/* ============================================
   GALLERY PAGE — Page-Specific Styles
   애플어학원 갤러리 페이지
   ============================================ */

/* ===== SECTION LABELS & TITLES ===== */
.section-label {
  display: inline-block;
  font-family: var(--font-accent);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-red);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

.section-header {
  margin-bottom: var(--space-2xl);
}

/* ===== PAGE HERO ===== */
.page-hero {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 8rem 0 5rem;
  text-align: center;
}

.page-hero .section-label {
  color: var(--color-accent-yellow);
}

.page-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-white);
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

.page-hero-desc {
  font-size: 1.125rem;
  color: var(--color-white);
  opacity: 0.85;
  max-width: 540px;
  margin: 0 auto;
}

/* ===== FILTER SECTION ===== */
.gallery-filter-section {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 10;
}

.gallery-filters {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
  justify-content: center;
}

.gallery-filter-btn {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  background-color: var(--color-white);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.gallery-filter-btn.active {
  background-color: var(--color-accent-red);
  border-color: var(--color-accent-red);
  color: var(--color-white);
}

/* ===== GALLERY GRID ===== */
.gallery-main {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-section);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

/* ===== GALLERY ITEM ===== */
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 4 / 3;
  display: block;
  text-decoration: none;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
  transition: transform var(--transition-normal);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(44, 39, 80, 0.5);
  opacity: 0;
  transition: opacity var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.gallery-item-caption {
  color: var(--color-white);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

  .page-hero {
    padding: 7rem 0 4rem;
  }

  .gallery-filter-btn {
    font-size: 0.875rem;
    padding: 0.4rem 1rem;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .page-hero {
    padding: 6rem 0 3rem;
  }

  .gallery-filters {
    gap: 0.375rem;
  }

  .gallery-filter-btn {
    font-size: 0.8125rem;
    padding: 0.35rem 0.75rem;
  }
}