/* ==========================================================================
   Studio Tools — Shared Styles for Image/Video/Audio/PDF modules
   Uses design tokens from variables.css exclusively.
   ========================================================================== */

/* --- Tool Layout --- */
.studio-tool {
  display: flex; flex-direction: column;
  height: 100%; overflow-y: auto;
  padding: 0; gap: 0;
}

.studio-tool-header {
  display: flex; align-items: center; gap: 12px;
  padding: 20px 24px 12px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.studio-tool-icon {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-lg, 12px);
  font-size: 1.25rem;
}

.studio-tool-title {
  font-family: var(--font-display);
  font-size: var(--text-xl, 1.25rem);
  font-weight: 600;
  color: var(--color-text-bright);
}

.studio-tool-body {
  flex: 1; overflow-y: auto;
  padding: 16px 24px 24px;
  display: flex; flex-direction: column; gap: 16px;
}

/* --- Prompt Area --- */
.tool-prompt-area {
  display: flex; flex-direction: column; gap: 6px;
}

.tool-prompt {
  width: 100%; min-height: 72px; max-height: 160px;
  padding: 12px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 8px);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: var(--text-sm, 0.875rem);
  line-height: 1.5;
  resize: vertical;
  transition: border-color var(--transition-fast, 150ms);
}

.tool-prompt:focus {
  outline: none;
  border-color: var(--color-accent);
}

.tool-prompt::placeholder {
  color: var(--color-text-placeholder);
}

.tool-routing-hint {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted);
  min-height: 1.2em;
}

.tool-routing-hint .hint-label {
  color: var(--color-accent);
  font-weight: 600;
}

/* --- Section Label --- */
.tool-section-label {
  font-size: var(--text-xs, 0.75rem);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

/* --- Model Grid --- */
.tool-model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
}

.tool-model-card {
  display: flex; flex-direction: column;
  align-items: flex-start; gap: 2px;
  padding: 10px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 8px);
  cursor: pointer;
  transition: all var(--transition-fast, 150ms);
  font-family: var(--font-ui);
  text-align: left;
  color: var(--color-text);
}

.tool-model-card:hover:not([disabled]) {
  border-color: var(--color-border-strong);
  background: var(--color-bg-tertiary);
}

.tool-model-card.selected {
  border-color: var(--color-accent);
  background: var(--color-accent-muted);
}

.tool-model-card.unavailable {
  opacity: 0.45;
  cursor: not-allowed;
}

.tool-mmc-icon { font-size: 1.1rem; }
.tool-mmc-name {
  font-size: var(--text-sm, 0.875rem);
  font-weight: 500;
  color: var(--color-text-bright);
  line-height: 1.3;
}

.tool-mmc-badges {
  display: flex; gap: 4px; font-size: 0.75rem;
}

.tool-mmc-desc {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted);
}

.tool-mmc-section-label {
  grid-column: 1 / -1;
  font-size: var(--text-xs, 0.75rem);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 8px 0 2px;
  border-top: 1px solid var(--color-border);
}

.tool-mmc-section-label:first-child { border-top: none; padding-top: 0; }

.tool-avail-badge {
  font-size: 0.65rem;
  padding: 1px 6px;
  border-radius: var(--radius-sm, 4px);
  background: var(--color-bg-tertiary);
  color: var(--color-text-muted);
}

.tool-avail-badge.free { background: rgba(59,185,80,0.15); color: var(--color-success); }
.tool-avail-badge.free-key { background: rgba(0,196,167,0.12); color: var(--color-accent); }
.tool-avail-badge.credits { background: rgba(210,153,34,0.15); color: var(--color-warning); }
.tool-avail-badge.paid { background: rgba(250,204,21,0.12); color: #facc15; }
.tool-key-needed { font-size: 0.65rem; color: var(--color-text-muted); opacity: 0.6; }

.tool-notice {
  grid-column: 1 / -1;
  padding: 10px 14px;
  background: rgba(210,153,34,0.1);
  border: 1px solid rgba(210,153,34,0.2);
  border-radius: var(--radius-md, 8px);
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-warning);
  line-height: 1.4;
}

.tool-notice code {
  font-family: var(--font-mono);
  background: rgba(255,255,255,0.06);
  padding: 1px 5px;
  border-radius: 3px;
}

.tool-loading {
  padding: 16px;
  color: var(--color-text-muted);
  font-size: var(--text-sm, 0.875rem);
  text-align: center;
}

.tool-loading.tool-error { color: var(--color-error); }

/* --- Option Rows --- */
.tool-options {
  display: flex; flex-direction: column; gap: 8px;
}

.tool-option-row {
  display: flex; align-items: center; gap: 12px;
}

.tool-opt-label {
  font-size: var(--text-sm, 0.875rem);
  color: var(--color-text-muted);
  min-width: 80px; flex-shrink: 0;
}

.tool-opt-select {
  flex: 1; max-width: 240px;
  padding: 6px 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 8px);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: var(--text-sm, 0.875rem);
  cursor: pointer;
}

.tool-opt-select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.tool-opt-hint {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted);
  opacity: 0.6;
}

/* --- Generate Button --- */
.tool-generate-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 12px 20px;
  background: var(--color-accent);
  color: var(--color-base);
  border: none;
  border-radius: var(--radius-md, 8px);
  font-family: var(--font-ui);
  font-size: var(--text-sm, 0.875rem);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast, 150ms);
  flex-shrink: 0;
}

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

.tool-generate-btn:disabled {
  opacity: 0.5; cursor: not-allowed; transform: none;
}

/* --- Progress --- */
.tool-progress {
  display: flex; flex-direction: column; gap: 6px;
}

.tool-progress-bar {
  height: 4px;
  background: var(--color-surface);
  border-radius: 2px;
  overflow: hidden;
}

.tool-progress-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 2px;
  width: 0;
  transition: width 0.3s ease;
}

.tool-progress-msg {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted);
}

/* --- Result --- */
.tool-result {
  display: flex; flex-direction: column; gap: 8px;
}

.tool-result-header {
  display: flex; align-items: center; justify-content: space-between;
}

.tool-result-model {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.tool-result-dl-btn {
  padding: 4px 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm, 4px);
  color: var(--color-text);
  font-size: var(--text-xs, 0.75rem);
  cursor: pointer;
  transition: all var(--transition-fast, 150ms);
}

.tool-result-dl-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.tool-result-media {
  width: 100%; max-height: 480px;
  object-fit: contain;
  border-radius: var(--radius-md, 8px);
  background: var(--color-base);
}

.tool-result-prompt {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted);
  font-style: italic;
  line-height: 1.4;
}

/* --- Audio Player --- */
.tool-audio-player {
  display: flex; flex-direction: column; gap: 8px;
  padding: 16px;
  background: var(--color-surface);
  border-radius: var(--radius-md, 8px);
}

.tool-result-audio {
  width: 100%; height: 40px;
}

.tool-audio-meta {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted);
}

/* --- Refine --- */
.tool-refine-section {
  display: flex; gap: 8px; align-items: flex-end;
}

.tool-refine-input {
  flex: 1; min-height: 40px;
  padding: 8px 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 8px);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: var(--text-sm, 0.875rem);
  resize: vertical;
}

.tool-refine-input:focus { outline: none; border-color: var(--color-accent); }

.tool-refine-btn {
  padding: 8px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 8px);
  color: var(--color-text);
  font-size: var(--text-sm, 0.875rem);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast, 150ms);
}

.tool-refine-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --- Reference Image Upload --- */
.tool-ref-section { display: flex; flex-direction: column; gap: 4px; }

.tool-ref-drop {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md, 8px);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast, 150ms);
}

.tool-ref-drop:hover,
.tool-ref-drop.drag-over {
  border-color: var(--color-accent);
  background: var(--color-accent-muted);
}

.tool-ref-drop.has-image { border-style: solid; }

.tool-ref-placeholder {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--color-text-muted);
  font-size: var(--text-sm, 0.875rem);
}

.tool-ref-icon { font-size: 1.5rem; }

.tool-ref-preview {
  position: relative;
  display: inline-block;
}

.tool-ref-thumb {
  max-width: 200px; max-height: 140px;
  border-radius: var(--radius-sm, 4px);
  object-fit: contain;
}

.tool-ref-remove {
  position: absolute; top: 4px; right: 4px;
  width: 22px; height: 22px;
  background: var(--color-base);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text);
  font-size: 0.7rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}

.tool-ref-remove:hover { background: var(--color-error); color: #fff; }

/* --- History Grid --- */
.tool-history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 6px;
}

.tool-hist-item {
  aspect-ratio: 1;
  border-radius: var(--radius-sm, 4px);
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-fast, 150ms);
}

.tool-hist-item:hover { border-color: var(--color-accent); }

.tool-hist-thumb {
  width: 100%; height: 100%;
  object-fit: cover;
}

.tool-hist-audio {
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface);
}

.tool-hist-audio-icon { font-size: 1.5rem; }

/* ==========================================================================
   PDF Tool Styles
   ========================================================================== */

/* --- Document List --- */
.pdf-doc-list {
  display: flex; flex-direction: column;
  gap: 8px;
}

.pdf-doc-card {
  background: var(--color-surface, #161b22);
  border: 1px solid var(--color-border, #30363d);
  border-radius: var(--radius-md, 8px);
  padding: 12px 16px;
  transition: border-color var(--transition-fast, 150ms);
}

.pdf-doc-card:hover {
  border-color: var(--color-border-strong, #484f58);
}

.pdf-doc-title {
  font-weight: 500;
  color: var(--color-text-bright, #e6edf3);
  display: flex; align-items: center; gap: 6px;
}

.pdf-doc-meta {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted, #8b949e);
  margin-top: 2px;
}

.pdf-doc-actions {
  display: flex; flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

/* --- Q&A Bar --- */
.pdf-qa-bar {
  display: flex; align-items: center;
  gap: 8px;
  margin-top: 8px;
}

/* --- Podcast Config --- */
.pdf-podcast-config {
  display: flex; flex-direction: column;
  gap: 12px;
  padding: 16px;
  background: var(--color-surface, #161b22);
  border: 1px solid var(--color-border, #30363d);
  border-radius: var(--radius-md, 8px);
}

.pdf-speaker-row {
  display: flex; align-items: center; gap: 8px;
}

.pdf-len-btn {
  flex: 1;
  padding: 8px 12px;
  background: var(--color-surface, #161b22);
  border: 1px solid var(--color-border, #30363d);
  border-radius: var(--radius-md, 8px);
  color: var(--color-text, #c9d1d9);
  font-family: var(--font-ui);
  font-size: var(--text-sm, 0.875rem);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast, 150ms);
}

.pdf-len-btn:hover {
  border-color: var(--color-border-strong, #484f58);
}

.pdf-len-btn.active {
  border-color: var(--color-accent);
  background: var(--color-accent-muted, rgba(0,196,167,0.08));
  color: var(--color-accent);
}

/* --- Podcast Transcript --- */
.pdf-transcript {
  max-height: 400px;
  overflow-y: auto;
  padding: 16px;
  background: var(--color-surface, #161b22);
  border: 1px solid var(--color-border, #30363d);
  border-radius: var(--radius-md, 8px);
}

.pdf-turn {
  display: flex; gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border, #30363d);
  transition: background var(--transition-fast, 150ms);
}

.pdf-turn:last-child { border-bottom: none; }

/* --- Result Text (Markdown) --- */
.pdf-result-text {
  line-height: 1.6;
  color: var(--color-text, #c9d1d9);
  padding: 12px 0;
}

.pdf-result-text h1,
.pdf-result-text h2,
.pdf-result-text h3 {
  color: var(--color-text-bright, #e6edf3);
  margin: 16px 0 8px;
}

.pdf-result-text h1 { font-size: 1.25rem; }
.pdf-result-text h2 { font-size: 1.1rem; }
.pdf-result-text h3 { font-size: 1rem; }

.pdf-result-text p { margin: 8px 0; }

.pdf-result-text code {
  font-family: var(--font-mono);
  background: var(--color-bg-tertiary, rgba(255,255,255,0.06));
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.85em;
}

.pdf-result-text pre {
  background: var(--color-base, #0d1117);
  border: 1px solid var(--color-border, #30363d);
  border-radius: var(--radius-md, 8px);
  padding: 12px 16px;
  overflow-x: auto;
  margin: 12px 0;
}

.pdf-result-text pre code {
  background: none;
  padding: 0;
}

.pdf-result-text ul,
.pdf-result-text ol {
  padding-left: 20px;
  margin: 8px 0;
}

.pdf-result-text li { margin: 4px 0; }

.pdf-result-text blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 12px;
  margin: 12px 0;
  color: var(--color-text-muted, #8b949e);
}

/* --- Result Area --- */
.pdf-result-area {
  margin-top: 8px;
}

/* ==========================================================================
   Gallery Tool Styles
   ========================================================================== */

/* --- Stats Bar --- */
.gallery-stats {
  display: flex; flex-wrap: wrap;
  gap: 8px;
  padding: 8px 0;
}

/* --- Filter Bar --- */
.gallery-filter-bar {
  display: flex; gap: 6px;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border, #30363d);
}

.gallery-filter-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 12px;
  border-radius: 16px;
  background: var(--color-surface, #21262d);
  color: var(--color-text-muted, #8b949e);
  border: 1px solid var(--color-border, #30363d);
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 13px;
  transition: all var(--transition-fast, 150ms);
}

.gallery-filter-btn:hover { border-color: #58a6ff; }

.gallery-filter-btn.active {
  background: #1f6feb;
  color: #fff;
  border-color: #1f6feb;
}

/* --- Gallery Grid --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  padding: 12px 0;
}

/* --- Gallery Card --- */
.gallery-card {
  background: var(--color-surface, #161b22);
  border: 1px solid var(--color-border, #30363d);
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  transition: border-color var(--transition-fast, 150ms);
}

.gallery-card:hover { border-color: #58a6ff; }

.gallery-card-thumb {
  width: 100%;
  aspect-ratio: 1;
  background: var(--color-base, #0d1117);
  cursor: pointer;
  overflow: hidden;
  color: var(--color-text-muted, #8b949e);
}

.gallery-card-thumb img,
.gallery-card-thumb video {
  width: 100%; height: 100%;
  object-fit: cover;
}

.gallery-card-body { padding: 8px 12px; }

.gallery-card-name {
  font-size: 13px;
  color: var(--color-text-bright, #e6edf3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gallery-card-meta {
  font-size: 11px;
  color: var(--color-text-muted, #8b949e);
  margin-top: 2px;
  display: flex; align-items: center; gap: 4px;
}

.gallery-card-actions {
  display: flex; gap: 4px;
  padding: 4px 12px 8px;
  justify-content: flex-end;
}

.gallery-card-actions button {
  background: transparent;
  border: 1px solid var(--color-border, #30363d);
  border-radius: var(--radius-sm, 4px);
  color: var(--color-text-muted, #8b949e);
  cursor: pointer;
  padding: 4px 6px;
  display: flex; align-items: center;
  transition: all var(--transition-fast, 150ms);
}

.gallery-card-actions button:hover {
  border-color: #58a6ff;
  color: #58a6ff;
}

/* --- Empty State --- */
.gallery-empty {
  text-align: center;
  padding: 48px 16px;
  color: var(--color-text-muted, #8b949e);
}

/* --- Lightbox --- */
.gallery-lightbox {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}

.gallery-lightbox-toolbar {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px;
  background: rgba(0,0,0,0.5);
}

.gallery-lightbox-toolbar button {
  background: transparent;
  border: none;
  color: var(--color-text-bright, #e6edf3);
  cursor: pointer;
  padding: 6px;
  display: flex; align-items: center;
}

.gallery-lightbox-toolbar button:hover { color: #58a6ff; }

.gallery-lightbox-content {
  display: flex; align-items: center; justify-content: center;
  max-width: 90vw; max-height: 85vh;
}

.gallery-lightbox img {
  max-width: 90vw; max-height: 85vh;
  object-fit: contain;
}

.gallery-lightbox video,
.gallery-lightbox audio {
  max-width: 90vw; max-height: 85vh;
}

/* --- Delete Confirmation States --- */
.delete-confirm-1 {
  background: #d29922 !important;
  color: #000 !important;
  border-color: #d29922 !important;
}

.delete-confirm-2 {
  background: #f85149 !important;
  color: #fff !important;
  border-color: #f85149 !important;
}

/* ==========================================================================
   Content Builder Tool Styles
   ========================================================================== */

/* --- Drop Zone --- */
.content-drop-zone {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg, 12px);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast, 150ms);
}

.content-drop-zone:hover {
  border-color: var(--color-primary, var(--color-accent));
}

.content-drop-zone.drag-active {
  border-color: var(--color-accent);
  background: var(--color-bg-tertiary, rgba(255,255,255,0.04));
}

/* --- Source Card --- */
.content-source-card {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: var(--color-surface, #161b22);
  border: 1px solid var(--color-border, #30363d);
  border-radius: var(--radius-md, 8px);
  margin-bottom: 6px;
  transition: border-color var(--transition-fast, 150ms);
}

.content-source-card:hover {
  border-color: var(--color-border-strong, #484f58);
}

.content-source-info {
  display: flex; flex-direction: column; gap: 2px;
  min-width: 0; flex: 1;
}

.content-source-name {
  font-size: var(--text-sm, 0.875rem);
  font-weight: 500;
  color: var(--color-text-bright, #e6edf3);
  display: flex; align-items: center; gap: 6px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.content-source-meta {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text-muted, #8b949e);
}

.content-source-actions {
  display: flex; align-items: center; gap: 8px;
  flex-shrink: 0;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .studio-tool-body { padding: 12px 16px 16px; }
  .tool-model-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .tool-history-grid { grid-template-columns: repeat(auto-fill, minmax(60px, 1fr)); }
  .pdf-doc-actions { gap: 4px; }
  .pdf-transcript { max-height: 300px; }
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}