/* ==========================================================================
   EPIC CLUB - ACTIVITIES GALLERY "A YEAR OF IMPACT"
   Editorial photography showcase with asymmetric grid & lightbox
   ========================================================================== */

.impact-gallery-section {
  background-color: var(--ice);
  padding: 100px 0;
  position: relative;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.gallery-editorial-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 40px;
}

.gallery-editorial-title {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 800;
  line-height: 1.12;
  color: var(--midnight);
  margin-bottom: 16px;
  letter-spacing: -0.025em;
}

.gallery-editorial-subtitle {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Category Filter Bar */
.gallery-category-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.gallery-cat-btn {
  padding: 10px 22px;
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-full);
  background: #FFFFFF;
  color: var(--text-body);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all var(--tr-fast);
}

.gallery-cat-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.gallery-cat-btn.is-active {
  background: var(--midnight);
  color: #FFFFFF;
  border-color: var(--midnight);
  box-shadow: 0 4px 14px rgba(16, 42, 67, 0.25);
}

/* Sophisticated Asymmetric Editorial Grid */
.asymmetric-gallery-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 290px;
  gap: 24px;
  margin-bottom: 40px;
}

/* Grid Item Sizing Variants */
.gallery-tile {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-light);
  cursor: pointer;
  background-color: #FFFFFF;
  transition: all var(--tr-normal);
  display: flex;
  flex-direction: column;
}

.gallery-tile:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), 0 0 28px var(--cyan-glow);
  border-color: var(--cyan);
}

/* Asymmetric spans */
.gallery-tile.gallery-item-featured {
  grid-column: span 7;
  grid-row: span 2;
}

.gallery-tile.gallery-item-tall {
  grid-column: span 5;
  grid-row: span 2;
}

.gallery-tile.gallery-item-wide {
  grid-column: span 8;
  grid-row: span 1;
}

.gallery-tile.gallery-item-standard {
  grid-column: span 4;
  grid-row: span 1;
}

/* Photo Display */
.tile-image-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  background-color: var(--midnight);
}

.tile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-tile:hover .tile-photo {
  transform: scale(1.05);
}

/* Editorial Gradient & Hover Overlay */
.tile-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16, 42, 67, 0.1) 0%, rgba(16, 42, 67, 0.4) 45%, rgba(16, 42, 67, 0.92) 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  color: #FFFFFF;
  transition: opacity var(--tr-fast);
}

.tile-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.tile-category-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(16, 42, 67, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #FFFFFF;
}

.tile-verification-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tile-verification-badge.verified {
  background: rgba(53, 191, 163, 0.95);
  color: #FFFFFF;
  box-shadow: 0 0 12px rgba(53, 191, 163, 0.4);
}

.tile-verification-badge.placeholder {
  background: rgba(252, 228, 69, 0.95);
  color: var(--midnight);
  box-shadow: 0 0 12px rgba(252, 228, 69, 0.3);
}

.tile-bottom-content {
  transform: translateY(0);
  transition: transform var(--tr-normal);
}

.tile-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 6px;
  line-height: 1.25;
}

.gallery-item-featured .tile-title {
  font-size: 28px;
}

.tile-caption {
  font-size: 14px;
  color: #D8EEF5;
  line-height: 1.45;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tile-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: #9FB3C8;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.tile-zoom-hint {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #4FE3FA;
  font-weight: 700;
  font-size: 12px;
}

/* Dedicated Editorial Placeholder Artwork */
.tile-placeholder-canvas {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #EBF7FB 0%, #FFFFFF 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 30px;
  text-align: center;
  border: 2px dashed rgba(0, 184, 217, 0.35);
  position: relative;
  transition: all var(--tr-fast);
}

.gallery-tile:hover .tile-placeholder-canvas {
  background: linear-gradient(135deg, #E1F5FA 0%, #FFFFFF 100%);
  border-color: var(--cyan);
}

.tile-placeholder-icon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--cyan-subtle);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.tile-placeholder-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: #8C6F00;
  background: var(--yellow-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 8px;
  display: inline-block;
  border: 1px solid rgba(252, 228, 69, 0.45);
}

.tile-placeholder-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--midnight);
  margin-bottom: 6px;
  line-height: 1.3;
}

.tile-placeholder-desc {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 290px;
  line-height: 1.5;
  margin-bottom: 10px;
}

.tile-upload-hint {
  font-size: 11px;
  color: var(--cyan);
  font-weight: 700;
  font-family: var(--font-mono);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Upload System Notification Box */
.gallery-upload-guide-box {
  background: #FFFFFF;
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 24px 30px;
  margin-top: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  box-shadow: var(--shadow-sm);
}

.guide-box-content {
  display: flex;
  align-items: center;
  gap: 16px;
}

.guide-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--cyan-subtle);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.guide-box-content h4 {
  font-size: 16px;
  color: var(--midnight);
  margin-bottom: 3px;
}

.guide-box-content p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

/* Lightbox Modal */
.gallery-lightbox-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(11, 29, 48, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--tr-normal);
}

.gallery-lightbox-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox-dialog {
  max-width: 1060px;
  width: 100%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--midnight);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.15);
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
  transform: scale(0.96);
  transition: transform var(--tr-normal);
}

.gallery-lightbox-backdrop.is-open .lightbox-dialog {
  transform: scale(1);
}

.lightbox-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--tr-fast);
}

.lightbox-close-btn:hover {
  background: var(--cyan);
  border-color: var(--cyan);
}

.lightbox-img-area {
  width: 100%;
  max-height: 64vh;
  min-height: 380px;
  background: #0B1D30;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.lightbox-main-img {
  max-width: 100%;
  max-height: 64vh;
  object-fit: contain;
  display: block;
}

.lightbox-info-area {
  padding: 24px 32px;
  background: var(--midnight);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(16, 42, 67, 0.7);
  backdrop-filter: blur(8px);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  transition: all var(--tr-fast);
}

.lightbox-nav-btn:hover {
  background: var(--cyan);
  border-color: var(--cyan);
}

.lightbox-nav-btn.prev { left: 16px; }
.lightbox-nav-btn.next { right: 16px; }

/* Responsive adjustments for gallery */
@media (max-width: 1080px) {
  .asymmetric-gallery-grid {
    grid-template-columns: repeat(6, 1fr);
    grid-auto-rows: 260px;
  }
  .gallery-tile.gallery-item-featured {
    grid-column: span 6;
    grid-row: span 2;
  }
  .gallery-tile.gallery-item-tall {
    grid-column: span 6;
    grid-row: span 1;
  }
  .gallery-tile.gallery-item-wide {
    grid-column: span 6;
    grid-row: span 1;
  }
  .gallery-tile.gallery-item-standard {
    grid-column: span 3;
    grid-row: span 1;
  }
}

@media (max-width: 768px) {
  .gallery-editorial-title {
    font-size: 34px;
  }
  .gallery-editorial-subtitle {
    font-size: 16px;
  }
  .asymmetric-gallery-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 300px;
    gap: 16px;
  }
  .gallery-tile.gallery-item-featured,
  .gallery-tile.gallery-item-tall,
  .gallery-tile.gallery-item-wide,
  .gallery-tile.gallery-item-standard {
    grid-column: span 1;
    grid-row: span 1;
  }
  .lightbox-info-area {
    flex-direction: column;
    align-items: flex-start;
    padding: 18px 20px;
  }
  .gallery-upload-guide-box {
    flex-direction: column;
    text-align: center;
  }
  .guide-box-content {
    flex-direction: column;
    text-align: center;
  }
}