/* Section type "gallery" — up to six images in a responsive grid, linked to
   the lightbox (js/lightbox.js listens on a[data-lightbox="post-gallery"]
   inside .post-image-gallery). Reads the layout's --page-* tokens. */

.rtsb-section {
  max-width: 1200px;
  margin: 3.5rem auto;
  padding: 0 1.5rem;
}

.rtsb-section__heading {
  margin: 0 0 1.5rem;
  font-family: var(--page-display, var(--font-display));
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
  text-align: center;
  color: var(--page-ink, var(--text-primary));
}

.rtsb-section--empty .rtsb-section__placeholder {
  margin: 0;
  padding: 1.25rem;
  border: 1px dashed var(--page-rule, var(--gray-200));
  border-radius: var(--border-radius);
  text-align: center;
  color: var(--page-muted, var(--text-secondary));
}

.rtsb-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.rtsb-gallery__item {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--border-radius);
  background: var(--page-rule, var(--gray-200));
}

.rtsb-gallery__item:first-child {
  grid-column: span 2;
  grid-row: span 2;
}

.rtsb-gallery__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}

.rtsb-gallery__item:hover .rtsb-gallery__img,
.rtsb-gallery__item:focus-visible .rtsb-gallery__img {
  transform: scale(1.04);
}

.rtsb-gallery__item:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

@media (max-width: 640px) {
  .rtsb-gallery {
    grid-template-columns: repeat(2, 1fr);
  }

  .rtsb-gallery__item:first-child {
    grid-column: span 2;
    grid-row: auto;
    aspect-ratio: 16 / 9;
  }
}