/* ============================================
   RC PAINTING — GALLERY PAGE STYLES
   css/gallery.css
   ============================================ */

/* Gallery page hero */
.page-hero {
  min-height: 60vh;
}

.page-hero--image {
  display: flex;
  align-items: center;
  background:
    linear-gradient(to right, rgba(28, 28, 30, 0.88) 0%, rgba(28, 28, 30, 0.55) 100%),
    url('../images/gallery-hero.jpg') center / cover no-repeat;
}

/* ============================================
   GALLERY SECTION
   ============================================ */
.gallery-section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-8);
  background-color: var(--color-white);
}

/* Filter buttons */
.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-7);
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-family);
  font-size: var(--text-sm);
  font-weight: var(--font-600);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-secondary);
  background-color: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
  outline: none;
}

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

.filter-btn.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text-inverse);
}

.filter-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.filter-btn[hidden] {
  display: none;
}

/* Masonry grid — CSS columns */
.gallery-grid {
  columns: 1;
  column-gap: var(--space-4);
}

.gallery-item {
  display: block;
  break-inside: avoid;
  margin-bottom: var(--space-4);
  overflow: hidden;
  border-radius: var(--radius-md);
  cursor: pointer;
}

.gallery-item img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  transition: transform var(--transition-slow), opacity var(--transition-base);
}

.gallery-item:hover img {
  transform: scale(1.04);
  opacity: 0.88;
}

.gallery-empty {
  text-align: center;
  padding-block: var(--space-9);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  column-span: all;
}

@media (min-width: 768px) {
  .gallery-section {
    padding-block: var(--space-9);
  }

  .gallery-grid {
    columns: 2;
    column-gap: var(--space-5);
  }

  .gallery-item {
    margin-bottom: var(--space-5);
  }
}

@media (min-width: 1024px) {
  .gallery-grid {
    columns: 3;
  }
}

/* ============================================
   LIGHTBOX
   ============================================ */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: rgba(28, 28, 30, 0.96);
  align-items: center;
  justify-content: center;
  padding: var(--space-7);
}

.lightbox.is-open {
  display: flex;
}

body.lightbox-open {
  overflow: hidden;
}

.lightbox-img {
  display: block;
  max-width: min(90vw, 1100px);
  max-height: 82vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.lightbox-close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  color: var(--color-text-inverse);
  font-size: var(--text-3xl);
  line-height: 1;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  outline: none;
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-close:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.lightbox-prev,
.lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: rgba(250, 250, 247, 0.12);
  border: 1px solid rgba(250, 250, 247, 0.15);
  border-radius: var(--radius-full);
  color: var(--color-text-inverse);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  outline: none;
}

.lightbox-prev {
  left: var(--space-5);
}

.lightbox-next {
  right: var(--space-5);
}

.lightbox-prev:hover,
.lightbox-next:hover {
  background-color: rgba(250, 250, 247, 0.25);
}

.lightbox-prev:disabled,
.lightbox-next:disabled {
  opacity: 0.2;
  cursor: default;
}

.lightbox-prev:focus-visible,
.lightbox-next:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.lightbox-counter {
  position: absolute;
  bottom: var(--space-5);
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--text-xs);
  font-weight: var(--font-500);
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-muted);
  white-space: nowrap;
}