/* ==========================================================================
   Prompt Gallery — Modern Dark Minimalist UI (Bento Poster Design)
   Inspired by Dark Mode Design
   ========================================================================== */

:root {
  --bg-main: #09090b;
  --bg-surface: #121215;
  --bg-surface-elevated: #18181b;
  --bg-surface-hover: #202024;
  --border-subtle: #27272a;
  --border-active: #3f3f46;
  --border-focus: #52525b;

  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --text-dim: #52525b;

  --accent-primary: #ffffff;
  --accent-primary-text: #09090b;
  --accent-hover: #e4e4e7;
  --accent-subtle: rgba(255, 255, 255, 0.08);

  --status-success: #10b981;
  --status-warning: #f59e0b;
  --status-danger: #ef4444;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  min-height: 100%;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
}

/* Layout */
.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Header Navigation
   ========================================================================== */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  cursor: pointer;
}

.brand-icon {
  font-size: 1.25rem;
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-tag {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

/* Nav Tabs */
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  background-color: var(--bg-surface);
  padding: 4px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-tab:hover {
  color: var(--text-primary);
}

.nav-tab.active {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  background-color: var(--border-subtle);
  color: var(--text-primary);
  padding: 1px 6px;
  border-radius: 10px;
}

.nav-tab.active .badge {
  background-color: var(--text-primary);
  color: var(--bg-main);
}

/* Header Status */
.header-status {
  display: flex;
  align-items: center;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  padding: 5px 12px;
  border-radius: 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

.status-indicator .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--status-success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

/* ==========================================================================
   Main Content & Panels
   ========================================================================== */
.main-content {
  flex: 1;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
}

/* Common Card Styles */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color var(--transition-fast);
}

.card:hover {
  border-color: var(--border-active);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.card-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.card-hint {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Studio View Layout
   ========================================================================== */
.studio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 1024px) {
  .studio-grid {
    grid-template-columns: 1fr;
  }
}

.studio-input-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Dropzone */
.dropzone {
  position: relative;
  min-height: 140px;
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  background-color: rgba(24, 24, 27, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-smooth);
  overflow: hidden;
  padding: 16px;
}

.dropzone:hover, .dropzone.drag-over {
  border-color: var(--text-secondary);
  background-color: rgba(24, 24, 27, 0.8);
}

.dropzone:focus-visible {
  outline: none;
  border-color: var(--border-focus);
}

.file-input-hidden {
  display: none;
}

.dropzone-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}

.drop-icon {
  color: var(--text-muted);
  transition: transform var(--transition-smooth);
}

.dropzone:hover .drop-icon {
  transform: translateY(-2px);
  color: var(--text-primary);
}

.drop-prompt {
  font-size: 0.88rem;
  color: var(--text-primary);
  font-weight: 500;
}

.drop-prompt kbd {
  display: inline-block;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

.drop-sub {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.dropzone-preview {
  position: relative;
  width: 100%;
  max-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #000;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.dropzone-preview img {
  max-width: 100%;
  max-height: 220px;
  object-fit: contain;
}

.btn-icon-clear {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon-clear:hover {
  background-color: var(--status-danger);
  border-color: var(--status-danger);
}

/* Multimodal Action Pills */
.multimodal-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 12px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-action:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-active);
}

.btn-action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.multimodal-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Prompt Editor */
.prompt-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.76rem;
  color: var(--text-muted);
}

.btn-text-action {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.76rem;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.btn-text-action:hover {
  color: var(--text-primary);
}

.prompt-input-wrapper textarea {
  width: 100%;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  line-height: 1.6;
  resize: vertical;
  min-height: 220px;
  transition: border-color var(--transition-fast);
}

.prompt-input-wrapper textarea:focus {
  outline: none;
  border-color: var(--border-focus);
}

.prompt-input-wrapper textarea::placeholder {
  color: var(--text-dim);
}

/* Quick Modifier Tags */
.tag-presets {
  margin-top: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.tag-label {
  font-size: 0.74rem;
  color: var(--text-muted);
  padding-top: 3px;
  white-space: nowrap;
}

.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-chip {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 0.72rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tag-chip:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--border-active);
}

/* Primary Generate Button */
.btn-generate {
  margin-top: 18px;
  width: 100%;
  padding: 13px 20px;
  background-color: var(--accent-primary);
  color: var(--accent-primary-text);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.94rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-generate:hover:not(:disabled) {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-generate:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-generate-content, .btn-generate-loading {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

/* ==========================================================================
   Studio Viewport (Right Column)
   ========================================================================== */
.studio-output-column .viewport-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.viewport-display {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: #050505;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.viewport-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 10px;
  padding: 40px 20px;
  color: var(--text-muted);
}

.placeholder-art {
  color: var(--text-dim);
  margin-bottom: 8px;
}

.viewport-placeholder h3 {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.viewport-placeholder p {
  font-size: 0.82rem;
  max-width: 280px;
  line-height: 1.5;
}

/* Viewport Loading State */
.viewport-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
}

.pulse-ring {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-top-color: #fff;
  animation: spin 0.9s linear infinite;
}

.loading-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}

.loading-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Viewport Active Result */
.viewport-result {
  position: relative;
  width: 100%;
  height: 100%;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #000;
}

.viewport-result img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.viewport-image-overlay {
  position: absolute;
  top: 14px;
  right: 14px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.viewport-result:hover .viewport-image-overlay {
  opacity: 1;
}

.btn-overlay-zoom {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background-color: rgba(0, 0, 0, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
}

.btn-overlay-zoom:hover {
  background-color: rgba(0, 0, 0, 0.95);
  border-color: rgba(255, 255, 255, 0.5);
  transform: scale(1.02);
}

/* Viewport Decision Actions */
.viewport-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
}

.decision-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-save-gallery {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background-color: var(--accent-primary);
  color: var(--accent-primary-text);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-save-gallery:hover:not(:disabled) {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-save-gallery.saved {
  background-color: var(--status-success);
  color: #fff;
}

.btn-save-gallery:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-active);
}

.btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-discard {
  color: var(--text-muted);
}

.btn-discard:hover:not(:disabled) {
  color: var(--status-danger);
  border-color: rgba(239, 68, 68, 0.3);
}

/* ==========================================================================
   Gallery View (Uniform Fixed-Size Poster Presentation)
   ========================================================================== */
.gallery-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.gallery-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px 20px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.toolbar-search {
  position: relative;
  flex: 1;
  max-width: 440px;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  pointer-events: none;
}

.toolbar-search input {
  width: 100%;
  padding: 9px 36px 9px 40px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.86rem;
  transition: border-color var(--transition-fast);
}

.toolbar-search input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.search-clear {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 4px;
}

.search-clear:hover {
  color: var(--text-primary);
}

.toolbar-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.sort-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.sort-selector select {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 6px 10px;
  font-size: 0.82rem;
  cursor: pointer;
}

.sort-selector select:focus {
  outline: none;
  border-color: var(--border-focus);
}

.btn-refresh {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-refresh:hover {
  color: var(--text-primary);
  border-color: var(--border-active);
}

/* Uniform Fixed-Size 4-Column Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 1200px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 860px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

/* Fixed-Size Gallery Card */
.gallery-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.gallery-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-active);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.5);
}

/* Fixed-Size Photo Frame Viewport (3:4 Ratio Matching Reference) */
.poster-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  background-color: #000;
  overflow: hidden;
  cursor: pointer;
}

.poster-viewport img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1);
  display: block;
}

.gallery-card:hover .poster-viewport img {
  transform: scale(1.03);
}

/* Hover Action Bar */
.poster-overlay-actions {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  gap: 6px;
  opacity: 0;
  transform: translateY(-4px);
  transition: all var(--transition-smooth);
}

.gallery-card:hover .poster-overlay-actions {
  opacity: 1;
  transform: translateY(0);
}

.btn-card-action {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: all var(--transition-fast);
}

.btn-card-action:hover {
  background-color: #fff;
  color: #000;
  border-color: #fff;
  transform: scale(1.08);
}

.btn-card-action.btn-del:hover {
  background-color: var(--status-danger);
  color: #fff;
  border-color: var(--status-danger);
}

/* Poster Footer */
.poster-info {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: var(--bg-surface);
}

.poster-prompt {
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  min-height: 2.3em;
}

.poster-prompt:hover {
  color: var(--accent-hover);
}

.poster-bottom-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.poster-tags {
  display: flex;
  align-items: center;
  gap: 6px;
}

.pill-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--text-secondary);
}

.poster-date {
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* Empty State */
.gallery-empty {
  padding: 80px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.empty-icon {
  font-size: 2.8rem;
  margin-bottom: 4px;
}

.gallery-empty h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.gallery-empty p {
  font-size: 0.88rem;
  color: var(--text-muted);
  max-width: 380px;
}

.gallery-empty .btn-primary {
  margin-top: 10px;
  padding: 10px 22px;
  background-color: var(--accent-primary);
  color: var(--accent-primary-text);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-empty .btn-primary:hover {
  background-color: var(--accent-hover);
}

/* Clickable Numbered Pagination Bar */
.gallery-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  padding-bottom: 24px;
}

.btn-page-nav {
  padding: 8px 14px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-page-nav:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-active);
}

.btn-page-nav:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.pagination-numbers {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-page-number {
  min-width: 34px;
  height: 34px;
  padding: 0 6px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-page-number:hover {
  color: var(--text-primary);
  border-color: var(--border-active);
  background-color: var(--bg-surface-hover);
}

.btn-page-number.active {
  background-color: var(--accent-primary);
  color: var(--accent-primary-text);
  border-color: var(--accent-primary);
  font-weight: 700;
}

.pagination-ellipsis {
  color: var(--text-dim);
  font-family: var(--font-mono);
  padding: 0 4px;
}

/* ==========================================================================
   Interactive Fullscreen Lightbox Modal
   ========================================================================== */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(5, 5, 7, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.lightbox-content {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 10;
}

/* Topbar */
.lightbox-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  z-index: 30;
  background: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent);
}

.lightbox-counter {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.lightbox-zoom-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(24, 24, 27, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 4px 8px;
  border-radius: 20px;
  backdrop-filter: blur(8px);
}

.btn-lb-control {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  transition: all var(--transition-fast);
}

.btn-lb-control:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.1);
}

.zoom-level-badge {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-primary);
  min-width: 44px;
  text-align: center;
}

.btn-lb-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(24, 24, 27, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-lb-close:hover {
  background-color: rgba(255, 255, 255, 0.15);
  transform: scale(1.05);
}

/* Navigation Arrow Buttons */
.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(24, 24, 27, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 25;
  backdrop-filter: blur(8px);
  transition: all var(--transition-smooth);
}

.lightbox-nav-btn:hover {
  background-color: #fff;
  color: #000;
  border-color: #fff;
  transform: translateY(-50%) scale(1.08);
}

.lightbox-nav-btn.nav-prev { left: 24px; }
.lightbox-nav-btn.nav-next { right: 24px; }

/* Lightbox Stage (Canvas Wrapper for Zoom & Pan) */
.lightbox-stage {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  cursor: grab;
  user-select: none;
}

.lightbox-stage.panning {
  cursor: grabbing;
}

.lightbox-canvas-wrapper {
  position: relative;
  display: inline-block;
  transform-origin: center center;
  transition: transform 80ms ease-out;
  will-change: transform;
}

.lightbox-img {
  max-width: 85vw;
  max-height: 70vh;
  object-fit: contain;
  display: block;
  pointer-events: none;
}

/* Lightbox Bottom Drawer */
.lightbox-drawer {
  padding: 18px 32px 24px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.95) 40%, transparent);
  z-index: 30;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 960px;
  margin: 0 auto;
  width: 100%;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.drawer-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.meta-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-secondary);
  padding: 3px 8px;
  border-radius: 4px;
}

.drawer-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-drawer-action {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-drawer-action:hover {
  background-color: #fff;
  color: #000;
  border-color: #fff;
}

.btn-drawer-action.btn-import-studio {
  background-color: var(--accent-primary);
  color: var(--accent-primary-text);
  border-color: var(--accent-primary);
  font-weight: 600;
}

.btn-drawer-action.btn-import-studio:hover {
  background-color: var(--accent-hover);
}

.btn-drawer-delete {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--status-danger);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-drawer-delete:hover {
  background-color: var(--status-danger);
  color: #fff;
  border-color: var(--status-danger);
}

.drawer-body {
  max-height: 90px;
  overflow-y: auto;
}

.drawer-prompt {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-primary);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 260px;
  max-width: 400px;
  padding: 12px 16px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  font-size: 0.84rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 200ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.toast.toast-success { border-color: var(--status-success); }
.toast.toast-error { border-color: var(--status-danger); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(8px) scale(0.95); }
}

/* Spinners & Utilities */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0, 0, 0, 0.2);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

.spinner-sm {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hidden {
  display: none !important;
}