/* =============================================================================
   Gallery CSS — Photos Page, Filters, Masonry, Lightbox Overrides
   NSTU Photography Portfolio
   ============================================================================= */

/* =============================================================================
   1. FILTER BAR
   ============================================================================= */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
}

.filter-bar__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.filter-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.filter-tag {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 0.45em 1em;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  background: transparent;
  cursor: pointer;
  transition:
    background var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
  border-radius: 1px;
}

.filter-tag:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.filter-tag.active {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-white);
}

/* Layout toggle */
.layout-toggle {
  display: flex;
  gap: var(--space-2);
  margin-left: auto;
}

.layout-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  background: transparent;
  cursor: pointer;
  transition: all var(--duration-base);
}

.layout-btn.active,
.layout-btn:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

/* =============================================================================
   2. MASONRY LAYOUT
   ============================================================================= */
.gallery-masonry {
  columns: 3;
  column-gap: var(--space-3);
}

.gallery-masonry .photo-card {
  break-inside: avoid;
  margin-bottom: var(--space-3);
  display: block;
}

.gallery-masonry .photo-card__img-wrap {
  aspect-ratio: unset;
}

.gallery-masonry .photo-card__img {
  height: auto;
}

@media (max-width: 1200px) {
  .gallery-masonry { columns: 3; }
}

@media (max-width: 900px) {
  .gallery-masonry { columns: 2; }
}

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

/* =============================================================================
   3. GRID LAYOUT
   ============================================================================= */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.gallery-grid .photo-card__img-wrap {
  aspect-ratio: 1 / 1;
}

.gallery-grid[data-cols="2"] {
  grid-template-columns: repeat(2, 1fr);
}

.gallery-grid[data-cols="4"] {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 900px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid[data-cols="4"] { grid-template-columns: repeat(2, 1fr); }
}

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

/* =============================================================================
   4. LIGHTGALLERY OVERRIDES
   ============================================================================= */
.lg-backdrop {
  background-color: rgba(5, 5, 5, 0.97) !important;
}

.lg-toolbar {
  background: linear-gradient(to bottom, rgba(0,0,0,0.6), transparent) !important;
  height: 60px !important;
}

.lg-toolbar .lg-icon {
  color: rgba(255, 255, 255, 0.7) !important;
  transition: color 0.2s !important;
}

.lg-toolbar .lg-icon:hover {
  color: #ffffff !important;
}

.lg-actions .lg-prev,
.lg-actions .lg-next {
  background: rgba(255, 255, 255, 0.08) !important;
  border: 1px solid rgba(255, 255, 255, 0.12) !important;
  border-radius: 0 !important;
  color: #fff !important;
  transition: background 0.2s !important;
}

.lg-actions .lg-prev:hover,
.lg-actions .lg-next:hover {
  background: rgba(255, 255, 255, 0.18) !important;
}

/* Sub-html (caption/EXIF panel) */
.lg-sub-html {
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent) !important;
  padding: 24px 40px !important;
  text-align: left !important;
}

.lg-sub-html h4 {
  font-family: 'Playfair Display', Georgia, serif !important;
  font-size: 1.25rem !important;
  font-weight: 600 !important;
  color: #ffffff !important;
  margin-bottom: 6px !important;
}

.lg-sub-html .photo-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 10px;
}

.lg-sub-html .photo-meta span {
  font-size: 0.75rem !important;
  color: rgba(255, 255, 255, 0.55) !important;
  letter-spacing: 0.06em;
}

.lg-sub-html .photo-caption {
  font-size: 0.875rem !important;
  color: rgba(255, 255, 255, 0.72) !important;
  margin-top: 6px !important;
  line-height: 1.6 !important;
  max-width: 600px;
}

/* Counter */
.lg-counter {
  font-family: 'Inter', sans-serif !important;
  font-size: 0.75rem !important;
  letter-spacing: 0.08em !important;
  color: rgba(255,255,255,0.5) !important;
}

/* Thumbnail strip */
.lg-thumb-outer {
  background: rgba(0,0,0,0.85) !important;
}

/* =============================================================================
   5. LOAD MORE / INFINITE SCROLL
   ============================================================================= */
.gallery-load-more {
  text-align: center;
  padding: var(--space-12) 0 var(--space-6);
}

.gallery-end-message {
  text-align: center;
  padding: var(--space-12) 0;
}

.gallery-end-message p {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

.gallery-end-message p::before,
.gallery-end-message p::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--color-border);
}

/* Loading state */
.gallery-loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-12);
}

/* =============================================================================
   6. SINGLE PHOTO PAGE
   ============================================================================= */
.photo-single {
  padding-top: calc(var(--nav-height) + var(--space-8));
}

.photo-single__hero {
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  position: relative;
  background: #0a0a0a;
}

.photo-single__img {
  width: 100%;
  max-height: 90vh;
  object-fit: contain;
  display: block;
}

.photo-single__body {
  max-width: 900px;
  margin: var(--space-12) auto;
  padding-inline: var(--space-6);
}

.photo-single__title {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  margin-bottom: var(--space-4);
}

.photo-single__caption {
  font-size: var(--text-md);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

/* EXIF Data */
.exif-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-4) var(--space-6);
  margin-bottom: var(--space-8);
}

.exif-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.exif-item__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.exif-item__value {
  font-size: var(--text-sm);
  color: var(--color-text);
}

/* Navigation between photos */
.photo-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.photo-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  text-decoration: none;
  transition: all var(--duration-base);
}

.photo-nav__link:hover {
  border-color: var(--color-text);
}

.photo-nav__link--next {
  flex-direction: row-reverse;
  text-align: right;
}

.photo-nav__thumb {
  width: 56px;
  height: 56px;
  object-fit: cover;
  flex-shrink: 0;
}

.photo-nav__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-1);
}

.photo-nav__title {
  font-size: var(--text-sm);
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* =============================================================================
   7. CATEGORY PILLS (for filter)
   ============================================================================= */
.category-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 0.25em 0.75em;
  background: var(--color-bg-muted);
  color: var(--color-text-secondary);
  transition: all var(--duration-base);
}

.category-badge:hover {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

/* =============================================================================
   8. PHOTO STRIP (Swiper)
   ============================================================================= */
.photo-strip {
  cursor: grab;
}

.photo-strip:active {
  cursor: grabbing;
}

/* =============================================================================
   9. STORY SINGLE PAGE
   ============================================================================= */
.story-single {
  padding-top: calc(var(--nav-height) + var(--space-4));
}

.story-cover {
  width: 100%;
  height: 75vh;
  min-height: 500px;
  overflow: hidden;
  position: relative;
}

.story-cover__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.story-cover__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.9) 0%,
    rgba(0,0,0,0.1) 60%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-16) var(--space-8);
}

.story-cover__title {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-2xl), 5vw, var(--text-4xl));
  color: #fff;
  font-weight: 700;
  letter-spacing: -0.02em;
  max-width: 800px;
}

.story-body {
  max-width: 820px;
  margin: var(--space-16) auto;
  padding-inline: var(--space-6);
}

.story-description {
  font-size: var(--text-md);
  line-height: 1.9;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-16);
}

/* Story images timeline */
.story-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.story-image-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}

.story-image-block:nth-child(even) {
  direction: rtl;
}

.story-image-block:nth-child(even) > * {
  direction: ltr;
}

.story-image-block--full {
  grid-template-columns: 1fr;
}

.story-image-block__img-wrap {
  overflow: hidden;
}

.story-image-block__img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  transition: transform var(--duration-slow) var(--ease-expo);
}

.story-image-block__img:hover {
  transform: scale(1.03);
}

.story-image-block__caption {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding: var(--space-6);
}

.story-image-block__caption h3 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

@media (max-width: 768px) {
  .story-image-block {
    grid-template-columns: 1fr;
    direction: ltr !important;
  }
}