#game-motion-layer {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10000;
}
#game-motion-layer[hidden] { display: none; }
@media (prefers-reduced-motion: reduce) {
  #game-motion-layer { display: none; }
}
.reduced-motion #game-motion-layer { display: none; }