/* ─────────────────────────────────────────────
   REVEAL · scroll-triggered animations
   X3D Studio — Cinematic Immersive
   ───────────────────────────────────────────── */

[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity var(--dur-cinematic) var(--ease-out-quart),
    transform var(--dur-cinematic) var(--ease-out-quart);
}

[data-reveal].is-in {
  opacity: 1;
  transform: translateY(0);
}

/* stagger children */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--dur-cinematic) var(--ease-out-quart),
    transform var(--dur-cinematic) var(--ease-out-quart);
}

[data-reveal-stagger].is-in > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: translateY(0); }
[data-reveal-stagger].is-in > *:nth-child(2) { transition-delay: 80ms; opacity: 1; transform: translateY(0); }
[data-reveal-stagger].is-in > *:nth-child(3) { transition-delay: 160ms; opacity: 1; transform: translateY(0); }
[data-reveal-stagger].is-in > *:nth-child(4) { transition-delay: 240ms; opacity: 1; transform: translateY(0); }
[data-reveal-stagger].is-in > *:nth-child(5) { transition-delay: 320ms; opacity: 1; transform: translateY(0); }
[data-reveal-stagger].is-in > *:nth-child(6) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  [data-reveal],
  [data-reveal-stagger] > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}