/* ===== Reveal on scroll ===== */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translate3d(0, 28px, 0);
  transition:
    opacity 0.9s cubic-bezier(0.22, 0.61, 0.36, 1),
    transform 0.9s cubic-bezier(0.22, 0.61, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
}
.js-reveal [data-reveal="fade"] {
  transform: none;
}
.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ===== Pinned photo stacks (desktop only) ===== */
@media (min-width: 1024px) {
  .stack.is-pinned {
    --pin-h: calc(100vh - var(--header-h));
    --step: 90vh; /* how much scroll one photo change takes */
    height: calc(var(--pin-h) + (var(--frames) - 1) * var(--step));
  }
  .stack.is-pinned .stack__pin {
    position: sticky;
    top: var(--header-h);
    height: var(--pin-h);
    overflow: hidden;
  }
  .stack.is-pinned .stack__img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    will-change: opacity, transform;
  }
}

@media (prefers-reduced-motion: reduce) {
  .js-reveal [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}