/* ─────────────────────────────────────────────
   Scroll Reveal
   Usage: add class="reveal" to any element.
   Optional modifiers:
     reveal--from-left   (slides in from left)
     reveal--from-right  (slides in from right)
     reveal--from-bottom (default — slides up)
     reveal--from-top    (slides down)
     reveal--scale       (scales up from 95%)
   Optional data attributes:
     data-reveal-delay="200"   delay in ms before transition starts
     data-reveal-duration="600" transition duration in ms (default 600)
───────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity  0.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal--from-bottom { transform: translateY(28px); }
.reveal--from-top    { transform: translateY(-28px); }
.reveal--from-left   { transform: translateX(-36px); }
.reveal--from-right  { transform: translateX(36px); }
.reveal--scale       { transform: scale(0.95) translateY(16px); }

/* Visible state — applied/removed by IntersectionObserver */
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Respect user motion preference */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}