/* ============================================
   Gallery Section
   ============================================ */
.gallery-section {
  background: var(--color-bg-alt);
}

.gallery-filters {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-light);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border);
  background: transparent;
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 250px;
  gap: 12px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.gallery-item.hidden {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.gallery-item-tall {
  grid-row: span 2;
}

.gallery-item-wide {
  grid-column: span 2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.gallery-item:hover .gallery-item-overlay {
  opacity: 1;
}

.gallery-item-overlay span {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 500;
}

/* ============================================
   Lightbox
   ============================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 85vh;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-content img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.lightbox.active .lightbox-content img {
  transform: scale(1);
}

.lightbox-caption {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  margin-top: 12px;
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  color: #fff;
  font-size: 2.5rem;
  line-height: 1;
  z-index: 2001;
  transition: transform var(--transition-fast);
  background: none;
  border: none;
  cursor: pointer;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-close:hover {
  transform: scale(1.2);
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-size: 2rem;
  z-index: 2001;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255,255,255,0.25);
}