/* Room atmosphere layer.
   Base room styles only. The actual atmosphere backgrounds are in
   atmosphere.css, keyed by body[data-atmosphere="..."].
   Frame-specific room gradients have been removed — atmosphere is now
   independent of the frame, selected randomly on each page load. */

.room {
  height: 100%;
  display: grid;
  place-items: center;
  padding: 2vmin;
  transition: background 1.2s ease;
  position: relative;
  overflow: hidden;
}