.app-thumb .app-preview {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms ease;
}
.app-thumb.preview-playing .app-preview { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  .app-thumb .app-preview { display: none; }
  .app-card:hover .app-thumb img { transform: none; }
}