/* Gallery - Family Photo Archive
   Uses design tokens from ../styles/design-tokens.css */

/* ================================================================
   RESET & BASE
   ================================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: var(--leading-normal);
  min-height: 100vh;
}

/* ================================================================
   GALLERY HEADER
   ================================================================ */
.gallery-header {
  position: sticky;
  top: 0;
  z-index: var(--z-overlay);
  background: var(--color-surface-overlay);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6);
}

.header-top {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.home-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--duration-normal) var(--ease-out);
}
.home-link:hover { color: var(--color-accent); }

.gallery-title {
  flex: 1;
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-2);
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  transition: all var(--duration-normal) var(--ease-out);
  line-height: 1;
}
.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
/* Show/hide icons based on theme */
.theme-icon-dark { display: none; }
@media (prefers-color-scheme: dark) {
  .theme-icon-light { display: none; }
  .theme-icon-dark { display: inline; }
}
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: inline; }
[data-theme="light"] .theme-icon-light { display: inline; }
[data-theme="light"] .theme-icon-dark { display: none; }

/* Search */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.search-input-wrap {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: var(--space-3);
  color: var(--color-text-muted);
  pointer-events: none;
}

#search-input {
  width: 100%;
  padding: var(--space-2) var(--space-10) var(--space-2) var(--space-10);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  transition: border-color var(--duration-normal) var(--ease-out);
}
#search-input::placeholder { color: var(--color-text-faint); }
#search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.search-clear {
  position: absolute;
  right: var(--space-2);
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-lg);
  padding: var(--space-1);
  display: none;
  line-height: 1;
}
.search-clear.visible { display: block; }
.search-clear:hover { color: var(--color-text); }

.result-count {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
  align-self: center;
  line-height: 1;
}

/* Filters */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.era-filters {
  display: flex;
  gap: var(--space-1);
}

.era-btn {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  font-family: var(--font-sans);
}
.era-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.era-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text-inverse);
  font-weight: var(--weight-medium);
}

.dropdown-filters {
  display: flex;
  gap: var(--space-2);
}

.dropdown-filters select {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  font-family: var(--font-sans);
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2378716c' d='M3 4.5l3 3 3-3'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: var(--space-6);
}
.dropdown-filters select:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* Active filter chips */
.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}
.active-filters:empty { margin-top: 0; }

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--color-accent-subtle);
  color: var(--color-accent-text);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
}

.filter-chip button {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: var(--text-sm);
  line-height: 1;
  padding: 0 2px;
  opacity: 0.6;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
}
.filter-chip button:hover {
  opacity: 1;
  background: rgba(0,0,0,0.1);
}

/* ================================================================
   MASONRY GRID
   ================================================================ */
.masonry {
  column-count: 5;
  column-gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
}

@media (max-width: 1400px) { .masonry { column-count: 4; } }
@media (max-width: 1100px) { .masonry { column-count: 3; } }
@media (max-width: 800px)  { .masonry { column-count: 2; padding: var(--space-3); } }
@media (max-width: 500px)  { .masonry { column-count: 1; } }

/* Photo card */
.photo-card {
  break-inside: avoid;
  margin-bottom: var(--space-3);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}
.photo-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.photo-card img {
  display: block;
  width: 100%;
  height: auto;
}

.photo-card .card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-3);
}
.photo-card:hover .card-overlay,
.photo-card:focus-within .card-overlay { opacity: 1; }

.card-era {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}

.card-desc {
  color: #fff;
  font-size: var(--text-sm);
  line-height: var(--leading-tight);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: var(--space-1);
}

.card-icons {
  display: flex;
  gap: var(--space-2);
  color: rgba(255,255,255,0.8);
  font-size: var(--text-xs);
}

/* Fade-in animation */
.photo-card {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp var(--duration-slow) var(--ease-out) forwards;
}
@media (prefers-reduced-motion: reduce) {
  .photo-card { opacity: 1; transform: none; animation: none; }
}
@keyframes fadeInUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-6);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

.btn-secondary {
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
}
.btn-secondary:hover { border-color: var(--color-accent); }

/* ================================================================
   DETAIL VIEW
   ================================================================ */
#detail-view { min-height: 100vh; }

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.btn-back, .btn-nav {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-1) var(--space-3);
  color: var(--color-text-secondary);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  transition: all var(--duration-normal) var(--ease-out);
}
.btn-back:hover, .btn-nav:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.detail-nav { display: flex; gap: var(--space-2); }

.detail-content {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-6);
  padding: var(--space-6);
  max-width: 1600px;
  margin: 0 auto;
}

@media (max-width: 1100px) {
  .detail-content { grid-template-columns: 1fr 300px; gap: var(--space-4); padding: var(--space-4); }
}
@media (max-width: 800px) {
  .detail-content { grid-template-columns: 1fr; padding: var(--space-3); }
}

/* Photo area */
.detail-photo-area { min-width: 0; }

.photo-container {
  position: relative;
  background: var(--color-surface-sunken);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.photo-container.compare-active {
  cursor: col-resize;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

.photo-container > #detail-img {
  max-width: 100%;
  max-height: 75vh;
  display: block;
  object-fit: contain;
}

/* Compare overlay — sits on top of the main image */
.compare-overlay { position: absolute; inset: 0; }
.compare-overlay img { pointer-events: none; -webkit-user-drag: none; }
.compare-before-img { display: block; width: 100%; height: 100%; object-fit: contain; }
.compare-after-clip { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.compare-after-img { display: block; width: 100%; height: 100%; object-fit: contain; }

/* Layer bar: switcher + compare controls */
.layer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  flex-wrap: wrap;
}

.layer-switcher {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
}

.layer-btn {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--duration-normal) var(--ease-out);
}
.layer-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.layer-btn.active {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  color: var(--color-accent-text);
  font-weight: var(--weight-medium);
}

/* Compare controls */
.compare-controls { display: flex; align-items: center; gap: var(--space-2); }

.compare-toggle {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--duration-normal) var(--ease-out);
}
.compare-toggle:hover { border-color: var(--color-interactive); color: var(--color-interactive); }
.compare-toggle[aria-pressed="true"] {
  background: var(--color-interactive-subtle);
  border-color: var(--color-interactive);
  color: var(--color-interactive);
  font-weight: var(--weight-medium);
}

.compare-controls select {
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
}

.compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2;
  pointer-events: none;
}

.compare-line {
  flex: 1;
  width: 2px;
  background: #fff;
  box-shadow: 0 0 4px rgba(0,0,0,0.5);
}

.compare-grip {
  width: 36px;
  height: 36px;
  background: #fff;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #333;
  font-size: 14px;
  flex-shrink: 0;
}

/* Comparison labels */
.compare-label {
  position: absolute;
  top: var(--space-2);
  padding: 2px var(--space-2);
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-sm);
  pointer-events: none;
  backdrop-filter: blur(4px);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  z-index: 3;
}
.compare-label-before { left: var(--space-2); }
.compare-label-after { right: var(--space-2); }

/* ================================================================
   METADATA PANEL
   ================================================================ */
.metadata-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.meta-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.meta-section h3 {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-3);
}

/* Overview grid */
.meta-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
}
.meta-grid dt { color: var(--color-text-muted); }
.meta-grid dd { color: var(--color-text); font-weight: var(--weight-medium); }

/* Description */
.meta-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* Tags */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
  border: 1px solid transparent;
}

/* Confidence coloring: solid = all models agree ≥0.75, outline = low confidence */
.tag-chip.high-confidence {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}
.tag-chip.med-confidence {
  background: var(--color-accent-subtle);
  color: var(--color-accent-text);
  border-color: var(--color-accent-subtle);
}
.tag-chip.low-confidence {
  background: transparent;
  border-color: var(--color-text-faint);
  color: var(--color-text-muted);
}
.tag-chip:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
  filter: brightness(1.1);
}

/* Collapsible sections */
.collapsible .section-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  padding: 0;
}
.collapsible .section-toggle h3 { margin-bottom: 0; }

.toggle-arrow {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  transition: transform var(--duration-normal) var(--ease-out);
}
.collapsible.open .toggle-arrow { transform: rotate(90deg); }

.collapsible .section-body {
  display: none;
  margin-top: var(--space-3);
}
.collapsible.open .section-body { display: block; }

/* Quality judge */
.judge-winner {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--color-success-subtle);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-success);
}

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

.vote-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border-subtle);
}
.vote-row:last-of-type { border-bottom: none; }

.vote-model {
  color: var(--color-text-secondary);
  min-width: 70px;
  font-weight: var(--weight-medium);
}

.vote-choice { color: var(--color-text); font-weight: var(--weight-medium); }
.vote-check { color: var(--color-success); }
.vote-cross { color: var(--color-text-muted); }

.reasoning-toggle {
  background: var(--color-interactive-subtle);
  border: 1px solid var(--color-interactive);
  border-radius: var(--radius-sm);
  color: var(--color-interactive);
  cursor: pointer;
  font-size: var(--text-xs);
  padding: 1px var(--space-2);
  margin-left: auto;
  transition: all var(--duration-fast) var(--ease-out);
  font-family: var(--font-sans);
  white-space: nowrap;
}
.reasoning-toggle:hover {
  background: var(--color-interactive);
  color: var(--color-text-inverse);
}

.reasoning-text {
  display: none;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  padding: var(--space-2) 0 var(--space-2) calc(70px + var(--space-2));
  border-bottom: 1px solid var(--color-border-subtle);
}
.reasoning-text.visible { display: block; }

/* Committee */
.agreement-bar {
  height: 6px;
  background: var(--color-surface-sunken);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-3);
}
.agreement-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--duration-slow) var(--ease-out);
}

/* Committee details */
.agreement-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.committee-model-list {
  font-size: var(--text-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.committee-model-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  background: var(--color-surface-sunken);
}

.committee-model-row strong {
  color: var(--color-text);
  font-weight: var(--weight-medium);
}

.committee-tag-count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: var(--color-surface);
  padding: 1px var(--space-2);
  border-radius: var(--radius-full);
}

/* Downloads */
.download-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: all var(--duration-normal) var(--ease-out);
  line-height: 1;
}
.download-btn svg {
  flex-shrink: 0;
  vertical-align: middle;
}
.download-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-subtle);
}

/* ================================================================
   UTILITIES
   ================================================================ */
[hidden] { display: none !important; }

/* Focus visible for keyboard nav */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Scrollbar styling */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }