/* Wallpaper stays behind messages; headers and composer keep their surfaces. */
:root {
  --chat-wallpaper:var(--chat-wallpaper-light,none);
  --chat-wallpaper-color:#ffffff;
}
html[data-theme="dark"] {
  --chat-wallpaper:var(--chat-wallpaper-dark,none);
  --chat-wallpaper-color:#000000;
}
#appView .message-list,
#appView .room-chat-window .social-messages {
  background-color:var(--chat-wallpaper-color);
  background-image:var(--chat-wallpaper);
  background-position:center;
  background-size:cover;
  background-repeat:no-repeat;
}