/* ============================================================
   Gallery page — masonry grid + lightbox
   Imported only by gallery.html
   ============================================================ */

/* ── Gallery section ──────────────────────────────────────── */
.gallery-section {
  container-type: inline-size;
  position: relative;
  z-index: 1;
  padding-block: var(--space-2xl);
  padding-inline: var(--space-lg);
}

/* ── Gallery grid ────────────────────────────────────────── */
/* Base: regular CSS grid — universal fallback */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: var(--space-md);
  align-items: start; /* prevent image stretching in fixed row tracks */
}

/* Enhancement: CSS Grid Lanes (masonry) — CSS Grid Layout Level 3, Jan 2025 resolution.
   Self-contained so cascade from the base rule doesn't bleed in unexpectedly.
   align-items: normal resets the start override — in grid-lanes, alignment only
   applies to items adjacent to a gap, not uniformly (W3C CSS Grid 3 spec). */
@supports (display: grid-lanes) {
  .gallery-grid {
    display: grid-lanes;
    grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
    gap: var(--space-md);
    align-items: normal;
  }
}

.gallery-item {
  /* wrapper kept for JS convenience; no column-break properties needed in grid */
}

.gallery-thumb-btn {
  display: block;
  inline-size: 100%;
  padding: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.gallery-thumb-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px color-mix(in srgb, var(--color-text) 20%, transparent);
}

.gallery-thumb-btn img {
  inline-size: 100%;
  block-size: auto;
  display: block;
  border-radius: var(--radius-md);
}

.gallery-empty {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  text-align: center;
  padding-block: var(--space-2xl);
  grid-column: 1 / -1;
}

@media (prefers-reduced-motion: reduce) {
  .gallery-thumb-btn { transition: none; }
  .gallery-thumb-btn:hover { transform: none; box-shadow: none; }
}

/* ── Lightbox dialog ──────────────────────────────────────── */
#lightbox {
  /* Explicit centering — don't rely on UA stylesheet defaults */
  position: fixed;
  inset: 0;
  margin: auto;

  border: none;
  padding: 0;
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  color: var(--color-text);
  max-inline-size: min(95vw, 72rem);
  inline-size: min(95vw, 72rem);
  overflow: hidden;
  box-shadow: 0 24px 80px color-mix(in srgb, #000 60%, transparent);
}

#lightbox::backdrop {
  background: color-mix(in srgb, #000 75%, transparent);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* ── Lightbox inner — side-by-side on wide viewports ─────── */
.lightbox-inner {
  display: flex;
  flex-direction: column;
}

@media (min-width: 56rem) {
  #lightbox {
    block-size: min(90vh, 48rem);
  }

  .lightbox-inner {
    flex-direction: row;
    block-size: 100%;
  }
}

/* ── Photo area ───────────────────────────────────────────── */
.lightbox-photo-area {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  overflow: hidden;
  flex-shrink: 0;
  block-size: min(60vw, 50vh);
}

@media (min-width: 56rem) {
  .lightbox-photo-area {
    flex: 1;
    block-size: 100%;
    min-inline-size: 0;
  }
}

.lightbox-figure {
  display: contents;
}

.lightbox-img {
  max-inline-size: 100%;
  max-block-size: 100%;
  object-fit: contain;
  display: block;
}

/* ── Prev / Next nav buttons ──────────────────────────────── */
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, #000 55%, transparent);
  color: #fff;
  font-size: 1.75rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease;
}

.lightbox-prev { inset-inline-start: var(--space-sm); }
.lightbox-next { inset-inline-end: var(--space-sm); }

.lightbox-nav:hover {
  background: color-mix(in srgb, #000 80%, transparent);
}

.lightbox-nav:disabled {
  opacity: 0;
  pointer-events: none;
}

/* ── Metadata panel ───────────────────────────────────────── */
.lightbox-meta {
  flex-shrink: 0;
  overflow-y: auto;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  border-block-start: 1px solid var(--color-border);
  position: relative;
}

@media (min-width: 56rem) {
  .lightbox-meta {
    inline-size: 20rem;
    block-size: 100%;
    border-block-start: none;
    border-inline-start: 1px solid var(--color-border);
  }
}

.lightbox-close {
  position: absolute;
  inset-block-start: var(--space-sm);
  inset-inline-end: var(--space-sm);
  inline-size: 2rem;
  block-size: 2rem;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease;
  flex-shrink: 0;
}

.lightbox-close:hover {
  background: var(--color-surface-2);
}

.lightbox-description {
  margin-block-start: 2.5rem; /* clear the close button */
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
}

.lightbox-description[hidden] { display: none; }

/* ── EXIF data ────────────────────────────────────────────── */
.lightbox-exif {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.exif-row {
  display: flex;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  align-items: baseline;
}

.exif-row[hidden] { display: none; }

.exif-row dt {
  color: var(--color-text-muted);
  font-weight: 600;
  flex-shrink: 0;
  inline-size: 5.5rem;
}

.exif-row dd {
  color: var(--color-text);
}

/* ── Reduce motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .lightbox-nav,
  .lightbox-close { transition: none; }

  #lightbox::backdrop { backdrop-filter: none; -webkit-backdrop-filter: none; }
}