 }
diff --git a/toju-app/src/app/domains/theme/domain/logic/theme-schema.logic.ts b/toju-app/src/app/domains/theme/domain/logic/theme-schema.logic.ts
index db1a608..6f78d7d 100644
--- a/toju-app/src/app/domains/theme/domain/logic/theme-schema.logic.ts
+++ b/toju-app/src/app/domains/theme/domain/logic/theme-schema.logic.ts
@@ -4,11 +4,16 @@ import {
   ThemeSchemaField
 } from '../models/theme.model';
 
-const RADIAL_GRADIENT_EXAMPLE =
-  'radial-gradient(circle at top, rgba(255,255,255,0.12), '
-  + 'transparent 60%)';
+const RADIAL_GRADIENT_EXAMPLE = 'radial-gradient(circle at top, rgba(255,255,255,0.12), ' + 'transparent 60%)';
 
 export const THEME_TOP_LEVEL_FIELDS: readonly ThemeSchemaField[] = [
+  {
+    key: 'css',
+    description: 'Optional raw CSS applied after the theme JSON is active.',
+    type: 'string',
+    example: '.theme-settings { outline: 1px solid hsl(var(--primary)); }',
+    examples: ['.theme-settings { outline: 1px solid hsl(var(--primary)); }']
+  },
   {
     key: 'meta',
     description: 'Theme metadata used for naming, versioning, and describing the preset.',
@@ -27,8 +32,8 @@ export const THEME_TOP_LEVEL_FIELDS: readonly ThemeSchemaField[] = [
     key: 'layout',
     description: 'Grid layout entries for registered moveable surfaces.',
     type: 'object',
-    example: '{ "chatRoomMainPanel": { "container": "roomLayout", "grid": { "x": 4, "y": 0, "w": 12, "h": 12 } } }',
-    examples: ['{ "chatRoomMainPanel": { "container": "roomLayout", "grid": { "x": 4, "y": 0, "w": 12, "h": 12 } } }']
+    example: '{ "dmChatPanel": { "container": "dmLayout", "grid": { "x": 4, "y": 0, "w": 16, "h": 12 } } }',
+    examples: ['{ "dmChatPanel": { "container": "dmLayout", "grid": { "x": 4, "y": 0, "w": 16, "h": 12 } } }']
   },
   {
     key: 'elements',
@@ -83,7 +88,11 @@ export const THEME_LAYOUT_FIELDS: readonly ThemeSchemaField[] = [
     description: 'The registered layout container that owns this grid item.',
     type: 'string',
     example: 'roomLayout',
-    examples: ['appShell', 'roomLayout']
+    examples: [
+      'appShell',
+      'roomLayout',
+      'dmLayout'
+    ]
   },
   {
     key: 'grid',
@@ -384,10 +393,14 @@ export const THEME_ELEMENT_STYLE_FIELDS: readonly ThemeSchemaField<ThemeElementS
   },
   {
     key: 'backgroundImage',
-    description: 'CSS background image or image URL.',
+    description: 'CSS background-image value, local image path, or http/https image URL.',
     type: 'string',
-    example: "url('/assets/themes/paper-noise.png')",
-    examples: ["url('/assets/themes/paper-noise.png')", "url('https://example.com/bg.jpg')"]
+    example: '/assets/themes/paper-noise.png',
+    examples: [
+      '/assets/themes/paper-noise.png',
+      'https://example.com/bg.jpg',
+      "url('/assets/themes/paper-noise.png')"
+    ]
   },
   {
     key: 'backgroundSize',
@@ -497,10 +510,7 @@ export function getSuggestedValueOptions(
   return findThemeElementStyleField(field)?.examples ?? [];
 }
 
-export function getSuggestedFieldDefault(
-  field: ThemeElementStyleProperty,
-  animationKeys: readonly string[] = []
-): string | number {
+export function getSuggestedFieldDefault(field: ThemeElementStyleProperty, animationKeys: readonly string[] = []): string | number {
   return getSuggestedValueOptions(field, animationKeys)[0] ?? '';
 }
 
diff --git a/toju-app/src/app/domains/theme/domain/logic/theme-validation.logic.ts b/toju-app/src/app/domains/theme/domain/logic/theme-validation.logic.ts
index 933db0e..7876389 100644
--- a/toju-app/src/app/domains/theme/domain/logic/theme-validation.logic.ts
+++ b/toju-app/src/app/domains/theme/domain/logic/theme-validation.logic.ts
@@ -1,11 +1,14 @@
 import {
   ThemeAnimationDefinition,
+  ThemeContainerKey,
   ThemeDocument,
   ThemeElementStyleProperty,
   ThemeElementStyles,
+  ThemeGridRect,
+  ThemeLayoutEntry,
   ThemeValidationResult
 } from '../models/theme.model';
-import { createDefaultThemeDocument } from './theme-defaults.logic';
+import { createDefaultThemeDocument, createDefaultThemeLayout } from './theme-defaults.logic';
 import {
   THEME_LAYOUT_CONTAINERS,
   THEME_REGISTRY,
@@ -13,6 +16,7 @@ import {
 } from './theme-registry.logic';
 
 const TOP_LEVEL_KEYS = [
+  'css',
   'meta',
   'tokens',
   'layout',
@@ -103,12 +107,7 @@ function isPlainObject(value: unknown): value is Record<string, unknown> {
   return !!value && typeof value === 'object' && !Array.isArray(value);
 }
 
-function validateUnknownKeys(
-  value: Record<string, unknown>,
-  allowedKeys: readonly string[],
-  path: string,
-  errors: string[]
-): void {
+function validateUnknownKeys(value: Record<string, unknown>, allowedKeys: readonly string[], path: string, errors: string[]): void {
   for (const key of Object.keys(value)) {
     if (!allowedKeys.includes(key)) {
       errors.push(`${path}.${key} is not part of the supported theme schema.`);
@@ -130,12 +129,7 @@ function validateString(value: unknown, path: string, errors: string[], allowEmp
   return true;
 }
 
-function validateEnum<T extends readonly string[]>(
-  value: unknown,
-  allowedValues: T,
-  path: string,
-  errors: string[]
-): value is T[number] {
+function validateEnum<T extends readonly string[]>(value: unknown, allowedValues: T, path: string, errors: string[]): value is T[number] {
   if (typeof value !== 'string' || !allowedValues.includes(value)) {
     errors.push(`${path} must be one of: ${allowedValues.join(', ')}.`);
     return false;
@@ -144,13 +138,7 @@ function validateEnum<T extends readonly string[]>(
   return true;
 }
 
-function validateInteger(
-  value: unknown,
-  path: string,
-  errors: string[],
-  minimum: number,
-  allowZero: boolean
-): value is number {
+function validateInteger(value: unknown, path: string, errors: string[], minimum: number, allowZero: boolean): value is number {
   if (typeof value !== 'number' || !Number.isInteger(value)) {
     errors.push(`${path} must be an integer.`);
     return false;
@@ -164,13 +152,7 @@ function validateInteger(
   return true;
 }
 
-function validateNumberRange(
-  value: unknown,
-  path: string,
-  errors: string[],
-  minimum: number,
-  maximum: number
-): value is number {
+function validateNumberRange(value: unknown, path: string, errors: string[], minimum: number, maximum: number): value is number {
   if (typeof value !== 'number' || Number.isNaN(value)) {
     errors.push(`${path} must be a number.`);
     return false;
@@ -305,49 +287,56 @@ function validateAnimationDefinition(value: unknown, path: string, errors: strin
   return true;
 }
 
-function normaliseThemeDocument(input: Partial<ThemeDocument>): ThemeDocument {
-  const document = createDefaultThemeDocument();
+function normaliseThemeDocument(input: Record<string, unknown>): ThemeDocument {
+  const defaults = createDefaultThemeDocument();
+  const meta = isPlainObject(input['meta']) ? input['meta'] : {};
+  const tokens = isPlainObject(input['tokens']) ? input['tokens'] : {};
+  const layout = isPlainObject(input['layout']) ? input['layout'] : {};
 
-  document.meta = {
-    ...document.meta,
-    ...input.meta
+  return {
+    css: typeof input['css'] === 'string' ? input['css'] : '',
+    meta: {
+      name: typeof meta['name'] === 'string' ? meta['name'] : defaults.meta.name,
+      version: typeof meta['version'] === 'string' ? meta['version'] : defaults.meta.version,
+      description: typeof meta['description'] === 'string' ? meta['description'] : defaults.meta.description
+    },
+    tokens: {
+      colors: isPlainObject(tokens['colors']) ? (tokens['colors'] as Record<string, string>) : {},
+      spacing: isPlainObject(tokens['spacing']) ? (tokens['spacing'] as Record<string, string>) : {},
+      radii: isPlainObject(tokens['radii']) ? (tokens['radii'] as Record<string, string>) : {},
+      effects: isPlainObject(tokens['effects']) ? (tokens['effects'] as Record<string, string>) : {}
+    },
+    layout: normaliseThemeLayout(layout, createDefaultThemeLayout()),
+    elements: isPlainObject(input['elements']) ? (input['elements'] as Record<string, ThemeElementStyles>) : {},
+    animations: isPlainObject(input['animations']) ? (input['animations'] as Record<string, ThemeAnimationDefinition>) : {}
   };
+}
 
-  document.tokens = {
-    colors: {
-      ...document.tokens.colors,
-      ...(input.tokens?.colors ?? {})
-    },
-    spacing: {
-      ...document.tokens.spacing,
-      ...(input.tokens?.spacing ?? {})
-    },
-    radii: {
-      ...document.tokens.radii,
-      ...(input.tokens?.radii ?? {})
-    },
-    effects: {
-      ...document.tokens.effects,
-      ...(input.tokens?.effects ?? {})
+function normaliseThemeLayout(input: Record<string, unknown>, defaults: Record<string, ThemeLayoutEntry>): Record<string, ThemeLayoutEntry> {
+  const layout: Record<string, ThemeLayoutEntry> = {};
+
+  for (const [key, value] of Object.entries(input)) {
+    if (!isPlainObject(value)) {
+      continue;
     }
-  };
 
-  document.layout = {
-    ...document.layout,
-    ...(input.layout ?? {})
-  };
+    const defaultEntry = defaults[key];
+    const grid = isPlainObject(value['grid']) ? (value['grid'] as Partial<ThemeGridRect>) : {};
 
-  document.elements = {
-    ...document.elements,
-    ...(input.elements ?? {})
-  };
+    if (!defaultEntry) {
+      continue;
+    }
 
-  document.animations = {
-    ...document.animations,
-    ...(input.animations ?? {})
-  };
+    layout[key] = {
+      container: typeof value['container'] === 'string' ? (value['container'] as ThemeContainerKey) : defaultEntry.container,
+      grid: {
+        ...defaultEntry.grid,
+        ...grid
+      }
+    };
+  }
 
-  return document;
+  return layout;
 }
 
 export function validateThemeDocument(input: unknown): ThemeValidationResult {
@@ -363,14 +352,24 @@ export function validateThemeDocument(input: unknown): ThemeValidationResult {
 
   validateUnknownKeys(input, TOP_LEVEL_KEYS, 'theme', errors);
 
+  if (input['css'] !== undefined) {
+    validateString(input['css'], 'theme.css', errors, true);
+  }
+
   const meta = input['meta'];
 
-  if (!isPlainObject(meta)) {
+  if (meta !== undefined && !isPlainObject(meta)) {
     errors.push('theme.meta must be an object.');
-  } else {
+  } else if (isPlainObject(meta)) {
     validateUnknownKeys(meta, META_KEYS, 'theme.meta', errors);
-    validateString(meta['name'], 'theme.meta.name', errors);
-    validateString(meta['version'], 'theme.meta.version', errors);
+
+    if (meta['name'] !== undefined) {
+      validateString(meta['name'], 'theme.meta.name', errors);
+    }
+
+    if (meta['version'] !== undefined) {
+      validateString(meta['version'], 'theme.meta.version', errors);
+    }
 
     if (meta['description'] !== undefined) {
       validateString(meta['description'], 'theme.meta.description', errors, true);
@@ -492,6 +491,6 @@ export function validateThemeDocument(input: unknown): ThemeValidationResult {
   return {
     valid: true,
     errors: [],
-    value: normaliseThemeDocument(input as Partial<ThemeDocument>)
+    value: normaliseThemeDocument(input)
   };
 }
diff --git a/toju-app/src/app/domains/theme/domain/models/theme.model.ts b/toju-app/src/app/domains/theme/domain/models/theme.model.ts
index c3d049c..eda0274 100644
--- a/toju-app/src/app/domains/theme/domain/models/theme.model.ts
+++ b/toju-app/src/app/domains/theme/domain/models/theme.model.ts
@@ -1,4 +1,4 @@
-export type ThemeContainerKey = 'appShell' | 'roomLayout';
+export type ThemeContainerKey = 'appShell' | 'roomLayout' | 'dmLayout';
 
 export interface ThemeMeta {
   name: string;
@@ -70,6 +70,7 @@ export interface ThemeAnimationDefinition {
 }
 
 export interface ThemeDocument {
+  css: string;
   meta: ThemeMeta;
   tokens: ThemeTokenGroups;
   layout: Record<string, ThemeLayoutEntry>;
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.html b/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.html
index dc3996d..9bf9566 100644
--- a/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.html
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.html
@@ -15,11 +15,18 @@
     class="theme-grid-editor__frame relative overflow-hidden rounded-lg border border-border/80"
     [ngStyle]="frameStyle()"
   >
-    <div class="theme-grid-editor__grid"></div>
+    <div
+      class="theme-grid-editor__grid"
+      [ngStyle]="frameStyle()"
+    >
+      @for (cell of gridCells(); track cell) {
+        <div class="theme-grid-editor__cell"></div>
+      }
+    </div>
 
     @for (item of items(); track item.key) {
       <div
-        class="theme-grid-editor__item absolute"
+        class="theme-grid-editor__item"
         [class.theme-grid-editor__item--selected]="selectedKey() === item.key"
         [class.theme-grid-editor__item--disabled]="disabled()"
         [ngStyle]="itemStyle(item)"
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.scss b/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.scss
index 3a02646..306a0e7 100644
--- a/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.scss
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.scss
@@ -3,6 +3,7 @@
 }
 
 .theme-grid-editor__frame {
+  display: grid;
   aspect-ratio: 16 / 9;
   background:
     radial-gradient(circle at top, hsl(var(--primary) / 0.05), transparent 45%),
@@ -12,15 +13,18 @@
 .theme-grid-editor__grid {
   position: absolute;
   inset: 0;
-  background-image:
-    linear-gradient(to right, hsl(var(--border) / 0.65) 1px, transparent 1px),
-    linear-gradient(to bottom, hsl(var(--border) / 0.65) 1px, transparent 1px);
-  background-size:
-    calc(100% / var(--theme-grid-columns)) calc(100% / var(--theme-grid-rows)),
-    calc(100% / var(--theme-grid-columns)) calc(100% / var(--theme-grid-rows));
+  display: grid;
+  pointer-events: none;
+}
+
+.theme-grid-editor__cell {
+  border-top: 1px solid hsl(var(--border) / 0.65);
+  border-left: 1px solid hsl(var(--border) / 0.65);
 }
 
 .theme-grid-editor__item {
+  position: relative;
+  z-index: 1;
   padding: 0.35rem;
 }
 
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.ts b/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.ts
index 49c4dc4..de7272c 100644
--- a/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.ts
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-grid-editor/theme-grid-editor.component.ts
@@ -45,8 +45,11 @@ export class ThemeGridEditorComponent {
   readonly canvasRef = viewChild.required<ElementRef<HTMLElement>>('canvasRef');
   readonly frameStyle = computed(() => ({
     '--theme-grid-columns': `${this.container().columns}`,
-    '--theme-grid-rows': `${this.container().rows}`
+    '--theme-grid-rows': `${this.container().rows}`,
+    gridTemplateColumns: this.container().templateColumns ?? `repeat(${this.container().columns}, minmax(0, 1fr))`,
+    gridTemplateRows: this.container().templateRows ?? `repeat(${this.container().rows}, minmax(0, 1fr))`
   }));
+  readonly gridCells = computed(() => Array.from({ length: this.container().columns * this.container().rows }, (_, index) => index));
 
   private readonly host = inject<ElementRef<HTMLElement>>(ElementRef);
   private dragState: DragState | null = null;
@@ -57,11 +60,8 @@ export class ThemeGridEditorComponent {
       return;
     }
 
-    const canvasRect = this.canvasRef().nativeElement.getBoundingClientRect();
-    const columnWidth = canvasRect.width / this.container().columns;
-    const rowHeight = canvasRect.height / this.container().rows;
-    const deltaColumns = Math.round((event.clientX - this.dragState.startClientX) / columnWidth);
-    const deltaRows = Math.round((event.clientY - this.dragState.startClientY) / rowHeight);
+    const deltaColumns = this.gridDelta('columns', this.dragState.startClientX, event.clientX);
+    const deltaRows = this.gridDelta('rows', this.dragState.startClientY, event.clientY);
     const nextGrid = { ...this.dragState.startGrid };
 
     if (this.dragState.mode === 'move') {
@@ -90,13 +90,9 @@ export class ThemeGridEditorComponent {
   }
 
   itemStyle(item: ThemeGridEditorItem): Record<string, string> {
-    const { columns, rows } = this.container();
-
     return {
-      left: `${(item.grid.x / columns) * 100}%`,
-      top: `${(item.grid.y / rows) * 100}%`,
-      width: `${(item.grid.w / columns) * 100}%`,
-      height: `${(item.grid.h / rows) * 100}%`
+      gridColumn: `${item.grid.x + 1} / span ${item.grid.w}`,
+      gridRow: `${item.grid.y + 1} / span ${item.grid.h}`
     };
   }
 
@@ -132,4 +128,61 @@ export class ThemeGridEditorComponent {
   private clamp(value: number, minimum: number, maximum: number): number {
     return Math.min(Math.max(value, minimum), maximum);
   }
+
+  private gridDelta(axis: 'columns' | 'rows', startClientPosition: number, currentClientPosition: number): number {
+    const canvasRect = this.canvasRef().nativeElement.getBoundingClientRect();
+    const linePositions = this.measureGridLines(axis, canvasRect);
+    const startOffset = startClientPosition - (axis === 'columns' ? canvasRect.left : canvasRect.top);
+    const currentOffset = currentClientPosition - (axis === 'columns' ? canvasRect.left : canvasRect.top);
+
+    return this.nearestGridLineIndex(currentOffset, linePositions) - this.nearestGridLineIndex(startOffset, linePositions);
+  }
+
+  private measureGridLines(axis: 'columns' | 'rows', canvasRect: DOMRect): number[] {
+    const canvas = this.canvasRef().nativeElement;
+    const computedStyles = getComputedStyle(canvas);
+    const expectedTracks = axis === 'columns' ? this.container().columns : this.container().rows;
+    const availableSize = axis === 'columns' ? canvasRect.width : canvasRect.height;
+    const template = axis === 'columns' ? computedStyles.gridTemplateColumns : computedStyles.gridTemplateRows;
+    const trackSizes = template
+      .split(/\s+/)
+      .map((track) => Number.parseFloat(track))
+      .filter((size) => Number.isFinite(size) && size > 0);
+
+    if (trackSizes.length !== expectedTracks) {
+      return Array.from({ length: expectedTracks + 1 }, (_, index) => (availableSize / expectedTracks) * index);
+    }
+
+    const totalTrackSize = trackSizes.reduce((sum, size) => sum + size, 0);
+    const scale = totalTrackSize > 0 ? availableSize / totalTrackSize : 1;
+    const linePositions = [0];
+
+    for (const trackSize of trackSizes) {
+      const previousLinePosition = linePositions[linePositions.length - 1] ?? 0;
+
+      linePositions.push(previousLinePosition + trackSize * scale);
+    }
+
+    linePositions[linePositions.length - 1] = availableSize;
+
+    return linePositions;
+  }
+
+  private nearestGridLineIndex(offset: number, linePositions: number[]): number {
+    const clampedOffset = this.clamp(offset, linePositions[0] ?? 0, linePositions.at(-1) ?? 0);
+
+    let nearestIndex = 0;
+    let nearestDistance = Number.POSITIVE_INFINITY;
+
+    for (let index = 0; index < linePositions.length; index++) {
+      const distance = Math.abs(linePositions[index] - clampedOffset);
+
+      if (distance < nearestDistance) {
+        nearestDistance = distance;
+        nearestIndex = index;
+      }
+    }
+
+    return nearestIndex;
+  }
 }
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-code-editor.component.ts b/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-code-editor.component.ts
index 2f0dfbc..6e96489 100644
--- a/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-code-editor.component.ts
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-code-editor.component.ts
@@ -11,75 +11,149 @@ import {
   viewChild
 } from '@angular/core';
 import { indentWithTab } from '@codemirror/commands';
-import { json } from '@codemirror/lang-json';
-import { indentUnit } from '@codemirror/language';
-import { EditorSelection, EditorState } from '@codemirror/state';
+import { css } from '@codemirror/lang-css';
+import { json, jsonParseLinter } from '@codemirror/lang-json';
+import { indentUnit, syntaxTree } from '@codemirror/language';
+import {
+  Diagnostic,
+  lintGutter,
+  linter
+} from '@codemirror/lint';
+import {
+  EditorSelection,
+  EditorState,
+  Extension
+} from '@codemirror/state';
 import { oneDark } from '@codemirror/theme-one-dark';
 import { EditorView, keymap } from '@codemirror/view';
 import { basicSetup } from 'codemirror';
 
-const THEME_JSON_EDITOR_THEME = EditorView.theme({
-  '&': {
-    height: '100%',
-    backgroundColor: 'transparent',
-    color: '#e7eef9'
+import { formatPastedJsonText } from './theme-json-format.logic';
+
+type ThemeCodeEditorLanguage = 'json' | 'css';
+
+const ERROR_SQUIGGLE_BACKGROUND =
+  'linear-gradient(45deg, transparent 65%, #fb7185 65%, #fb7185 80%, transparent 80%), '
+  + 'linear-gradient(135deg, transparent 65%, #fb7185 65%, #fb7185 80%, transparent 80%)';
+const THEME_JSON_EDITOR_THEME = EditorView.theme(
+  {
+    '&': {
+      height: '100%',
+      backgroundColor: 'transparent',
+      color: '#e7eef9'
+    },
+    '&.cm-focused': {
+      outline: 'none'
+    },
+    '.cm-scroller': {
+      overflow: 'auto',
+      fontFamily: "'IBM Plex Mono', 'JetBrains Mono', 'Fira Code', monospace",
+      lineHeight: '1.55'
+    },
+    '.cm-content': {
+      minHeight: '100%',
+      padding: '1rem 0',
+      caretColor: '#f8fafc'
+    },
+    '.cm-line': {
+      padding: '0 1rem 0 0.5rem'
+    },
+    '.cm-cursor, .cm-dropCursor': {
+      borderLeftColor: '#f8fafc'
+    },
+    '.cm-gutters': {
+      minHeight: '100%',
+      borderRight: '1px solid #2f405c',
+      backgroundColor: '#172033',
+      color: '#7b8aa5'
+    },
+    '.cm-activeLine': {
+      backgroundColor: 'rgb(148 163 184 / 0.08)'
+    },
+    '.cm-activeLineGutter': {
+      backgroundColor: 'rgb(148 163 184 / 0.12)',
+      color: '#d7e2f2'
+    },
+    '.cm-selectionBackground, &.cm-focused .cm-selectionBackground, ::selection': {
+      backgroundColor: 'rgb(96 165 250 / 0.22)'
+    },
+    '.cm-panels': {
+      backgroundColor: '#111827',
+      color: '#e5eefc',
+      borderBottom: '1px solid #2f405c'
+    },
+    '.cm-searchMatch': {
+      backgroundColor: 'rgb(250 204 21 / 0.18)',
+      outline: '1px solid rgb(250 204 21 / 0.32)'
+    },
+    '.cm-searchMatch.cm-searchMatch-selected': {
+      backgroundColor: 'rgb(250 204 21 / 0.28)'
+    },
+    '.cm-tooltip': {
+      border: '1px solid #314158',
+      backgroundColor: '#111827'
+    },
+    '.cm-tooltip-autocomplete ul li[aria-selected]': {
+      backgroundColor: 'rgb(96 165 250 / 0.18)',
+      color: '#f8fafc'
+    },
+    '.cm-diagnosticRange-error': {
+      backgroundImage: ERROR_SQUIGGLE_BACKGROUND,
+      backgroundPosition: '0 100%',
+      backgroundRepeat: 'repeat-x',
+      backgroundSize: '8px 3px',
+      paddingBottom: '2px'
+    },
+    '.cm-lintRange-error': {
+      backgroundImage: ERROR_SQUIGGLE_BACKGROUND,
+      backgroundPosition: '0 100%',
+      backgroundRepeat: 'repeat-x',
+      backgroundSize: '8px 3px',
+      paddingBottom: '2px'
+    },
+    '.cm-lintPoint-error:after': {
+      borderBottomColor: '#fb7185'
+    },
+    '.cm-diagnostic': {
+      fontFamily: 'Inter, system-ui, sans-serif'
+    },
+    '.cm-diagnostic-error': {
+      borderLeftColor: '#fb7185'
+    }
   },
-  '&.cm-focused': {
-    outline: 'none'
-  },
-  '.cm-scroller': {
-    overflow: 'auto',
-    fontFamily: "'IBM Plex Mono', 'JetBrains Mono', 'Fira Code', monospace",
-    lineHeight: '1.55'
-  },
-  '.cm-content': {
-    minHeight: '100%',
-    padding: '1rem 0',
-    caretColor: '#f8fafc'
-  },
-  '.cm-line': {
-    padding: '0 1rem 0 0.5rem'
-  },
-  '.cm-cursor, .cm-dropCursor': {
-    borderLeftColor: '#f8fafc'
-  },
-  '.cm-gutters': {
-    minHeight: '100%',
-    borderRight: '1px solid #2f405c',
-    backgroundColor: '#172033',
-    color: '#7b8aa5'
-  },
-  '.cm-activeLine': {
-    backgroundColor: 'rgb(148 163 184 / 0.08)'
-  },
-  '.cm-activeLineGutter': {
-    backgroundColor: 'rgb(148 163 184 / 0.12)',
-    color: '#d7e2f2'
-  },
-  '.cm-selectionBackground, &.cm-focused .cm-selectionBackground, ::selection': {
-    backgroundColor: 'rgb(96 165 250 / 0.22)'
-  },
-  '.cm-panels': {
-    backgroundColor: '#111827',
-    color: '#e5eefc',
-    borderBottom: '1px solid #2f405c'
-  },
-  '.cm-searchMatch': {
-    backgroundColor: 'rgb(250 204 21 / 0.18)',
-    outline: '1px solid rgb(250 204 21 / 0.32)'
-  },
-  '.cm-searchMatch.cm-searchMatch-selected': {
-    backgroundColor: 'rgb(250 204 21 / 0.28)'
-  },
-  '.cm-tooltip': {
-    border: '1px solid #314158',
-    backgroundColor: '#111827'
-  },
-  '.cm-tooltip-autocomplete ul li[aria-selected]': {
-    backgroundColor: 'rgb(96 165 250 / 0.18)',
-    color: '#f8fafc'
+  { dark: true }
+);
+
+function getLanguageExtensions(language: ThemeCodeEditorLanguage): Extension[] {
+  if (language === 'css') {
+    return [css(), linter(cssSyntaxLinter, { delay: 250 })];
   }
-}, { dark: true });
+
+  return [json(), linter(jsonParseLinter(), { delay: 250 })];
+}
+
+function cssSyntaxLinter(view: EditorView): Diagnostic[] {
+  const diagnostics: Diagnostic[] = [];
+  const documentLength = view.state.doc.length;
+
+  syntaxTree(view.state).iterate({
+    enter: (node) => {
+      if (!node.type.isError) {
+        return;
+      }
+
+      diagnostics.push({
+        from: node.from,
+        to: Math.max(node.to, Math.min(node.from + 1, documentLength)),
+        severity: 'error',
+        source: 'CSS',
+        message: 'CSS syntax error.'
+      });
+    }
+  });
+
+  return diagnostics;
+}
 
 @Component({
   selector: 'app-theme-json-code-editor',
@@ -91,9 +165,10 @@ export class ThemeJsonCodeEditorComponent implements OnDestroy {
   readonly editorHostRef = viewChild<ElementRef<HTMLDivElement>>('editorHostRef');
   readonly value = input.required<string>();
   readonly fullscreen = input(false);
+  readonly language = input<ThemeCodeEditorLanguage>('json');
   readonly valueChange = output<string>();
 
-  readonly editorMinHeight = computed(() => this.fullscreen() ? 'max(34rem, calc(100vh - 15rem))' : '28rem');
+  readonly editorMinHeight = computed(() => (this.fullscreen() ? 'max(34rem, calc(100vh - 15rem))' : '28rem'));
 
   private readonly zone = inject(NgZone);
 
@@ -173,6 +248,8 @@ export class ThemeJsonCodeEditorComponent implements OnDestroy {
 
   private createEditor(host: HTMLDivElement): void {
     this.zone.runOutsideAngular(() => {
+      const language = this.language();
+
       this.editorView = new EditorView({
         state: EditorState.create({
           doc: this.value(),
@@ -180,7 +257,8 @@ export class ThemeJsonCodeEditorComponent implements OnDestroy {
             basicSetup,
             keymap.of([indentWithTab]),
             indentUnit.of('  '),
-            json(),
+            ...getLanguageExtensions(language),
+            lintGutter(),
             oneDark,
             THEME_JSON_EDITOR_THEME,
             EditorState.tabSize.of(2),
@@ -188,7 +266,25 @@ export class ThemeJsonCodeEditorComponent implements OnDestroy {
               spellcheck: 'false',
               autocapitalize: 'off',
               autocorrect: 'off',
-              'aria-label': 'Theme JSON editor'
+              'aria-label': language === 'css' ? 'Theme CSS editor' : 'Theme JSON editor'
+            }),
+            EditorView.domEventHandlers({
+              paste: (event, view) => {
+                if (language !== 'json') {
+                  return false;
+                }
+
+                const pastedText = event.clipboardData?.getData('application/json') || event.clipboardData?.getData('text/plain') || '';
+                const formattedText = formatPastedJsonText(pastedText);
+
+                if (!formattedText) {
+                  return false;
+                }
+
+                event.preventDefault();
+                view.dispatch(view.state.replaceSelection(formattedText));
+                return true;
+              }
             }),
             EditorView.updateListener.of((update) => {
               if (!update.docChanged || this.isApplyingExternalValue) {
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-format.logic.spec.ts b/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-format.logic.spec.ts
new file mode 100644
index 0000000..8c1a013
--- /dev/null
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-format.logic.spec.ts
@@ -0,0 +1,24 @@
+import { formatPastedJsonText } from './theme-json-format.logic';
+
+describe('theme JSON paste formatting', () => {
+  it('formats pasted JSON with two-space indentation', () => {
+    expect(formatPastedJsonText('{"meta":{"name":"Paste","version":"1"},"tokens":{"colors":{"background":"1 2% 3%"}}}')).toBe([
+      '{',
+      '  "meta": {',
+      '    "name": "Paste",',
+      '    "version": "1"',
+      '  },',
+      '  "tokens": {',
+      '    "colors": {',
+      '      "background": "1 2% 3%"',
+      '    }',
+      '  }',
+      '}'
+    ].join('\n'));
+  });
+
+  it('leaves non-JSON paste content to the editor default', () => {
+    expect(formatPastedJsonText('backgroundColor: red')).toBeNull();
+    expect(formatPastedJsonText('')).toBeNull();
+  });
+});
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-format.logic.ts b/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-format.logic.ts
new file mode 100644
index 0000000..7dade22
--- /dev/null
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-json-code-editor/theme-json-format.logic.ts
@@ -0,0 +1,13 @@
+export function formatPastedJsonText(text: string): string | null {
+  const trimmedText = text.trim();
+
+  if (!trimmedText) {
+    return null;
+  }
+
+  try {
+    return JSON.stringify(JSON.parse(trimmedText) as unknown, null, 2);
+  } catch {
+    return null;
+  }
+}
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.html b/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.html
index fd8940b..d12fda8 100644
--- a/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.html
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.html
@@ -26,6 +26,13 @@
         >
           Format JSON
         </button>
+        <button
+          type="button"
+          (click)="jumpToCss()"
+          class="inline-flex items-center rounded-md border border-border bg-secondary px-3 py-1.5 text-sm font-medium text-foreground transition-colors hover:bg-secondary/80"
+        >
+          Open CSS
+        </button>
         <button
           type="button"
           (click)="copyLlmThemeGuide()"
@@ -33,13 +40,35 @@
         >
           Copy LLM Guide
         </button>
+        <button
+          type="button"
+          (click)="themeFileInput.click()"
+          class="inline-flex items-center rounded-md border border-border bg-secondary px-3 py-1.5 text-sm font-medium text-foreground transition-colors hover:bg-secondary/80"
+        >
+          Import File
+        </button>
+        <button
+          type="button"
+          (click)="exportThemeFile()"
+          [disabled]="!draftIsValid()"
+          class="inline-flex items-center rounded-md border border-border bg-secondary px-3 py-1.5 text-sm font-medium text-foreground transition-colors hover:bg-secondary/80 disabled:cursor-not-allowed disabled:opacity-60"
+        >
+          Export File
+        </button>
+        <input
+          #themeFileInput
+          type="file"
+          accept=".json,.css,application/json,text/css"
+          class="hidden"
+          (change)="importThemeFile($event)"
+        />
         <button
           type="button"
           (click)="applyDraft()"
           [disabled]="!draftIsValid()"
           class="inline-flex items-center rounded-md bg-primary px-4 py-1.5 text-sm font-semibold text-primary-foreground transition-colors hover:bg-primary/90 disabled:cursor-not-allowed disabled:opacity-60"
         >
-          Apply Draft
+          {{ activeEditorTab() === 'cssOnly' ? 'Apply CSS Theme' : 'Apply Draft' }}
         </button>
         <button
           type="button"
@@ -59,24 +88,8 @@
 
     <div class="theme-settings__hero-grid mt-4">
       <div class="theme-settings__hero-stat">
-        <div class="theme-settings__workspace-selector theme-settings__workspace-selector--compact">
-          <label
-            for="theme-studio-workspace-select"
-            class="theme-settings__workspace-selector-label"
-          >
-            Workspace
-          </label>
-          <select
-            id="theme-studio-workspace-select"
-            class="theme-settings__workspace-select"
-            [value]="activeWorkspace()"
-            (change)="onWorkspaceSelect($event)"
-          >
-            @for (workspace of workspaceTabs; track workspace.key) {
-              <option [value]="workspace.key">{{ workspace.label }}</option>
-            }
-          </select>
-        </div>
+        <span class="theme-settings__hero-label">Workspace</span>
+        <strong class="theme-settings__hero-value">{{ activeWorkspaceInfo().label }}</strong>
       </div>
       <div class="theme-settings__hero-stat">
         <span class="theme-settings__hero-label">Regions</span>
@@ -110,6 +123,43 @@
         </ul>
       </div>
     }
+
+    <nav
+      class="theme-settings__workspace-tabs mt-4"
+      aria-label="Theme Studio workspace"
+    >
+      @for (workspace of workspaceTabs; track workspace.key) {
+        <button
+          type="button"
+          (click)="setWorkspace(workspace.key)"
+          class="theme-settings__workspace-tab"
+          [class.theme-settings__workspace-tab--active]="activeWorkspace() === workspace.key"
+          [attr.aria-current]="activeWorkspace() === workspace.key ? 'page' : null"
+        >
+          <span class="theme-settings__workspace-tab-label">{{ workspace.label }}</span>
+          <span class="theme-settings__workspace-tab-description">{{ workspace.description }}</span>
+        </button>
+      }
+    </nav>
+
+    <div class="theme-settings__workspace-selector theme-settings__workspace-selector--mobile mt-4">
+      <label
+        for="theme-studio-workspace-select"
+        class="theme-settings__workspace-selector-label"
+      >
+        Workspace
+      </label>
+      <select
+        id="theme-studio-workspace-select"
+        class="theme-settings__workspace-select"
+        [value]="activeWorkspace()"
+        (change)="onWorkspaceSelect($event)"
+      >
+        @for (workspace of workspaceTabs; track workspace.key) {
+          <option [value]="workspace.key">{{ workspace.label }}</option>
+        }
+      </select>
+    </div>
   </section>
 
   <div class="theme-settings__workspace min-h-0 flex-1">
@@ -222,7 +272,7 @@
         </section>
       }
 
-      <section class="theme-studio-card p-3.5">
+      <section class="theme-studio-card theme-settings__explorer-card p-3.5">
         <div class="flex items-center justify-between gap-3">
           <p class="text-sm font-semibold text-foreground">Explorer</p>
           <span class="rounded-full bg-secondary px-2.5 py-1 text-[11px] font-medium text-muted-foreground">
@@ -240,7 +290,7 @@
           />
         </div>
 
-        <div class="theme-settings__entry-list mt-4">
+        <div class="theme-settings__entry-list theme-settings__explorer-list mt-4">
           @for (entry of filteredEntries(); track entry.key) {
             <button
               type="button"
@@ -318,23 +368,70 @@
       @if (activeWorkspace() === 'editor') {
         <section class="theme-studio-card theme-settings__editor-card p-4">
           <div class="flex flex-wrap items-start justify-between gap-4 border-b border-border pb-3">
-            <p class="text-sm font-semibold text-foreground">Theme JSON</p>
+            <div class="min-w-0">
+              <p class="text-sm font-semibold text-foreground">
+                {{ activeEditorTab() === 'cssOnly' ? 'CSS-Only Theme' : 'Theme JSON' }}
+              </p>
+              @if (activeEditorTab() === 'cssOnly') {
+                <p class="mt-1 text-xs leading-5 text-muted-foreground">CSS here is applied over the built-in default JSON theme.</p>
+              }
+            </div>
 
             <div class="flex flex-wrap gap-2 text-[11px] font-medium text-muted-foreground">
-              <span class="rounded-md bg-secondary px-2.5 py-1">{{ draftLineCount() }} lines</span>
-              <span class="rounded-md bg-secondary px-2.5 py-1">{{ draftCharacterCount() }} chars</span>
-              <span class="rounded-md bg-secondary px-2.5 py-1">{{ draftErrorCount() }} errors</span>
+              <span class="rounded-md bg-secondary px-2.5 py-1"
+                >{{ activeEditorTab() === 'cssOnly' ? cssOnlyText().split('\n').length : draftLineCount() }} lines</span
+              >
+              <span class="rounded-md bg-secondary px-2.5 py-1"
+                >{{ activeEditorTab() === 'cssOnly' ? cssOnlyText().length : draftCharacterCount() }} chars</span
+              >
+              @if (activeEditorTab() === 'json') {
+                <span class="rounded-md bg-secondary px-2.5 py-1">{{ draftErrorCount() }} errors</span>
+              }
               <span class="rounded-md bg-slate-900 px-2.5 py-1 text-slate-200">IDE editor</span>
             </div>
           </div>
 
+          <div class="mt-3 flex flex-wrap gap-2">
+            <button
+              type="button"
+              (click)="setEditorTab('json')"
+              class="rounded-md border border-border bg-secondary px-3 py-1.5 text-xs font-medium text-foreground transition-colors hover:bg-secondary/80"
+              [class.border-primary/40]="activeEditorTab() === 'json'"
+              [class.bg-primary/10]="activeEditorTab() === 'json'"
+              [attr.aria-current]="activeEditorTab() === 'json' ? 'page' : null"
+            >
+              JSON Theme
+            </button>
+            <button
+              type="button"
+              (click)="setEditorTab('cssOnly')"
+              class="rounded-md border border-border bg-secondary px-3 py-1.5 text-xs font-medium text-foreground transition-colors hover:bg-secondary/80"
+              [class.border-primary/40]="activeEditorTab() === 'cssOnly'"
+              [class.bg-primary/10]="activeEditorTab() === 'cssOnly'"
+              [attr.aria-current]="activeEditorTab() === 'cssOnly' ? 'page' : null"
+            >
+              CSS Only
+            </button>
+          </div>
+
           <div class="theme-settings__editor-panel pt-3">
-            <app-theme-json-code-editor
-              #jsonEditorRef
-              [value]="draftText()"
-              [fullscreen]="isFullscreen()"
-              (valueChange)="onDraftEditorValueChange($event)"
-            />
+            @if (activeEditorTab() === 'json') {
+              <app-theme-json-code-editor
+                #jsonEditorRef
+                [value]="draftText()"
+                [fullscreen]="isFullscreen()"
+                language="json"
+                (valueChange)="onDraftEditorValueChange($event)"
+              />
+            } @else {
+              <app-theme-json-code-editor
+                #jsonEditorRef
+                [value]="cssOnlyText()"
+                [fullscreen]="isFullscreen()"
+                language="css"
+                (valueChange)="onCssOnlyEditorValueChange($event)"
+              />
+            }
           </div>
         </section>
       }
@@ -370,7 +467,7 @@
 
           <section class="theme-studio-card p-4">
             <div class="flex items-center justify-between gap-3">
-              <p class="text-sm font-semibold text-foreground">Schema Hints</p>
+              <p class="text-sm font-semibold text-foreground">Editable Attributes</p>
 
               <button
                 type="button"
@@ -468,7 +565,7 @@
 
           <div class="mt-5">
             <app-theme-grid-editor
-              [container]="selectedContainer() === 'appShell' ? layoutContainers[0] : layoutContainers[1]"
+              [container]="selectedLayoutContainer()"
               [items]="selectedContainerItems()"
               [selectedKey]="selectedElementKey()"
               [disabled]="!draftIsValid()"
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.scss b/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.scss
index c0c4cfc..41a8453 100644
--- a/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.scss
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.scss
@@ -18,6 +18,54 @@
   gap: 0.35rem;
 }
 
+.theme-settings__workspace-selector--mobile {
+  display: none;
+}
+
+.theme-settings__workspace-tabs {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 0.5rem;
+}
+
+.theme-settings__workspace-tab {
+  min-height: 5rem;
+  border: 1px solid hsl(var(--border));
+  border-radius: 0.5rem;
+  background: hsl(var(--secondary) / 0.22);
+  padding: 0.8rem 0.9rem;
+  text-align: left;
+  transition:
+    border-color 160ms ease,
+    background-color 160ms ease,
+    box-shadow 160ms ease;
+}
+
+.theme-settings__workspace-tab:hover {
+  background: hsl(var(--secondary) / 0.42);
+}
+
+.theme-settings__workspace-tab--active {
+  border-color: hsl(var(--primary) / 0.45);
+  background: hsl(var(--primary) / 0.1);
+  box-shadow: inset 0 0 0 1px hsl(var(--primary) / 0.1);
+}
+
+.theme-settings__workspace-tab-label {
+  display: block;
+  font-size: 0.85rem;
+  font-weight: 700;
+  color: hsl(var(--foreground));
+}
+
+.theme-settings__workspace-tab-description {
+  display: block;
+  margin-top: 0.35rem;
+  font-size: 0.74rem;
+  line-height: 1.45;
+  color: hsl(var(--muted-foreground));
+}
+
 .theme-settings__workspace-selector-label {
   font-size: 0.69rem;
   font-weight: 700;
@@ -52,6 +100,29 @@
   font-size: 0.84rem;
 }
 
+.theme-settings__workspace {
+  display: grid;
+  align-items: stretch;
+  grid-template-columns: minmax(17rem, 22rem) minmax(0, 1fr);
+  gap: 0.75rem;
+}
+
+.theme-settings__sidebar {
+  display: flex;
+  min-width: 0;
+  min-height: 0;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.theme-settings__main {
+  display: flex;
+  min-width: 0;
+  min-height: 0;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
 .theme-settings__editor-card {
   display: flex;
   min-height: 0;
@@ -92,6 +163,22 @@
   background: hsl(var(--primary) / 0.08);
 }
 
+.theme-settings__explorer-card {
+  display: flex;
+  flex: 1 1 auto;
+  height: 100%;
+  min-height: 0;
+  flex-direction: column;
+}
+
+.theme-settings__explorer-list {
+  flex: 1 1 auto;
+  min-height: 0;
+  overflow-y: auto;
+  overscroll-behavior: contain;
+  padding-right: 0.25rem;
+}
+
 .theme-json-editor-panel__header {
   min-width: 0;
 }
@@ -114,3 +201,22 @@
   min-height: 0;
   flex: 1 1 auto;
 }
+
+@media (max-width: 780px) {
+  .theme-settings__workspace-tabs {
+    display: none;
+  }
+
+  .theme-settings__workspace-selector--mobile {
+    display: flex;
+  }
+
+  .theme-settings__workspace {
+    display: flex;
+    flex-direction: column;
+  }
+
+  .theme-settings__explorer-card {
+    max-height: min(28rem, calc(100vh - 10rem));
+  }
+}
diff --git a/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.ts b/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.ts
index 8efbaa4..8a03611 100644
--- a/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.ts
+++ b/toju-app/src/app/domains/theme/feature/settings/theme-settings/theme-settings.component.ts
@@ -9,6 +9,7 @@ import {
 import { CommonModule } from '@angular/common';
 
 import { SettingsModalService } from '../../../../../core/services/settings-modal.service';
+import { getElectronApi } from '../../../../../core/platform/electron/get-electron-api';
 import {
   ThemeContainerKey,
   ThemeElementStyleProperty,
@@ -29,7 +30,8 @@ import { THEME_LLM_GUIDE } from '../../../domain/constants/theme-llm-guide.const
 import { ThemeGridEditorComponent } from '../theme-grid-editor/theme-grid-editor.component';
 import { ThemeJsonCodeEditorComponent } from '../theme-json-code-editor/theme-json-code-editor.component';
 
-type JumpSection = 'elements' | 'layout' | 'animations';
+type JumpSection = 'elements' | 'layout' | 'animations' | 'css';
+type ThemeEditorTab = 'json' | 'cssOnly';
 type ThemeStudioWorkspace = 'editor' | 'inspector' | 'layout';
 
 @Component({
@@ -59,6 +61,7 @@ export class ThemeSettingsComponent {
   readonly statusMessage = this.theme.statusMessage;
   readonly isDraftDirty = this.theme.isDraftDirty;
   readonly isFullscreen = this.modal.themeStudioFullscreen;
+  readonly activeTheme = this.theme.activeTheme;
   readonly draftTheme = this.theme.draftTheme;
   readonly THEME_ANIMATION_FIELDS = THEME_ANIMATION_FIELD_HINTS;
   readonly animationKeys = this.theme.knownAnimationClasses;
@@ -83,6 +86,8 @@ export class ThemeSettingsComponent {
   ];
   readonly mountedKeyCounts = computed(() => this.registry.mountedKeyCounts());
   readonly activeWorkspace = signal<ThemeStudioWorkspace>('editor');
+  readonly activeEditorTab = signal<ThemeEditorTab>('json');
+  readonly cssOnlyText = signal('');
   readonly explorerQuery = signal('');
 
   readonly selectedContainer = signal<ThemeContainerKey>('roomLayout');
@@ -103,9 +108,15 @@ export class ThemeSettingsComponent {
     ].filter((value): value is string => value !== null);
   });
   readonly selectedContainerItems = computed(() => this.layoutSync.itemsForContainer(this.selectedContainer()));
+  readonly selectedLayoutContainer = computed(() => {
+    return this.layoutContainers.find((container) => container.key === this.selectedContainer()) ?? this.layoutContainers[0];
+  });
   readonly selectedElementGrid = computed(() => {
     return this.selectedContainerItems().find((item) => item.key === this.selectedElementKey()) ?? null;
   });
+  readonly activeWorkspaceInfo = computed(() => {
+    return this.workspaceTabs.find((workspace) => workspace.key === this.activeWorkspace()) ?? this.workspaceTabs[0];
+  });
   readonly visiblePropertyHints = computed(() => {
     const selected = this.selectedElement();
 
@@ -156,6 +167,8 @@ export class ThemeSettingsComponent {
   private llmGuideCopyTimeoutId: ReturnType<typeof setTimeout> | null = null;
 
   constructor() {
+    this.syncCssOnlyTextFromTheme();
+
     if (this.savedThemesAvailable()) {
       void this.themeLibrary.refresh();
     }
@@ -167,8 +180,16 @@ export class ThemeSettingsComponent {
         return;
       }
 
-      this.activeWorkspace.set('inspector');
-      this.selectThemeEntry(pickedKey, 'elements');
+      this.openPickedElementInJson(pickedKey);
+      this.picker.clearSelection();
+    });
+
+    effect(() => {
+      if (this.activeEditorTab() !== 'json') {
+        return;
+      }
+
+      this.cssOnlyText.set(this.draftTheme().css);
     });
 
     effect(() => {
@@ -186,10 +207,35 @@ export class ThemeSettingsComponent {
     this.theme.updateDraftText(value);
   }
 
+  onCssOnlyEditorValueChange(value: string): void {
+    this.cssOnlyText.set(value);
+  }
+
   applyDraft(): void {
+    if (this.activeEditorTab() === 'cssOnly') {
+      this.applyCssOnlyTheme();
+      return;
+    }
+
     this.theme.applyDraft();
   }
 
+  applyCssOnlyTheme(): void {
+    this.theme.applyCssOnlyTheme(this.cssOnlyText());
+  }
+
+  setEditorTab(tab: ThemeEditorTab): void {
+    this.activeEditorTab.set(tab);
+
+    if (tab === 'json') {
+      this.focusEditor();
+      return;
+    }
+
+    this.syncCssOnlyTextFromTheme();
+    this.focusEditor();
+  }
+
   setWorkspace(workspace: ThemeStudioWorkspace): void {
     this.activeWorkspace.set(workspace);
 
@@ -202,6 +248,7 @@ export class ThemeSettingsComponent {
     }
 
     if (workspace === 'editor') {
+      this.activeEditorTab.set('json');
       this.focusEditor();
     }
   }
@@ -223,12 +270,36 @@ export class ThemeSettingsComponent {
     this.focusEditor();
   }
 
+  async exportThemeFile(): Promise<void> {
+    const exportText = this.getExportThemeText();
+
+    if (!exportText) {
+      return;
+    }
+
+    const fileName = `${this.sanitizeThemeFileName(this.draftTheme().meta.name)}.json`;
+    const saved = await this.saveTextAsFile(fileName, exportText);
+
+    this.theme.announceStatus(saved ? `${fileName} exported.` : 'Theme export cancelled.');
+  }
+
+  importThemeFile(event: Event): void {
+    const input = event.target as HTMLInputElement;
+    const file = input.files?.[0] ?? null;
+
+    input.value = '';
+
+    if (!file) {
+      return;
+    }
+
+    void this.loadThemeFile(file);
+  }
+
   async copyLlmThemeGuide(): Promise<void> {
     const copied = await this.copyTextToClipboard(THEME_LLM_GUIDE);
 
-    this.setLlmGuideCopyMessage(copied
-      ? 'LLM guide copied.'
-      : 'Manual copy opened.');
+    this.setLlmGuideCopyMessage(copied ? 'LLM guide copied.' : 'Manual copy opened.');
   }
 
   startPicker(): void {
@@ -285,9 +356,10 @@ export class ThemeSettingsComponent {
   restoreDefaultTheme(): void {
     this.theme.resetToDefault('button');
     this.activeWorkspace.set('editor');
+    this.activeEditorTab.set('json');
     this.selectedContainer.set('roomLayout');
     this.selectedElementKey.set('chatRoomMainPanel');
-    this.focusJsonAnchor('elements', 'chatRoomMainPanel');
+    this.focusEditor();
   }
 
   selectThemeEntry(key: string, section: JumpSection = 'elements'): void {
@@ -299,7 +371,7 @@ export class ThemeSettingsComponent {
 
     if (section === 'layout') {
       this.activeWorkspace.set('layout');
-    } else if (section === 'animations') {
+    } else if (section === 'animations' || section === 'css') {
       this.activeWorkspace.set('editor');
     } else {
       this.activeWorkspace.set('inspector');
@@ -331,6 +403,9 @@ export class ThemeSettingsComponent {
     const value = getSuggestedFieldDefault(property, this.animationKeys());
 
     this.theme.setElementStyle(this.selectedElementKey(), property, value);
+    this.activeWorkspace.set('editor');
+    this.activeEditorTab.set('json');
+    this.focusJsonProperty('elements', this.selectedElementKey(), property);
   }
 
   addStarterAnimation(): void {
@@ -355,37 +430,200 @@ export class ThemeSettingsComponent {
 
   jumpToLayout(): void {
     this.activeWorkspace.set('editor');
+    this.activeEditorTab.set('json');
     this.focusJsonAnchor('layout', this.selectedElementKey());
   }
 
   jumpToStyles(): void {
     this.activeWorkspace.set('editor');
+    this.activeEditorTab.set('json');
     this.focusJsonAnchor('elements', this.selectedElementKey());
   }
 
   jumpToAnimation(animationKey: string): void {
     this.activeWorkspace.set('editor');
+    this.activeEditorTab.set('json');
     this.focusJsonAnchor('animations', animationKey);
   }
 
+  jumpToCss(): void {
+    this.activeWorkspace.set('editor');
+    this.activeEditorTab.set('cssOnly');
+    this.syncCssOnlyTextFromTheme();
+    this.focusEditor();
+  }
+
   isMounted(entry: ThemeRegistryEntry): boolean {
     return (this.mountedKeyCounts()[entry.key] ?? 0) > 0;
   }
 
   private focusEditor(): void {
+    this.withEditorReady((editor) => {
+      editor.focus();
+    });
+  }
+
+  private withEditorReady(action: (editor: ThemeJsonCodeEditorComponent) => void, attempts = 8): void {
     queueMicrotask(() => {
-      this.editorRef()?.focus();
+      const editor = this.editorRef();
+
+      if (editor) {
+        action(editor);
+        return;
+      }
+
+      if (attempts <= 0) {
+        return;
+      }
+
+      setTimeout(() => {
+        this.withEditorReady(action, attempts - 1);
+      });
+    });
+  }
+
+  private syncCssOnlyTextFromTheme(): void {
+    this.cssOnlyText.set(this.activeTheme().css || this.draftTheme().css);
+  }
+
+  private getExportThemeText(): string | null {
+    if (this.activeEditorTab() === 'cssOnly') {
+      return this.theme.buildDraftTextWithCss(this.cssOnlyText());
+    }
+
+    if (!this.draftIsValid()) {
+      this.theme.announceStatus('Fix JSON errors before exporting the theme.');
+      return null;
+    }
+
+    return this.draftText();
+  }
+
+  private async loadThemeFile(file: File): Promise<void> {
+    try {
+      const text = await file.text();
+
+      if (file.name.toLowerCase().endsWith('.css')) {
+        this.activeWorkspace.set('editor');
+        this.activeEditorTab.set('cssOnly');
+        this.cssOnlyText.set(text);
+        this.theme.announceStatus(`${file.name} loaded into the CSS editor.`);
+        this.focusEditor();
+        return;
+      }
+
+      const loaded = this.theme.loadThemeText(text, 'draft', `${file.name} imported into the draft editor.`, 'imported theme file');
+
+      if (!loaded) {
+        return;
+      }
+
+      this.activeWorkspace.set('editor');
+      this.activeEditorTab.set('json');
+      this.syncCssOnlyTextFromTheme();
+      this.focusEditor();
+    } catch {
+      this.theme.announceStatus(`Unable to import ${file.name}.`);
+    }
+  }
+
+  private async saveTextAsFile(fileName: string, text: string): Promise<boolean> {
+    const electronApi = getElectronApi();
+
+    if (electronApi) {
+      const result = await electronApi.saveFileAs(fileName, this.encodeBase64(text));
+
+      return result.saved;
+    }
+
+    const url = URL.createObjectURL(new Blob([text], { type: 'application/json' }));
+    const link = document.createElement('a');
+
+    link.href = url;
+    link.download = fileName;
+    link.style.display = 'none';
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+    URL.revokeObjectURL(url);
+
+    return true;
+  }
+
+  private encodeBase64(value: string): string {
+    const bytes = new TextEncoder().encode(value);
+
+    let binary = '';
+
+    for (const byte of bytes) {
+      binary += String.fromCharCode(byte);
+    }
+
+    return btoa(binary);
+  }
+
+  private sanitizeThemeFileName(value: string): string {
+    const normalized = value
+      .trim()
+      .toLowerCase()
+      .replace(/[^a-z0-9]+/g, '-')
+      .replace(/^-+|-+$/g, '');
+
+    return normalized.length > 0 ? normalized : 'theme';
+  }
+
+  private openPickedElementInJson(key: string): void {
+    const definition = this.registry.getDefinition(key);
+
+    if (!definition) {
+      return;
+    }
+
+    this.selectedElementKey.set(key);
+
+    if (definition.container) {
+      this.selectedContainer.set(definition.container);
+    }
+
+    if (this.draftIsValid()) {
+      this.theme.ensureElementEntry(key);
+    }
+
+    this.activeWorkspace.set('editor');
+    this.activeEditorTab.set('json');
+    this.focusJsonElementEntry(key);
+  }
+
+  private focusJsonElementEntry(key: string): void {
+    this.withEditorReady((editor) => {
+      let text = this.draftText();
+      let anchorIndex = this.findAnchorIndex(text, 'elements', key);
+
+      if (anchorIndex === -1 && this.draftIsValid()) {
+        this.theme.ensureElementEntry(key);
+        text = this.draftText();
+        anchorIndex = this.findAnchorIndex(text, 'elements', key);
+      }
+
+      if (anchorIndex === -1) {
+        editor.focus();
+        return;
+      }
+
+      const colonIndex = text.indexOf(':', anchorIndex);
+      const objectStart = colonIndex === -1 ? -1 : text.indexOf('{', colonIndex);
+
+      if (objectStart === -1) {
+        editor.focusRange(anchorIndex, Math.min(anchorIndex + key.length + 2, text.length));
+        return;
+      }
+
+      editor.focusRange(objectStart + 1, objectStart + 1);
     });
   }
 
   private focusJsonAnchor(section: JumpSection, key: string): void {
-    queueMicrotask(() => {
-      const editor = this.editorRef();
-
-      if (!editor) {
-        return;
-      }
-
+    this.withEditorReady((editor) => {
       let text = this.draftText();
       let anchorIndex = this.findAnchorIndex(text, section, key);
 
@@ -413,6 +651,94 @@ export class ThemeSettingsComponent {
     });
   }
 
+  private focusJsonProperty(section: JumpSection, key: string, property: string): void {
+    this.withEditorReady((editor) => {
+      const text = this.draftText();
+      const keyIndex = this.findAnchorIndex(text, section, key);
+
+      if (keyIndex === -1) {
+        editor.focus();
+        return;
+      }
+
+      const propertyIndex = text.indexOf(`"${property}"`, keyIndex);
+
+      if (propertyIndex === -1) {
+        editor.focusRange(keyIndex, Math.min(keyIndex + key.length + 2, text.length));
+        return;
+      }
+
+      const valueRange = this.findJsonPropertyValueRange(text, propertyIndex);
+
+      editor.focusRange(valueRange.start, valueRange.end);
+    });
+  }
+
+  private findJsonPropertyValueRange(text: string, propertyIndex: number): { start: number; end: number } {
+    const colonIndex = text.indexOf(':', propertyIndex);
+
+    if (colonIndex === -1) {
+      return {
+        start: propertyIndex,
+        end: propertyIndex
+      };
+    }
+
+    let valueStart = colonIndex + 1;
+
+    while (valueStart < text.length && /\s/.test(text[valueStart])) {
+      valueStart += 1;
+    }
+
+    if (text[valueStart] === '"') {
+      const stringContentStart = valueStart + 1;
+
+      let stringContentEnd = stringContentStart;
+
+      while (stringContentEnd < text.length) {
+        if (text[stringContentEnd] === '"' && text[stringContentEnd - 1] !== '\\') {
+          break;
+        }
+
+        stringContentEnd += 1;
+      }
+
+      return {
+        start: stringContentStart,
+        end: stringContentEnd
+      };
+    }
+
+    let valueEnd = valueStart;
+
+    while (valueEnd < text.length && ![
+      ',',
+      '\n',
+      '}'
+    ].includes(text[valueEnd])) {
+      valueEnd += 1;
+    }
+
+    return {
+      start: valueStart,
+      end: Math.max(valueStart, valueEnd)
+    };
+  }
+
+  private focusJsonSection(section: JumpSection): void {
+    this.withEditorReady((editor) => {
+      const text = this.draftText();
+      const anchorIndex = text.indexOf(`"${section}"`);
+
+      if (anchorIndex === -1) {
+        editor.focus();
+        return;
+      }
+
+      editor.focusRange(anchorIndex, Math.min(anchorIndex + section.length + 2, text.length));
+    });
+  }
+
   private async copyTextToClipboard(value: string): Promise<boolean> {
     if (navigator.clipboard?.writeText) {
       try {
diff --git a/toju-app/src/app/domains/theme/feature/theme-node.directive.ts b/toju-app/src/app/domains/theme/feature/theme-node.directive.ts
index 0fee665..5625573 100644
--- a/toju-app/src/app/domains/theme/feature/theme-node.directive.ts
+++ b/toju-app/src/app/domains/theme/feature/theme-node.directive.ts
@@ -12,6 +12,7 @@ import { ExternalLinkService } from '../../../core/platform';
 import { ElementPickerService } from '../application/services/element-picker.service';
 import { ThemeRegistryService } from '../application/services/theme-registry.service';
 import { ThemeService } from '../application/services/theme.service';
+import { applyThemeStyleDeclaration } from './theme-style-application.logic';
 
 function looksLikeImageReference(value: string): boolean {
   return value.startsWith('url(')
@@ -96,8 +97,7 @@ export class ThemeNodeDirective implements OnDestroy {
     this.clearAppliedStyles();
 
     for (const [styleKey, styleValue] of Object.entries(styles)) {
-      this.host.nativeElement.style.setProperty(styleKey, styleValue);
-      this.appliedStyleKeys.add(styleKey);
+      this.appliedStyleKeys.add(applyThemeStyleDeclaration(this.host.nativeElement, styleKey, styleValue));
     }
   }
 
diff --git a/toju-app/src/app/domains/theme/feature/theme-style-application.logic.spec.ts b/toju-app/src/app/domains/theme/feature/theme-style-application.logic.spec.ts
new file mode 100644
index 0000000..a4de8ef
--- /dev/null
+++ b/toju-app/src/app/domains/theme/feature/theme-style-application.logic.spec.ts
@@ -0,0 +1,56 @@
+import {
+  applyThemeStyleDeclaration,
+  toCssStylePropertyName
+} from './theme-style-application.logic';
+
+describe('theme style application', () => {
+  it('applies camelCase theme properties as real CSS declarations', () => {
+    const host = createHost();
+
+    expect(applyThemeStyleDeclaration(host, 'backgroundImage', 'url("/theme.png")')).toBe('background-image');
+    expect(applyThemeStyleDeclaration(host, 'borderRadius', '12px')).toBe('border-radius');
+    expect(applyThemeStyleDeclaration(host, 'boxShadow', '0 4px 20px rgba(0, 0, 0, 0.25)')).toBe('box-shadow');
+
+    expect(host.style.backgroundImage).toContain('/theme.png');
+    expect(host.style.borderRadius).toBe('12px');
+    expect(host.style.boxShadow).toBe('0 4px 20px rgba(0, 0, 0, 0.25)');
+  });
+
+  it('keeps CSS custom properties intact', () => {
+    const host = createHost();
+
+    expect(toCssStylePropertyName('--theme-effect-glass-blur')).toBe('--theme-effect-glass-blur');
+    applyThemeStyleDeclaration(host, '--theme-effect-glass-blur', 'blur(18px)');
+
+    expect(host.style.getPropertyValue('--theme-effect-glass-blur')).toBe('blur(18px)');
+  });
+});
+
+function createHost(): HTMLElement {
+  const values = new Map<string, string>();
+  const style = {
+    backgroundImage: '',
+    borderRadius: '',
+    boxShadow: '',
+    setProperty(propertyName: string, value: string) {
+      values.set(propertyName, value);
+
+      if (propertyName === 'background-image') {
+        this.backgroundImage = value;
+      }
+
+      if (propertyName === 'border-radius') {
+        this.borderRadius = value;
+      }
+
+      if (propertyName === 'box-shadow') {
+        this.boxShadow = value;
+      }
+    },
+    getPropertyValue(propertyName: string) {
+      return values.get(propertyName) ?? '';
+    }
+  };
+
+  return { style } as unknown as HTMLElement;
+}
diff --git a/toju-app/src/app/domains/theme/feature/theme-style-application.logic.ts b/toju-app/src/app/domains/theme/feature/theme-style-application.logic.ts
new file mode 100644
index 0000000..d43b8cb
--- /dev/null
+++ b/toju-app/src/app/domains/theme/feature/theme-style-application.logic.ts
@@ -0,0 +1,14 @@
+export function toCssStylePropertyName(propertyName: string): string {
+  if (propertyName.startsWith('--')) {
+    return propertyName;
+  }
+
+  return propertyName.replace(/([A-Z])/g, '-$1').toLowerCase();
+}
+
+export function applyThemeStyleDeclaration(host: HTMLElement, propertyName: string, value: string): string {
+  const cssPropertyName = toCssStylePropertyName(propertyName);
+
+  host.style.setProperty(cssPropertyName, value);
+  return cssPropertyName;
+}
diff --git a/toju-app/src/app/domains/voice-session/feature/voice-controls/voice-controls.component.html b/toju-app/src/app/domains/voice-session/feature/voice-controls/voice-controls.component.html
index 7347b2b..8f05e89 100644
--- a/toju-app/src/app/domains/voice-session/feature/voice-controls/voice-controls.component.html
+++ b/toju-app/src/app/domains/voice-session/feature/voice-controls/voice-controls.component.html
@@ -1,4 +1,7 @@
-<div class="flex flex-col rounded-md border border-border bg-background px-3 py-2.5">
+<div
+  appThemeNode="voiceControlsPanel"
+  class="flex flex-col rounded-md border border-border bg-background px-3 py-2.5"
+>
   <!-- Connection Error Banner -->
   @if (showConnectionError()) {
     <div class="mb-3 flex items-center gap-2 rounded-md border border-destructive/30 bg-destructive/10 p-2">
@@ -15,7 +18,10 @@
   }
 
   <!-- User Info -->
-  <div class="relative flex items-center gap-3">
+  <div
+    appThemeNode="voiceControlsUserRow"
+    class="relative flex items-center gap-3"
+  >
     <button
       type="button"
       class="flex items-center gap-3 flex-1 min-w-0 rounded-md px-1 py-0.5 hover:bg-secondary/60 transition-colors cursor-pointer"
@@ -73,7 +79,10 @@
     [attr.aria-hidden]="isConnected() ? null : 'true'"
   >
     <div class="overflow-hidden">
-      <div class="flex items-center justify-center gap-2">
+      <div
+        appThemeNode="voiceControlsButtons"
+        class="flex items-center justify-center gap-2"
+      >
         <!-- Mute Toggle -->
         <button
           type="button"
diff --git a/toju-app/src/app/domains/voice-session/feature/voice-controls/voice-controls.component.ts b/toju-app/src/app/domains/voice-session/feature/voice-controls/voice-controls.component.ts
index c1ac380..4a6bf7d 100644
--- a/toju-app/src/app/domains/voice-session/feature/voice-controls/voice-controls.component.ts
+++ b/toju-app/src/app/domains/voice-session/feature/voice-controls/voice-controls.component.ts
@@ -28,6 +28,7 @@ import { loadVoiceSettingsFromStorage, saveVoiceSettingsToStorage } from '../../
 import { VoiceActivityService, VoiceConnectionFacade } from '../../../../domains/voice-connection';
 import { PlaybackOptions, VoicePlaybackService } from '../../../../domains/voice-connection';
 import { ScreenShareFacade, ScreenShareQuality } from '../../../../domains/screen-share';
+import { ThemeNodeDirective } from '../../../theme';
 import { UsersActions } from '../../../../store/users/users.actions';
 import { selectCurrentUser } from '../../../../store/users/users.selectors';
 import { selectCurrentRoom } from '../../../../store/rooms/rooms.selectors';
@@ -52,7 +53,8 @@ interface AudioDevice {
     NgIcon,
     DebugConsoleComponent,
     ScreenShareQualityDialogComponent,
-    UserAvatarComponent
+    UserAvatarComponent,
+    ThemeNodeDirective
   ],
   viewProviders: [
     provideIcons({
@@ -145,17 +147,11 @@ export class VoiceControlsComponent implements OnInit, OnDestroy {
       const devices = await navigator.mediaDevices.enumerateDevices();
 
       this.inputDevices.set(
-        devices
-          .filter((device) => device.kind === 'audioinput')
-          .map((device) => ({ deviceId: device.deviceId,
-            label: device.label }))
+        devices.filter((device) => device.kind === 'audioinput').map((device) => ({ deviceId: device.deviceId, label: device.label }))
       );
 
       this.outputDevices.set(
-        devices
-          .filter((device) => device.kind === 'audiooutput')
-          .map((device) => ({ deviceId: device.deviceId,
-            label: device.label }))
+        devices.filter((device) => device.kind === 'audiooutput').map((device) => ({ deviceId: device.deviceId, label: device.label }))
       );
     } catch (_error) {}
   }
@@ -238,9 +234,7 @@ export class VoiceControlsComponent implements OnInit, OnDestroy {
       this.webrtcService.clearConnectionError();
       this.saveSettings();
     } catch (error) {
-      const message = error instanceof Error
-        ? error.message
-        : 'Failed to connect voice session.';
+      const message = error instanceof Error ? error.message : 'Failed to connect voice session.';
 
       this.webrtcService.reportConnectionError(message);
     }
diff --git a/toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.html b/toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.html
index 012ddf7..bbaf4c1 100644
--- a/toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.html
+++ b/toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.html
@@ -1,6 +1,9 @@
 <!-- eslint-disable @angular-eslint/template/button-has-type, @angular-eslint/template/cyclomatic-complexity -->
 <aside class="flex h-full min-h-0 flex-col bg-card">
-  <div class="border-b border-border px-3 py-3">
+  <div
+    appThemeNode="roomPanelHeader"
+    class="border-b border-border px-3 py-3"
+  >
     @if (panelMode() === 'channels') {
       <div class="flex items-center gap-3">
         <div class="grid h-9 w-9 place-items-center rounded-md bg-secondary text-sm font-semibold text-foreground">
@@ -33,7 +36,10 @@
   @if (panelMode() === 'channels') {
     <div class="flex-1 overflow-auto">
       <!-- Text Channels -->
-      <section class="px-2 py-3">
+      <section
+        appThemeNode="roomTextChannelsSection"
+        class="px-2 py-3"
+      >
         <div class="mb-2 flex items-center justify-between px-1">
           <h4 class="text-xs font-semibold uppercase tracking-[0.18em] text-muted-foreground">Text Channels</h4>
           @if (canManageChannels()) {
@@ -52,6 +58,7 @@
         <div class="space-y-1">
           @for (ch of textChannels(); track ch.id) {
             <button
+              appThemeNode="roomTextChannelItem"
               class="flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-left text-sm transition-colors"
               [class.bg-secondary]="activeChannelId() === ch.id"
               [class.text-foreground]="activeChannelId() === ch.id"
@@ -94,7 +101,10 @@
       </section>
 
       <!-- Voice Channels -->
-      <section class="border-t border-border px-2 py-3">
+      <section
+        appThemeNode="roomVoiceChannelsSection"
+        class="border-t border-border px-2 py-3"
+      >
         <div class="mb-2 flex items-center justify-between px-1">
           <h4 class="text-xs font-semibold uppercase tracking-[0.18em] text-muted-foreground">Voice Channels</h4>
           @if (canManageChannels()) {
@@ -125,6 +135,7 @@
               (drop)="onVoiceChannelDrop($event, ch.id)"
             >
               <button
+                appThemeNode="roomVoiceChannelItem"
                 class="flex w-full items-center justify-between rounded-md px-2 py-1.5 text-left text-sm transition-colors hover:bg-secondary/60"
                 (click)="joinVoice(ch.id)"
                 (contextmenu)="openChannelContextMenu($event, ch)"
@@ -174,6 +185,7 @@
                 >
                   @for (u of voiceUsersInRoom(ch.id); track u.id) {
                     <div
+                      appThemeNode="roomVoiceUserItem"
                       class="flex items-center gap-2 rounded-md px-2 py-1.5 transition-colors hover:bg-secondary/50"
                       [class.cursor-pointer]="canDragVoiceUser(u)"
                       [class.opacity-60]="draggedVoiceUserId() === (u.id || u.oderId)"
diff --git a/toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.ts b/toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.ts
index bdc42ef..0663c65 100644
--- a/toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.ts
+++ b/toju-app/src/app/features/room/rooms-side-panel/rooms-side-panel.component.ts
@@ -37,6 +37,7 @@ import { MessagesActions } from '../../../store/messages/messages.actions';
 import { RealtimeSessionFacade } from '../../../core/realtime';
 import { ScreenShareFacade } from '../../../domains/screen-share';
 import { NotificationsFacade } from '../../../domains/notifications';
+import { ThemeNodeDirective } from '../../../domains/theme';
 import {
   VoiceActivityService,
   VoiceConnectionFacade,
@@ -82,7 +83,8 @@ type PanelMode = 'channels' | 'users';
     ContextMenuComponent,
     UserVolumeMenuComponent,
     UserAvatarComponent,
-    ConfirmDialogComponent
+    ConfirmDialogComponent,
+    ThemeNodeDirective
   ],
   viewProviders: [
     provideIcons({
@@ -142,10 +144,8 @@ export class RoomsSidePanelComponent {
     const memberIdentifiers = this.roomMemberIdentifiers();
     const roomId = this.currentRoom()?.id;
 
-    return this.onlineUsers().filter((user) =>
-      !this.isCurrentUserIdentity(user)
-      && this.matchesIdentifiers(memberIdentifiers, user)
-      && this.isUserPresentInRoom(user, roomId)
+    return this.onlineUsers().filter(
+      (user) => !this.isCurrentUserIdentity(user) && this.matchesIdentifiers(memberIdentifiers, user) && this.isUserPresentInRoom(user, roomId)
     );
   });
   offlineRoomMembers = computed(() => {
@@ -661,9 +661,7 @@ export class RoomsSidePanelComponent {
   }
 
   private handleVoiceJoinFailure(error: unknown): void {
-    const message = error instanceof Error
-      ? error.message
-      : 'Failed to join voice channel.';
+    const message = error instanceof Error ? error.message : 'Failed to join voice channel.';
 
     this.voiceConnection.reportConnectionError(message);
   }
diff --git a/toju-app/src/app/features/servers/servers-rail/servers-rail.component.html b/toju-app/src/app/features/servers/servers-rail/servers-rail.component.html
index af95ec8..431d9ba 100644
--- a/toju-app/src/app/features/servers/servers-rail/servers-rail.component.html
+++ b/toju-app/src/app/features/servers/servers-rail/servers-rail.component.html
@@ -1,6 +1,7 @@
 <nav class="relative flex h-full w-full flex-col items-center gap-2 border-r border-border bg-secondary/35 px-2 py-3">
   <!-- Create button -->
   <button
+    appThemeNode="serversRailCreateButton"
     type="button"
     class="flex h-10 w-10 items-center justify-center rounded-md bg-primary text-primary-foreground transition-colors hover:bg-primary/90"
     title="Create Server"
@@ -17,7 +18,10 @@
   }
 
   <!-- Saved servers icons -->
-  <div class="no-scrollbar mt-2 flex w-full flex-1 flex-col items-center gap-2 overflow-y-auto pt-0.5">
+  <div
+    appThemeNode="serversRailList"
+    class="no-scrollbar mt-2 flex w-full flex-1 flex-col items-center gap-2 overflow-y-auto pt-0.5"
+  >
     @for (room of visibleSavedRooms(); track room.id) {
       <div class="group/server relative flex w-full justify-center">
         <span
@@ -27,6 +31,7 @@
         ></span>
 
         <button
+          appThemeNode="serversRailItem"
           type="button"
           class="relative z-10 flex h-10 w-10 cursor-pointer flex-shrink-0 items-center justify-center border border-transparent transition-[border-radius,box-shadow,background-color] duration-100 hover:rounded-lg hover:bg-card"
           [ngClass]="isSelectedRoom(room) ? 'rounded-lg ring-2 ring-primary/40 bg-primary/10' : 'rounded-xl bg-card'"
diff --git a/toju-app/src/app/features/servers/servers-rail/servers-rail.component.ts b/toju-app/src/app/features/servers/servers-rail/servers-rail.component.ts
index c366d0b..045e857 100644
--- a/toju-app/src/app/features/servers/servers-rail/servers-rail.component.ts
+++ b/toju-app/src/app/features/servers/servers-rail/servers-rail.component.ts
@@ -36,6 +36,7 @@ import { RoomsActions } from '../../../store/rooms/rooms.actions';
 import { DatabaseService } from '../../../infrastructure/persistence';
 import { NotificationsFacade } from '../../../domains/notifications';
 import { type ServerInfo, ServerDirectoryFacade } from '../../../domains/server-directory';
+import { ThemeNodeDirective } from '../../../domains/theme';
 import { hasRoomBanForUser } from '../../../domains/access-control';
 import {
   ConfirmDialogComponent,
@@ -54,6 +55,7 @@ import {
     ContextMenuComponent,
     LeaveServerDialogComponent,
     NgOptimizedImage,
+    ThemeNodeDirective,
     UserBarComponent
   ],
   viewProviders: [provideIcons({ lucidePlus })],
@@ -221,8 +223,7 @@ export class ServersRailComponent {
       return;
 
     this.joinPasswordError.set(null);
-    this.savedRoomJoinRequests.next({ room,
-      password: this.joinPassword() });
+    this.savedRoomJoinRequests.next({ room, password: this.joinPassword() });
   }
 
   isRoomMarkedBanned(room: Room): boolean {
@@ -264,10 +265,12 @@ export class ServersRailComponent {
 
     const isCurrentRoom = this.currentRoom()?.id === ctx.id;
 
-    this.store.dispatch(RoomsActions.forgetRoom({
-      roomId: ctx.id,
-      nextOwnerKey: result.nextOwnerKey
-    }));
+    this.store.dispatch(
+      RoomsActions.forgetRoom({
+        roomId: ctx.id,
+        nextOwnerKey: result.nextOwnerKey
+      })
+    );
 
     if (isCurrentRoom) {
       this.router.navigate(['/search']);
@@ -354,8 +357,7 @@ export class ServersRailComponent {
     this.prepareVoiceContext(room);
     this.closePasswordDialog();
     this.store.dispatch(RoomsActions.setSignalServerReconnecting({ isReconnecting: false }));
-    this.store.dispatch(RoomsActions.viewServer({ room,
-      skipBanCheck: true }));
+    this.store.dispatch(RoomsActions.viewServer({ room, skipBanCheck: true }));
   }
 
   private requestJoinInBackground(room: Room, password?: string) {
@@ -377,13 +379,17 @@ export class ServersRailComponent {
           return EMPTY;
         }
 
-        return this.serverDirectory.requestJoin({
-          roomId: room.id,
-          userId: currentUserId,
-          userPublicKey: currentUser?.oderId || currentUserId,
-          displayName: currentUser?.displayName || 'Anonymous',
-          password: password?.trim() || undefined
-        }, joinTarget.selector)
+        return this.serverDirectory
+          .requestJoin(
+            {
+              roomId: room.id,
+              userId: currentUserId,
+              userPublicKey: currentUser?.oderId || currentUserId,
+              displayName: currentUser?.displayName || 'Anonymous',
+              password: password?.trim() || undefined
+            },
+            joinTarget.selector
+          )
           .pipe(
             tap((response) => {
               this.closePasswordDialog();
@@ -447,22 +453,22 @@ export class ServersRailComponent {
     const errorCode = serverError?.error?.errorCode;
     const status = serverError?.status;
 
-    return errorCode === 'SERVER_NOT_FOUND'
-      || status === 0
-      || status === 404
-      || (typeof status === 'number' && status >= 500);
+    return errorCode === 'SERVER_NOT_FOUND' || status === 0 || status === 404 || (typeof status === 'number' && status >= 500);
   }
 
   private toRoomRefreshChanges(room: Room, server: ServerInfo, signalingUrl?: string): Partial<Room> {
-    const resolvedSource = this.serverDirectory.normaliseRoomSignalSource({
-      sourceId: server.sourceId ?? room.sourceId,
-      sourceName: server.sourceName ?? room.sourceName,
-      sourceUrl: server.sourceUrl ?? room.sourceUrl,
-      signalingUrl,
-      fallbackName: server.sourceName ?? room.sourceName ?? room.name
-    }, {
-      ensureEndpoint: true
-    });
+    const resolvedSource = this.serverDirectory.normaliseRoomSignalSource(
+      {
+        sourceId: server.sourceId ?? room.sourceId,
+        sourceName: server.sourceName ?? room.sourceName,
+        sourceUrl: server.sourceUrl ?? room.sourceUrl,
+        signalingUrl,
+        fallbackName: server.sourceName ?? room.sourceName ?? room.name
+      },
+      {
+        ensureEndpoint: true
+      }
+    );
 
     return {
       name: server.name,
@@ -472,15 +478,10 @@ export class ServersRailComponent {
       userCount: server.userCount,
       maxUsers: server.maxUsers,
       hasPassword:
-        typeof server.hasPassword === 'boolean'
-          ? server.hasPassword
-          : (typeof room.hasPassword === 'boolean' ? room.hasPassword : !!room.password),
+        typeof server.hasPassword === 'boolean' ? server.hasPassword : typeof room.hasPassword === 'boolean' ? room.hasPassword : !!room.password,
       isPrivate: server.isPrivate,
       createdAt: server.createdAt,
-      channels:
-        Array.isArray(server.channels) && server.channels.length > 0
-          ? server.channels
-          : room.channels,
+      channels: Array.isArray(server.channels) && server.channels.length > 0 ? server.channels : room.channels,
       ...resolvedSource
     };
   }
@@ -489,26 +490,33 @@ export class ServersRailComponent {
     room: Room;
     selector: ReturnType<ServerDirectoryFacade['buildRoomSignalSelector']>;
   }> {
-    let resolvedRoom = this.applyResolvedRoomSource(room, this.serverDirectory.normaliseRoomSignalSource({
-      sourceId: room.sourceId,
-      sourceName: room.sourceName,
-      sourceUrl: room.sourceUrl,
-      fallbackName: room.sourceName ?? room.name
-    }, {
-      ensureEndpoint: !!room.sourceUrl
-    }));
-    let selector = this.serverDirectory.buildRoomSignalSelector({
-      sourceId: resolvedRoom.sourceId,
-      sourceName: resolvedRoom.sourceName,
-      sourceUrl: resolvedRoom.sourceUrl,
-      fallbackName: resolvedRoom.sourceName ?? resolvedRoom.name
-    }, {
-      ensureEndpoint: !!resolvedRoom.sourceUrl
-    });
+    let resolvedRoom = this.applyResolvedRoomSource(
+      room,
+      this.serverDirectory.normaliseRoomSignalSource(
+        {
+          sourceId: room.sourceId,
+          sourceName: room.sourceName,
+          sourceUrl: room.sourceUrl,
+          fallbackName: room.sourceName ?? room.name
+        },
+        {
+          ensureEndpoint: !!room.sourceUrl
+        }
+      )
+    );
+    let selector = this.serverDirectory.buildRoomSignalSelector(
+      {
+        sourceId: resolvedRoom.sourceId,
+        sourceName: resolvedRoom.sourceName,
+        sourceUrl: resolvedRoom.sourceUrl,
+        fallbackName: resolvedRoom.sourceName ?? resolvedRoom.name
+      },
+      {
+        ensureEndpoint: !!resolvedRoom.sourceUrl
+      }
+    );
 
-    const authoritativeServer = selector
-      ? await firstValueFrom(this.serverDirectory.getServer(room.id, selector))
-      : null;
+    const authoritativeServer = selector ? await firstValueFrom(this.serverDirectory.getServer(room.id, selector)) : null;
 
     if (!authoritativeServer) {
       return {
@@ -517,24 +525,30 @@ export class ServersRailComponent {
       };
     }
 
-    const authoritativeSource = this.serverDirectory.normaliseRoomSignalSource({
-      sourceId: authoritativeServer.sourceId ?? resolvedRoom.sourceId,
-      sourceName: authoritativeServer.sourceName ?? resolvedRoom.sourceName,
-      sourceUrl: authoritativeServer.sourceUrl ?? resolvedRoom.sourceUrl,
-      fallbackName: authoritativeServer.sourceName ?? resolvedRoom.sourceName ?? resolvedRoom.name
-    }, {
-      ensureEndpoint: !!(authoritativeServer.sourceUrl ?? resolvedRoom.sourceUrl)
-    });
+    const authoritativeSource = this.serverDirectory.normaliseRoomSignalSource(
+      {
+        sourceId: authoritativeServer.sourceId ?? resolvedRoom.sourceId,
+        sourceName: authoritativeServer.sourceName ?? resolvedRoom.sourceName,
+        sourceUrl: authoritativeServer.sourceUrl ?? resolvedRoom.sourceUrl,
+        fallbackName: authoritativeServer.sourceName ?? resolvedRoom.sourceName ?? resolvedRoom.name
+      },
+      {
+        ensureEndpoint: !!(authoritativeServer.sourceUrl ?? resolvedRoom.sourceUrl)
+      }
+    );
 
     resolvedRoom = this.applyResolvedRoomSource(resolvedRoom, authoritativeSource);
-    selector = this.serverDirectory.buildRoomSignalSelector({
-      sourceId: resolvedRoom.sourceId,
-      sourceName: resolvedRoom.sourceName,
-      sourceUrl: resolvedRoom.sourceUrl,
-      fallbackName: resolvedRoom.sourceName ?? resolvedRoom.name
-    }, {
-      ensureEndpoint: !!resolvedRoom.sourceUrl
-    });
+    selector = this.serverDirectory.buildRoomSignalSelector(
+      {
+        sourceId: resolvedRoom.sourceId,
+        sourceName: resolvedRoom.sourceName,
+        sourceUrl: resolvedRoom.sourceUrl,
+        fallbackName: resolvedRoom.sourceName ?? resolvedRoom.name
+      },
+      {
+        ensureEndpoint: !!resolvedRoom.sourceUrl
+      }
+    );
 
     return {
       room: resolvedRoom,
@@ -550,22 +564,20 @@ export class ServersRailComponent {
       sourceUrl: source.sourceUrl
     };
 
-    if (
-      room.sourceId === nextRoom.sourceId
-      && room.sourceName === nextRoom.sourceName
-      && room.sourceUrl === nextRoom.sourceUrl
-    ) {
+    if (room.sourceId === nextRoom.sourceId && room.sourceName === nextRoom.sourceName && room.sourceUrl === nextRoom.sourceUrl) {
       return room;
     }
 
-    this.store.dispatch(RoomsActions.updateRoom({
-      roomId: room.id,
-      changes: {
-        sourceId: nextRoom.sourceId,
-        sourceName: nextRoom.sourceName,
-        sourceUrl: nextRoom.sourceUrl
-      }
-    }));
+    this.store.dispatch(
+      RoomsActions.updateRoom({
+        roomId: room.id,
+        changes: {
+          sourceId: nextRoom.sourceId,
+          sourceName: nextRoom.sourceName,
+          sourceUrl: nextRoom.sourceUrl
+        }
+      })
+    );
 
     return nextRoom;
   }
diff --git a/toju-app/src/app/features/settings/settings-modal/settings-modal.component.html b/toju-app/src/app/features/settings/settings-modal/settings-modal.component.html
index 5598ccb..f15e59b 100644
--- a/toju-app/src/app/features/settings/settings-modal/settings-modal.component.html
+++ b/toju-app/src/app/features/settings/settings-modal/settings-modal.component.html
@@ -16,6 +16,7 @@
   <!-- Modal -->
   <div class="fixed inset-0 z-[91] flex items-center justify-center p-4 pointer-events-none">
     <div
+      appThemeNode="settingsModalSurface"
       class="pointer-events-auto relative flex w-full max-w-5xl overflow-hidden rounded-lg border border-border bg-card shadow-lg transition-all duration-200"
       style="height: min(720px, 88vh)"
       [class.scale-100]="animating()"
@@ -30,7 +31,10 @@
       tabindex="-1"
     >
       <!-- Side Navigation -->
-      <nav class="flex w-56 flex-shrink-0 flex-col border-r border-border bg-card">
+      <nav
+        appThemeNode="settingsModalNav"
+        class="flex w-56 flex-shrink-0 flex-col border-r border-border bg-card"
+      >
         <div class="border-b border-border px-3 py-3">
           <h2 class="text-lg font-semibold text-foreground">Settings</h2>
         </div>
@@ -116,7 +120,10 @@
       <!-- Content -->
       <div class="flex-1 flex flex-col min-w-0">
         <!-- Header -->
-        <div class="flex items-center justify-between border-b border-border px-5 py-3 flex-shrink-0">
+        <div
+          appThemeNode="settingsModalHeader"
+          class="flex items-center justify-between border-b border-border px-5 py-3 flex-shrink-0"
+        >
           <h3 class="text-lg font-semibold text-foreground">
             @switch (activePage()) {
               @case ('general') {
@@ -169,7 +176,10 @@
         </div>
 
         <!-- Scrollable Content Area -->
-        <div class="flex-1 overflow-y-auto bg-background px-4 py-4 sm:px-5 sm:py-4">
+        <div
+          appThemeNode="settingsModalContent"
+          class="flex-1 overflow-y-auto bg-background px-4 py-4 sm:px-5 sm:py-4"
+        >
           @switch (activePage()) {
             @case ('general') {
               <app-general-settings />
diff --git a/toju-app/src/app/features/settings/settings-modal/settings-modal.component.ts b/toju-app/src/app/features/settings/settings-modal/settings-modal.component.ts
index d752498..e42c03b 100644
--- a/toju-app/src/app/features/settings/settings-modal/settings-modal.component.ts
+++ b/toju-app/src/app/features/settings/settings-modal/settings-modal.component.ts
@@ -45,7 +45,11 @@ import { PermissionsSettingsComponent } from './permissions-settings/permissions
 import { DebuggingSettingsComponent } from './debugging-settings/debugging-settings.component';
 import { UpdatesSettingsComponent } from './updates-settings/updates-settings.component';
 import { THIRD_PARTY_LICENSES, type ThirdPartyLicense } from './third-party-licenses';
-import { ThemeLibraryService, ThemeService } from '../../../domains/theme';
+import {
+  ThemeLibraryService,
+  ThemeNodeDirective,
+  ThemeService
+} from '../../../domains/theme';
 
 @Component({
   selector: 'app-settings-modal',
@@ -63,7 +67,8 @@ import { ThemeLibraryService, ThemeService } from '../../../domains/theme';
     ServerSettingsComponent,
     MembersSettingsComponent,
     BansSettingsComponent,
-    PermissionsSettingsComponent
+    PermissionsSettingsComponent,
+    ThemeNodeDirective
   ],
   viewProviders: [
     provideIcons({
@@ -109,41 +114,19 @@ export class SettingsModalComponent {
   selectedSavedTheme = this.themeLibrary.selectedEntry;
 
   readonly globalPages: { id: SettingsPage; label: string; icon: string }[] = [
-    { id: 'general',
-      label: 'General',
-      icon: 'lucideSettings' },
-    { id: 'theme',
-      label: 'Theme Studio',
-      icon: 'lucidePalette' },
-    { id: 'network',
-      label: 'Network',
-      icon: 'lucideGlobe' },
-    { id: 'notifications',
-      label: 'Notifications',
-      icon: 'lucideBell' },
-    { id: 'voice',
-      label: 'Voice & Audio',
-      icon: 'lucideAudioLines' },
-    { id: 'updates',
-      label: 'Updates',
-      icon: 'lucideDownload' },
-    { id: 'debugging',
-      label: 'Debugging',
-      icon: 'lucideBug' }
+    { id: 'general', label: 'General', icon: 'lucideSettings' },
+    { id: 'theme', label: 'Theme Studio', icon: 'lucidePalette' },
+    { id: 'network', label: 'Network', icon: 'lucideGlobe' },
+    { id: 'notifications', label: 'Notifications', icon: 'lucideBell' },
+    { id: 'voice', label: 'Voice & Audio', icon: 'lucideAudioLines' },
+    { id: 'updates', label: 'Updates', icon: 'lucideDownload' },
+    { id: 'debugging', label: 'Debugging', icon: 'lucideBug' }
   ];
   readonly serverPages: { id: SettingsPage; label: string; icon: string }[] = [
-    { id: 'server',
-      label: 'Server',
-      icon: 'lucideSettings' },
-    { id: 'members',
-      label: 'Members',
-      icon: 'lucideUsers' },
-    { id: 'bans',
-      label: 'Bans',
-      icon: 'lucideBan' },
-    { id: 'permissions',
-      label: 'Permissions',
-      icon: 'lucideShield' }
+    { id: 'server', label: 'Server', icon: 'lucideSettings' },
+    { id: 'members', label: 'Members', icon: 'lucideUsers' },
+    { id: 'bans', label: 'Bans', icon: 'lucideBan' },
+    { id: 'permissions', label: 'Permissions', icon: 'lucideShield' }
   ];
 
   manageableRooms = computed<Room[]>(() => {
@@ -153,16 +136,18 @@ export class SettingsModalComponent {
       return [];
 
     return this.savedRooms().filter((room) => {
-      const viewedRoom = this.currentRoom()?.id === room.id ? this.currentRoom() ?? room : room;
+      const viewedRoom = this.currentRoom()?.id === room.id ? (this.currentRoom() ?? room) : room;
       const role = resolveLegacyRole(viewedRoom, user);
 
-      return role === 'host'
-        || resolveRoomPermission(viewedRoom, user, 'manageServer')
-        || resolveRoomPermission(viewedRoom, user, 'manageRoles')
-        || resolveRoomPermission(viewedRoom, user, 'manageChannels')
-        || resolveRoomPermission(viewedRoom, user, 'manageBans')
-        || resolveRoomPermission(viewedRoom, user, 'kickMembers')
-        || resolveRoomPermission(viewedRoom, user, 'banMembers');
+      return (
+        role === 'host' ||
+        resolveRoomPermission(viewedRoom, user, 'manageServer') ||
+        resolveRoomPermission(viewedRoom, user, 'manageRoles') ||
+        resolveRoomPermission(viewedRoom, user, 'manageChannels') ||
+        resolveRoomPermission(viewedRoom, user, 'manageBans') ||
+        resolveRoomPermission(viewedRoom, user, 'kickMembers') ||
+        resolveRoomPermission(viewedRoom, user, 'banMembers')
+      );
     });
   });
 
@@ -187,21 +172,23 @@ export class SettingsModalComponent {
     if (!server || !user)
       return null;
 
-    return resolveLegacyRole(this.currentRoom()?.id === server.id ? this.currentRoom() ?? server : server, user);
+    return resolveLegacyRole(this.currentRoom()?.id === server.id ? (this.currentRoom() ?? server) : server, user);
   });
 
   canAccessSelectedServer = computed(() => {
     const server = this.selectedServer();
     const user = this.currentUser();
 
-    return !!server && !!user && (
-      resolveLegacyRole(server, user) === 'host'
-      || resolveRoomPermission(server, user, 'manageServer')
-      || resolveRoomPermission(server, user, 'manageRoles')
-      || resolveRoomPermission(server, user, 'manageChannels')
-      || resolveRoomPermission(server, user, 'manageBans')
-      || resolveRoomPermission(server, user, 'kickMembers')
-      || resolveRoomPermission(server, user, 'banMembers')
+    return (
+      !!server &&
+      !!user &&
+      (resolveLegacyRole(server, user) === 'host' ||
+        resolveRoomPermission(server, user, 'manageServer') ||
+        resolveRoomPermission(server, user, 'manageRoles') ||
+        resolveRoomPermission(server, user, 'manageChannels') ||
+        resolveRoomPermission(server, user, 'manageBans') ||
+        resolveRoomPermission(server, user, 'kickMembers') ||
+        resolveRoomPermission(server, user, 'banMembers'))
     );
   });
 
@@ -209,11 +196,13 @@ export class SettingsModalComponent {
     const server = this.selectedServer();
     const user = this.currentUser();
 
-    return !!server && !!user && (
-      resolveLegacyRole(server, user) === 'host'
-      || resolveRoomPermission(server, user, 'manageRoles')
-      || resolveRoomPermission(server, user, 'kickMembers')
-      || resolveRoomPermission(server, user, 'banMembers')
+    return (
+      !!server &&
+      !!user &&
+      (resolveLegacyRole(server, user) === 'host' ||
+        resolveRoomPermission(server, user, 'manageRoles') ||
+        resolveRoomPermission(server, user, 'kickMembers') ||
+        resolveRoomPermission(server, user, 'banMembers'))
     );
   });
 
@@ -221,20 +210,19 @@ export class SettingsModalComponent {
     const server = this.selectedServer();
     const user = this.currentUser();
 
-    return !!server && !!user && (
-      resolveLegacyRole(server, user) === 'host'
-      || resolveRoomPermission(server, user, 'manageBans')
-    );
+    return !!server && !!user && (resolveLegacyRole(server, user) === 'host' || resolveRoomPermission(server, user, 'manageBans'));
   });
 
   canManageSelectedPermissions = computed(() => {
     const server = this.selectedServer();
     const user = this.currentUser();
 
-    return !!server && !!user && (
-      resolveLegacyRole(server, user) === 'host'
-      || resolveRoomPermission(server, user, 'manageRoles')
-      || resolveRoomPermission(server, user, 'manageServer')
+    return (
+      !!server &&
+      !!user &&
+      (resolveLegacyRole(server, user) === 'host' ||
+        resolveRoomPermission(server, user, 'manageRoles') ||
+        resolveRoomPermission(server, user, 'manageServer'))
     );
   });
 
@@ -259,9 +247,8 @@ export class SettingsModalComponent {
       const hasSelected = !!selectedId && rooms.some((room) => room.id === selectedId);
 
       if (!hasSelected) {
-        const fallbackId = [targetId, currentRoomId].find((candidateId) =>
-          !!candidateId && rooms.some((room) => room.id === candidateId)
-        ) ?? rooms[0]?.id ?? null;
+        const fallbackId =
+          [targetId, currentRoomId].find((candidateId) => !!candidateId && rooms.some((room) => room.id === candidateId)) ?? rooms[0]?.id ?? null;
 
         this.selectedServerId.set(fallbackId);
       }
diff --git a/toju-app/src/app/shared/components/confirm-dialog/confirm-dialog.component.html b/toju-app/src/app/shared/components/confirm-dialog/confirm-dialog.component.html
index b753b8b..06cc4ce 100644
--- a/toju-app/src/app/shared/components/confirm-dialog/confirm-dialog.component.html
+++ b/toju-app/src/app/shared/components/confirm-dialog/confirm-dialog.component.html
@@ -11,6 +11,7 @@
 
 <!-- Dialog -->
 <div
+  appThemeNode="confirmDialogSurface"
   class="fixed z-50 left-1/2 top-1/2 -translate-x-1/2 -translate-y-1/2 bg-card border border-border rounded-lg shadow-lg"
   [class]="widthClass()"
 >
diff --git a/toju-app/src/app/shared/components/confirm-dialog/confirm-dialog.component.ts b/toju-app/src/app/shared/components/confirm-dialog/confirm-dialog.component.ts
index c288311..2dd4c8b 100644
--- a/toju-app/src/app/shared/components/confirm-dialog/confirm-dialog.component.ts
+++ b/toju-app/src/app/shared/components/confirm-dialog/confirm-dialog.component.ts
@@ -4,10 +4,12 @@ import {
   output,
   HostListener
 } from '@angular/core';
+import { ThemeNodeDirective } from '../../../domains/theme';
 
 @Component({
   selector: 'app-confirm-dialog',
   standalone: true,
+  imports: [ThemeNodeDirective],
   templateUrl: './confirm-dialog.component.html',
   host: {
     style: 'display: contents;'
diff --git a/toju-app/src/app/shared/components/context-menu/context-menu.component.html b/toju-app/src/app/shared/components/context-menu/context-menu.component.html
index f352ab0..35db0ab 100644
--- a/toju-app/src/app/shared/components/context-menu/context-menu.component.html
+++ b/toju-app/src/app/shared/components/context-menu/context-menu.component.html
@@ -12,6 +12,7 @@
 <!-- Positioned menu panel -->
 <div
   #panel
+  appThemeNode="contextMenuSurface"
   class="fixed z-50 bg-card border border-border rounded-lg shadow-lg py-1"
   [class]="widthPx() ? '' : width()"
   [style.left.px]="clampedX()"
diff --git a/toju-app/src/app/shared/components/context-menu/context-menu.component.ts b/toju-app/src/app/shared/components/context-menu/context-menu.component.ts
index 8284485..f9a3647 100644
--- a/toju-app/src/app/shared/components/context-menu/context-menu.component.ts
+++ b/toju-app/src/app/shared/components/context-menu/context-menu.component.ts
@@ -9,10 +9,12 @@ import {
   AfterViewInit,
   OnInit
 } from '@angular/core';
+import { ThemeNodeDirective } from '../../../domains/theme';
 
 @Component({
   selector: 'app-context-menu',
   standalone: true,
+  imports: [ThemeNodeDirective],
   templateUrl: './context-menu.component.html',
   styleUrl: './context-menu.component.scss'
 })
diff --git a/toju-app/src/app/shared/components/profile-card/profile-card.component.html b/toju-app/src/app/shared/components/profile-card/profile-card.component.html
index 4b5086e..810e342 100644
--- a/toju-app/src/app/shared/components/profile-card/profile-card.component.html
+++ b/toju-app/src/app/shared/components/profile-card/profile-card.component.html
@@ -1,4 +1,5 @@
 <div
+  appThemeNode="profileCardSurface"
   class="w-72 rounded-lg border border-border bg-card shadow-xl"
   style="animation: profile-card-in 120ms cubic-bezier(0.2, 0, 0, 1) both"
 >
@@ -8,7 +9,10 @@
   @let statusColor = currentStatusColor();
   @let statusLabel = currentStatusLabel();
 
-  <div class="h-20 rounded-t-lg bg-gradient-to-r from-primary/30 to-primary/10"></div>
+  <div
+    appThemeNode="profileCardBanner"
+    class="h-20 rounded-t-lg bg-gradient-to-r from-primary/30 to-primary/10"
+  ></div>
 
   <div class="relative px-4">
     <div class="-mt-8">
@@ -36,7 +40,10 @@
     </div>
   </div>
 
-  <div class="px-4 pb-3 pt-2.5">
+  <div
+    appThemeNode="profileCardBody"
+    class="px-4 pb-3 pt-2.5"
+  >
     @if (isEditable) {
       <div class="space-y-2">
         <div>
diff --git a/toju-app/src/app/shared/components/profile-card/profile-card.component.ts b/toju-app/src/app/shared/components/profile-card/profile-card.component.ts
index f27b4dd..e80e2cb 100644
--- a/toju-app/src/app/shared/components/profile-card/profile-card.component.ts
+++ b/toju-app/src/app/shared/components/profile-card/profile-card.component.ts
@@ -21,6 +21,7 @@ import {
 } from '../../../domains/profile-avatar';
 import { UsersActions } from '../../../store/users/users.actions';
 import { selectUsersEntities } from '../../../store/users/users.selectors';
+import { ThemeNodeDirective } from '../../../domains/theme';
 
 @Component({
   selector: 'app-profile-card',
@@ -28,15 +29,14 @@ import { selectUsersEntities } from '../../../store/users/users.selectors';
   imports: [
     CommonModule,
     NgIcon,
-    UserAvatarComponent
+    UserAvatarComponent,
+    ThemeNodeDirective
   ],
   viewProviders: [provideIcons({ lucideCheck, lucideChevronDown })],
   templateUrl: './profile-card.component.html'
 })
 export class ProfileCardComponent {
   readonly user = signal<User>({ id: '', oderId: '', username: '', displayName: '', status: 'offline', role: 'member', joinedAt: 0 });
-  private readonly store = inject(Store);
-  private readonly users = this.store.selectSignal(selectUsersEntities);
   readonly displayedUser = computed(() => {
     const snapshot = this.user();
     const entities = this.users();
@@ -60,42 +60,58 @@ export class ProfileCardComponent {
     { value: 'offline', label: 'Invisible', color: 'bg-gray-500' }
   ];
 
+  private readonly store = inject(Store);
+  private readonly users = this.store.selectSignal(selectUsersEntities);
   private readonly userStatus = inject(UserStatusService);
   private readonly profileAvatar = inject(ProfileAvatarFacade);
   private readonly profileAvatarEditor = inject(ProfileAvatarEditorService);
-  private readonly syncProfileDrafts = effect(() => {
-    const user = this.displayedUser();
-    const editingField = this.editingField();
+  private readonly syncProfileDrafts = effect(
+    () => {
+      const user = this.displayedUser();
+      const editingField = this.editingField();
 
-    if (editingField !== 'displayName') {
-      this.displayNameDraft.set(user.displayName || '');
-    }
+      if (editingField !== 'displayName') {
+        this.displayNameDraft.set(user.displayName || '');
+      }
 
-    if (editingField !== 'description') {
-      this.descriptionDraft.set(user.description || '');
-    }
-
-  }, { allowSignalWrites: true });
+      if (editingField !== 'description') {
+        this.descriptionDraft.set(user.description || '');
+      }
+    },
+    { allowSignalWrites: true }
+  );
 
   currentStatusColor(): string {
     switch (this.displayedUser().status) {
-      case 'online': return 'bg-green-500';
-      case 'away': return 'bg-yellow-500';
-      case 'busy': return 'bg-red-500';
-      case 'offline': return 'bg-gray-500';
-      case 'disconnected': return 'bg-gray-500';
-      default: return 'bg-green-500';
+      case 'online':
+        return 'bg-green-500';
+      case 'away':
+        return 'bg-yellow-500';
+      case 'busy':
+        return 'bg-red-500';
+      case 'offline':
+        return 'bg-gray-500';
+      case 'disconnected':
+        return 'bg-gray-500';
+      default:
+        return 'bg-green-500';
     }
   }
 
   currentStatusLabel(): string {
     switch (this.displayedUser().status) {
-      case 'online': return 'Online';
-      case 'away': return 'Away';
-      case 'busy': return 'Do Not Disturb';
-      case 'offline': return 'Invisible';
-      case 'disconnected': return 'Offline';
-      default: return 'Online';
+      case 'online':
+        return 'Online';
+      case 'away':
+        return 'Away';
+      case 'busy':
+        return 'Do Not Disturb';
+      case 'offline':
+        return 'Invisible';
+      case 'disconnected':
+        return 'Offline';
+      default:
+        return 'Online';
     }
   }
 
@@ -111,9 +127,7 @@ export class ProfileCardComponent {
   isStatusOptionSelected(status: UserStatus | null): boolean {
     const currentStatus = this.displayedUser().status;
 
-    return status === null
-      ? currentStatus === 'online'
-      : currentStatus === status;
+    return status === null ? currentStatus === 'online' : currentStatus === status;
   }
 
   onDisplayNameInput(event: Event): void {
@@ -223,10 +237,7 @@ export class ProfileCardComponent {
     const user = this.displayedUser();
     const description = this.normalizeDescription(this.descriptionDraft());
 
-    if (
-      displayName === this.normalizeDisplayName(user.displayName)
-      && description === this.normalizeDescription(user.description)
-    ) {
+    if (displayName === this.normalizeDisplayName(user.displayName) && description === this.normalizeDescription(user.description)) {
       return;
     }
 
diff --git a/toju-app/src/app/shared/components/screen-share-source-picker/screen-share-source-picker.component.html b/toju-app/src/app/shared/components/screen-share-source-picker/screen-share-source-picker.component.html
index e61c1ae..c8c6bde 100644
--- a/toju-app/src/app/shared/components/screen-share-source-picker/screen-share-source-picker.component.html
+++ b/toju-app/src/app/shared/components/screen-share-source-picker/screen-share-source-picker.component.html
@@ -11,6 +11,7 @@
 
   <div class="fixed inset-0 z-[111] flex items-center justify-center p-4 pointer-events-none">
     <section
+      appThemeNode="screenShareSourcePicker"
       class="pointer-events-auto w-full max-w-6xl rounded-2xl border border-border bg-card shadow-2xl"
       (click)="$event.stopPropagation()"
       (keydown.enter)="$event.stopPropagation()"
@@ -124,6 +125,7 @@
             @for (source of filteredSources(); track trackSource($index, source)) {
               <button
                 #sourceButton
+                appThemeNode="screenShareSourceCard"
                 type="button"
                 class="rounded-xl border px-4 py-4 text-left transition-colors screen-share-source-picker__source"
                 [attr.aria-pressed]="selectedSourceId() === source.id"
diff --git a/toju-app/src/app/shared/components/screen-share-source-picker/screen-share-source-picker.component.ts b/toju-app/src/app/shared/components/screen-share-source-picker/screen-share-source-picker.component.ts
index 8994eb9..ea89edf 100644
--- a/toju-app/src/app/shared/components/screen-share-source-picker/screen-share-source-picker.component.ts
+++ b/toju-app/src/app/shared/components/screen-share-source-picker/screen-share-source-picker.component.ts
@@ -14,11 +14,16 @@ import {
   ScreenShareSourceOption,
   ScreenShareSourcePickerService
 } from '../../../domains/screen-share';
+import { ThemeNodeDirective } from '../../../domains/theme';
 
 @Component({
   selector: 'app-screen-share-source-picker',
   standalone: true,
-  imports: [CommonModule, NgOptimizedImage],
+  imports: [
+    CommonModule,
+    NgOptimizedImage,
+    ThemeNodeDirective
+  ],
   templateUrl: './screen-share-source-picker.component.html',
   styleUrl: './screen-share-source-picker.component.scss',
   host: {
@@ -32,9 +37,7 @@ export class ScreenShareSourcePickerComponent {
   readonly screenSources = computed(() => this.sources().filter((source) => source.kind === 'screen'));
   readonly windowSources = computed(() => this.sources().filter((source) => source.kind === 'window'));
   readonly filteredSources = computed(() => {
-    return this.activeTab() === 'screen'
-      ? this.screenSources()
-      : this.windowSources();
+    return this.activeTab() === 'screen' ? this.screenSources() : this.windowSources();
   });
   readonly hasOpenRequest = computed(() => !!this.request());
   readonly activeTab = signal<ScreenShareSourceKind>('screen');
@@ -46,9 +49,7 @@ export class ScreenShareSourcePickerComponent {
   constructor() {
     effect(() => {
       const request = this.request();
-      const defaultTab: ScreenShareSourceKind = request?.sources.some((source) => source.kind === 'screen')
-        ? 'screen'
-        : 'window';
+      const defaultTab: ScreenShareSourceKind = request?.sources.some((source) => source.kind === 'screen') ? 'screen' : 'window';
 
       this.activeTab.set(defaultTab);
       this.includeSystemAudio.set(request?.includeSystemAudio ?? false);
@@ -68,9 +69,8 @@ export class ScreenShareSourcePickerComponent {
 
       window.requestAnimationFrame(() => {
         const activeSourceId = this.selectedSourceId();
-        const targetButton = this.sourceButtons().find(
-          (button) => button.nativeElement.dataset['sourceId'] === activeSourceId
-        ) ?? this.sourceButtons()[0];
+        const targetButton =
+          this.sourceButtons().find((button) => button.nativeElement.dataset['sourceId'] === activeSourceId) ?? this.sourceButtons()[0];
 
         targetButton?.nativeElement.focus();
       });
@@ -125,8 +125,6 @@ export class ScreenShareSourcePickerComponent {
   }
 
   private getTabSources(tab: ScreenShareSourceKind): ScreenShareSourceOption[] {
-    return tab === 'screen'
-      ? this.screenSources()
-      : this.windowSources();
+    return tab === 'screen' ? this.screenSources() : this.windowSources();
   }
 }