/* ==========================================================================
   Animations — refined entrance transitions, driven by IntersectionObserver
   ========================================================================== */

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 900ms var(--ease-premium), transform 900ms var(--ease-premium);
  will-change: opacity, transform;
}

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

[data-reveal="fade"] {
  transform: none;
}

[data-reveal-group] > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 800ms var(--ease-premium), transform 800ms var(--ease-premium);
}

[data-reveal-group].is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-group].is-visible > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-group].is-visible > *:nth-child(2) { transition-delay: 90ms; }
[data-reveal-group].is-visible > *:nth-child(3) { transition-delay: 180ms; }
[data-reveal-group].is-visible > *:nth-child(4) { transition-delay: 270ms; }
[data-reveal-group].is-visible > *:nth-child(5) { transition-delay: 360ms; }
[data-reveal-group].is-visible > *:nth-child(6) { transition-delay: 450ms; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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