.case-background {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background: #171817 url('../assets/memory-ransom/garden-background-poster.jpg') center / cover no-repeat;
}
.case-background video { display: block; width: 100%; height: 100%; object-fit: cover; }
main { position: relative; z-index: 1; }
.chapter.hero,.world,.character,.script,.production,.making,.final { background: transparent; }
@media (prefers-reduced-motion: reduce) { .case-background video { display: none; } }