/*
File: assets/css/gallery.css
Purpose: Gallery grid, filters, and lightbox styling for BPSS.
Sections: Gallery grid, overlay, full gallery, filters, lightbox
*/

.gallery-section {
  background-color: var(--bpss-off-white);
  padding: var(--section-py) 0;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 200px;
  gap: 8px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.gallery-item:nth-child(1) {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-item:nth-child(5) {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background-color: var(--bpss-mid-gray);
}

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

.gallery-item:hover img {
  transform: scale(1.07);
}

.gallery-item:focus-visible {
  outline: 3px solid var(--bpss-orange);
  outline-offset: -3px;
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(26,122,46,0.0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
}

.gallery-item:hover .gallery-overlay {
  background: rgba(26,122,46,0.55);
}

.gallery-icon {
  font-size: 28px;
  color: var(--bpss-white);
  opacity: 0;
  transition: opacity var(--transition-base), transform var(--transition-base);
  transform: scale(0.8);
}

.gallery-item:hover .gallery-icon {
  opacity: 1;
  transform: scale(1);
}

@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 160px;
  }

  .gallery-item:nth-child(1) {
    grid-column: span 1;
    grid-row: span 1;
  }

  .gallery-item:nth-child(5) {
    grid-column: span 1;
    grid-row: span 1;
  }
}

.gallery-grid-full {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  grid-auto-rows: 220px;
}

@media (max-width: 768px) {
  .gallery-grid-full {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 160px;
  }
}

.gallery-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  justify-content: center;
}

.filter-btn {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--bpss-border);
  background: var(--bpss-white);
  color: var(--bpss-text-body);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.filter-btn.active {
  background-color: var(--bpss-green);
  color: var(--bpss-white);
  border-color: var(--bpss-green);
}

#lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.94);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#lightbox.open {
  display: flex;
}

#lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 60px rgba(0,0,0,0.5);
  user-select: none;
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  color: var(--bpss-white);
  font-size: 36px;
  cursor: pointer;
  z-index: 10;
  line-height: 1;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.15);
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.12);
  border: none;
  color: var(--bpss-white);
  font-size: 40px;
  cursor: pointer;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  z-index: 10;
}

.lightbox-prev {
  left: 16px;
}

.lightbox-next {
  right: 16px;
}

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

.lightbox-counter {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.7);
  font-family: var(--font-body);
  font-size: 14px;
  background: rgba(0,0,0,0.5);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
}

@media (max-width: 768px) {
  .lightbox-prev {
    left: 8px;
  }

  .lightbox-next {
    right: 8px;
  }

  .lightbox-prev,
  .lightbox-next {
    font-size: 28px;
    padding: 6px 12px;
  }

  .lightbox-close {
    top: 8px;
    right: 8px;
  }
}