/**
 * Public component — Gallery + Lightbox (.pub-gallery / .pub-lightbox)
 * TASK-31 / STORY 3. Main image + thumbnail strip; fullscreen lightbox.
 * Behaviour: public/js/components/gallery.js.
 *
 * Render with {% pub_gallery images=... %} or follow the partial contract.
 * The lightbox element is shared and injected once by gallery.js.
 */

.pub-gallery {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* --- Main stage --- */
.pub-gallery__stage {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--surface-sunken);
}

.pub-gallery__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pub-gallery__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  background-color: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-standard);
}
.pub-gallery__arrow:hover {
  background-color: #ffffff;
}
.pub-gallery__arrow:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}
.pub-gallery__arrow--prev { left: var(--space-3); }
.pub-gallery__arrow--next { right: var(--space-3); }

.pub-gallery__counter {
  position: absolute;
  left: var(--space-3);
  bottom: var(--space-3);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: #ffffff;
  background-color: rgba(12, 35, 64, 0.78);
  border-radius: var(--radius-full);
}

.pub-gallery__expand {
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  background-color: rgba(255, 255, 255, 0.92);
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}
.pub-gallery__expand:hover { background-color: #ffffff; }
.pub-gallery__expand:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

/* --- Thumbnail strip --- */
.pub-gallery__thumbs {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: none;
  scroll-snap-type: x proximity;
}
.pub-gallery__thumbs::-webkit-scrollbar { display: none; }

.pub-gallery__thumb {
  flex: 0 0 auto;
  width: 5rem;
  aspect-ratio: 4 / 3;
  padding: 0;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: none;
  cursor: pointer;
  scroll-snap-align: start;
  opacity: 0.65;
  transition: opacity var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard);
}
.pub-gallery__thumb:hover { opacity: 1; }
.pub-gallery__thumb.is-active {
  opacity: 1;
  border-color: var(--color-accent);
}
.pub-gallery__thumb:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}
.pub-gallery__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 768px) {
  .pub-gallery__thumb { width: 6.5rem; }
}

/* --- Lightbox (injected once, shared) --- */
.pub-lightbox[hidden] { display: none; }

.pub-lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background-color: rgba(6, 14, 26, 0.94);
}

.pub-lightbox__image {
  max-width: 94vw;
  max-height: 84vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
}

.pub-lightbox__close,
.pub-lightbox__arrow {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-standard);
}
.pub-lightbox__close:hover,
.pub-lightbox__arrow:hover {
  background-color: rgba(255, 255, 255, 0.28);
}
.pub-lightbox__close:focus-visible,
.pub-lightbox__arrow:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-accent);
}

.pub-lightbox__close {
  top: var(--space-4);
  right: var(--space-4);
  width: 2.75rem;
  height: 2.75rem;
  font-size: var(--font-size-2xl);
}

.pub-lightbox__arrow {
  top: 50%;
  transform: translateY(-50%);
  width: 3rem;
  height: 3rem;
  font-size: var(--font-size-2xl);
}
.pub-lightbox__arrow--prev { left: var(--space-4); }
.pub-lightbox__arrow--next { right: var(--space-4); }

.pub-lightbox__counter {
  position: absolute;
  left: 50%;
  bottom: var(--space-5);
  transform: translateX(-50%);
  padding: var(--space-1) var(--space-4);
  font-size: var(--font-size-sm);
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-full);
}

body.pub-lightbox-open { overflow: hidden; }