html {
  background-color: #121212;
  overflow: hidden;
}
body { 
  font-family: Arial, sans-serif; 
  padding: 10px;
  margin: 0px;
}
img { 
  margin-top: 10px; 
}
.wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  color: #f0f0f0;
}
.logotype{
  width: 140px;
  position: absolute;
}
#content {
  border: 1px solid rgb(52, 211, 153);
  padding: 5px;
  margin: 10px;
  max-width: 500px;
  box-shadow: 0px 0px 10px 0px rgb(52, 211, 153);
}
#qrcode {
  margin: 10px;
}
footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #f0f0f0;
  padding: 10px;
}
a {
  color: #f0f0f0;
  text-decoration: none;
}