/* ============================================================
   SeaRendipity — Gallery page (Phase 5)
   Responsive image grid + dependency-free lightbox.
   Depends on tokens.css (+ base.css helpers, pages.css primitives).
   Linked only on images.html.
   ============================================================ */

/* ------------------------------ GRID ------------------------------ */
.gallery-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: clamp(0.5rem, 0.2rem + 1vw, 1rem);
}
.gallery-grid > li { margin: 0; }

.gallery-item {
  display: block;
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-sand-soft);
  box-shadow: var(--shadow-sm);
  cursor: zoom-in;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur) var(--ease);
}
.gallery-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,60,72,0) 55%, rgba(0,60,72,0.55) 100%);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.gallery-item:hover img,
.gallery-item:focus-visible img { transform: scale(1.06); }
.gallery-item:hover::after,
.gallery-item:focus-visible::after { opacity: 1; }
.gallery-item__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: var(--space-4) var(--space-4) var(--space-3);
  color: #fff;
  font-size: var(--fs-small);
  line-height: 1.35;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.gallery-item:hover .gallery-item__caption,
.gallery-item:focus-visible .gallery-item__caption {
  opacity: 1;
  transform: translateY(0);
}