/* GALERIA.CSS */

/* ---- Year Tabs ---- */
.gallery-tabs {
  display: flex;
  gap: 0;
  margin-bottom: var(--space-8, 2.5rem);
  border-bottom: 2px solid var(--color-border, #e5e7eb);
}

.gallery-tab {
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  padding: var(--space-3, 0.75rem) var(--space-6, 1.75rem);
  font-size: var(--font-size-sm, 0.875rem);
  font-weight: var(--font-weight-semibold, 600);
  color: var(--color-text-muted, #6b7280);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  letter-spacing: 0.02em;
}

.gallery-tab:hover { color: var(--color-primary, #1d4ed8); }

.gallery-tab.is-active {
  color: var(--color-primary, #1d4ed8);
  border-bottom-color: var(--color-primary, #1d4ed8);
}

/* ---- Panels ---- */
.gallery-panel { display: none; }

.gallery-panel.is-active {
  display: block;
  animation: galleryFadeIn 0.35s ease;
}

@keyframes galleryFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Grid ---- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3, 0.75rem);
}

@media (max-width: 1024px) { .gallery-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px)  { .gallery-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---- Gallery Item ---- */
.gallery-item {
  position: relative;
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  cursor: zoom-in;
  aspect-ratio: 4 / 3;
  background: var(--color-surface, #f3f4f6);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
  image-rendering: auto;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease;
}

.gallery-item__overlay svg {
  color: #fff;
  opacity: 0;
  transform: scale(0.75);
  transition: opacity 0.3s ease, transform 0.3s ease;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5));
}

.gallery-item:hover img                { transform: scale(1.06); }
.gallery-item:hover .gallery-item__overlay { background: rgba(0, 0, 0, 0.38); }
.gallery-item:hover .gallery-item__overlay svg {
  opacity: 1;
  transform: scale(1);
}

/* ---- Lazy load states ---- */
.gallery-item--pending {
  display: none;
}

.gallery-item--reveal {
  animation: galleryFadeIn 0.4s ease both;
}

.gallery-sentinel {
  height: 1px;
  width: 100%;
}

/* ---- Lightbox ---- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.lightbox.is-open {
  opacity: 1;
  pointer-events: all;
}

.lightbox__body {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: calc(100vw - 160px);
  max-height: 100dvh;
  padding: var(--space-4, 1rem) 0;
}

.lightbox__img {
  max-width: 100%;
  max-height: 82vh;
  object-fit: contain;
  border-radius: var(--radius-md, 8px);
  display: block;
  box-shadow: 0 24px 64px rgba(0,0,0,0.6);
  transition: opacity 0.2s ease;
}

.lightbox__img.is-loading { opacity: 0.4; }

.lightbox__counter {
  color: rgba(255, 255, 255, 0.55);
  font-size: var(--font-size-sm, 0.875rem);
  margin-top: var(--space-3, 0.75rem);
  letter-spacing: 0.04em;
}

.lightbox__close {
  position: absolute;
  top: var(--space-4, 1rem);
  right: var(--space-4, 1rem);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.lightbox__close:hover { background: rgba(255, 255, 255, 0.22); }

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  font-size: 2.75rem;
  line-height: 1;
  cursor: pointer;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.lightbox__nav:hover { background: rgba(255, 255, 255, 0.24); }
.lightbox__nav--prev { left:  var(--space-4, 1rem); }
.lightbox__nav--next { right: var(--space-4, 1rem); }

@media (max-width: 640px) {
  .gallery-tabs { gap: 0; }
  .gallery-tab  { padding: var(--space-2, 0.5rem) var(--space-4, 1rem); font-size: var(--font-size-xs, 0.75rem); }
  .lightbox__body { max-width: calc(100vw - 96px); }
  .lightbox__nav  { width: 40px; height: 40px; font-size: 2rem; }
  .lightbox__nav--prev { left:  var(--space-2, 0.5rem); }
  .lightbox__nav--next { right: var(--space-2, 0.5rem); }
}