/**
 * Preview Tabs - CSS styles for tabbed preview pane
 *
 * Structure:
 * - .preview-header: Tab bar container
 * - .preview-tabs: Tab button group
 * - .preview-tab: Individual tab button
 * - .preview-content: Content area
 * - .preview-tab-content: Individual tab content panel
 */

/* ============================================
   Preview Header (Tab Bar)
   ============================================ */

.preview-header {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  overflow-x: auto;
  touch-action: pan-y; /* Allow vertical scroll, enable horizontal swipe */
  user-select: none;
  -webkit-user-select: none;
}

/* When preview is hidden, header becomes the tap target */
#preview-pane.preview-hidden .preview-header {
  padding: 8px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* Hide tabs when preview is hidden (just show clickable area) */
#preview-pane.preview-hidden .preview-tabs {
  display: none;
}

#preview-pane.preview-hidden .preview-header::after {
  content: '\1D11E  Tap for preview';
  font-size: 14px;
  color: var(--primary-color);
  background: var(--bg-tertiary);
  padding: 6px 16px;
  border-radius: var(--radius-full, 9999px);
  border: 1px solid var(--border-color);
  transition: background-color 0.15s, border-color 0.15s;
}

#preview-pane.preview-hidden .preview-header:hover::after {
  background: var(--bg-hover);
  border-color: var(--primary-color);
}

/* Hide clef control when preview is hidden */
#preview-pane.preview-hidden .clef-control {
  display: none;
}

/* ============================================
   Clef Control (right side of header)
   ============================================ */

.clef-control {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  position: relative;
}

.clef-control.hidden {
  display: none;
}

.clef-line-indicator {
  white-space: nowrap;
}

/* Line type indicator (status display) */
.line-type-indicator {
  display: inline-block;
  padding: 1px 5px;
  background: var(--bg-tertiary, #f0f0f0);
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: help;
}

/* Line type colors for visual differentiation */
.line-type-indicator[data-type="notation"] { background: #e3f2fd; color: #1565c0; }
.line-type-indicator[data-type="lyrics"] { background: #f3e5f5; color: #7b1fa2; }
.line-type-indicator[data-type="chords"] { background: #e8f5e9; color: #2e7d32; }
.line-type-indicator[data-type="figures"] { background: #fff3e0; color: #e65100; }
.line-type-indicator[data-type="tabla"] { background: #fce4ec; color: #c2185b; }
.line-type-indicator[data-type="timed-text"] { background: #e0f7fa; color: #00838f; }
.line-type-indicator[data-type="unknown"] { background: #fafafa; color: #757575; }

.clef-separator {
  opacity: 0.5;
}

.clef-selector {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: var(--bg-tertiary, #f0f0f0);
  border: 1px solid var(--border-color, #ddd);
  border-radius: 6px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 13px;
}

.clef-selector:hover {
  background: var(--bg-secondary, #e5e5e5);
}

.clef-arrow {
  font-size: 10px;
  opacity: 0.6;
}

/* Dropdown */
.clef-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--bg-primary, white);
  border: 1px solid var(--border-color, #ddd);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  display: none;
  z-index: 100;
  min-width: 100px;
}

.clef-dropdown.open {
  display: block;
}

.clef-option {
  display: block;
  width: 100%;
  padding: 8px 16px;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 14px;
}

.clef-option:first-child {
  border-radius: 7px 7px 0 0;
}

.clef-option:last-child {
  border-radius: 0 0 7px 7px;
}

.clef-option:hover {
  background: var(--bg-secondary, #f5f5f5);
}

.clef-option.active {
  font-weight: 600;
  color: var(--accent-color, #3b82f6);
}

/* ============================================
   Tab Buttons
   ============================================ */

.preview-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-tertiary, #f0f0f0);
  border-radius: 8px;
  padding: 3px;
  min-width: 0;
  flex-shrink: 1;
}

.preview-tab {
  padding: 6px 16px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
  min-width: 0;
  flex-shrink: 1;
}

.preview-tab:hover {
  background: var(--bg-hover);
}

.preview-tab.active {
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.preview-tab:active {
  transform: scale(0.98);
}

/* ============================================
   Tab Content
   ============================================ */

.preview-content {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.preview-tab-content {
  display: none;
  position: absolute;
  inset: 0;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.preview-tab-content.active {
  display: block;
}

/* Staff tab - VexFlow container */
#preview-tab-staff #vexflow-container {
  min-height: 100%;
  padding: 8px;
}

/* VexFlow paragraph container */
.vexflow-paragraph {
  margin-bottom: 16px;
  border-radius: 8px;
  background: var(--bg-secondary, #f8f8f8);
  overflow: hidden;
}

.vexflow-paragraph.vexflow-paragraph-active {
  border-left: 3px solid var(--primary-color, #3b82f6);
  background: rgba(59, 130, 246, 0.04);
}

.vexflow-paragraph-header {
  display: flex;
  align-items: center;
  padding: 4px 8px;
  background: var(--bg-tertiary, #f0f0f0);
  border-bottom: 1px solid var(--border-color, #ddd);
}

.vexflow-play-btn {
  padding: 4px 12px;
  font-size: 14px;
  background: var(--accent-color, #007AFF);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.15s, transform 0.1s;
}

.vexflow-play-btn:hover {
  background: var(--accent-hover, #0056b3);
}

.vexflow-play-btn:active {
  transform: scale(0.95);
}

.vexflow-paragraph-target {
  padding: 8px;
  background: white;
  min-height: 60px;
}

.vexflow-paragraph-target svg {
  max-width: 100%;
  height: auto;
}

.vexflow-separator {
  height: 8px;
  background: transparent;
}

/* LilyPond placeholder */
.preview-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-tertiary, #999);
  gap: 8px;
  padding: 24px;
  text-align: center;
}

.preview-placeholder .placeholder-icon {
  font-size: 48px;
  opacity: 0.5;
}

.preview-placeholder .placeholder-text {
  font-size: 14px;
}

/* LilyPond render button */
.lilypond-render-btn {
  padding: 12px 32px;
  font-size: 16px;
  font-weight: 500;
  color: #fff;
  background: var(--accent-color, #007AFF);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.lilypond-render-btn:hover {
  background: var(--accent-hover, #0056b3);
}

.lilypond-render-btn:active {
  transform: scale(0.97);
}

/* Code tab - LilyPond source */
.lilypond-code-textarea {
  width: 100%;
  height: 100%;
  padding: 12px;
  margin: 0;
  border: none;
  outline: none;
  resize: none;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'SF Mono', 'Menlo', 'Monaco', 'Consolas', monospace;
  font-size: 12px;
  line-height: 1.5;
  white-space: pre;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

/* Markup tab - uses NotationFont for proper glyph rendering */
.markup-code-textarea {
  width: 100%;
  height: 100%;
  padding: 12px;
  margin: 0;
  border: none;
  outline: none;
  resize: none;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'NotationFont', sans-serif;
  font-size: 24px;
  line-height: 1.8;
  white-space: pre;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.lilypond-code-textarea::selection,
.markup-code-textarea::selection {
  background: rgba(59, 130, 246, 0.3);
}

/* ============================================
   Edit Markup Tab
   ============================================ */

.edit-markup-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.edit-markup-container .markup-code-textarea {
  flex: 1;
  min-height: 0;
}

.edit-markup-actions {
  display: flex;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.edit-markup-btn {
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  background: var(--accent-color, #007AFF);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.edit-markup-btn:hover {
  background: var(--accent-hover, #0056b3);
}

.edit-markup-btn:active {
  transform: scale(0.97);
}

.edit-markup-btn.secondary {
  background: var(--bg-tertiary, #e5e5e5);
  color: var(--text-primary);
}

.edit-markup-btn.secondary:hover {
  background: var(--border-color, #d0d0d0);
}

/* ============================================
   Font Inspector Tab
   ============================================ */

.font-inspector-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 8px;
  gap: 8px;
}

.font-inspector-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  flex-shrink: 0;
}

.font-inspector-controls label {
  font-weight: 500;
  color: var(--text-secondary);
}

.font-inspector-controls select {
  padding: 4px 8px;
  border: 1px solid var(--border-color, #ddd);
  border-radius: 4px;
  font-size: 12px;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.font-inspector-info {
  padding: 8px;
  background: #e3f2fd;
  border: 1px solid #90caf9;
  border-radius: 4px;
  font-size: 12px;
  color: #1565c0;
  flex-shrink: 0;
}

.font-inspector-textarea {
  flex: 1;
  min-height: 0;
  padding: 12px;
  border: 2px solid var(--border-color, #ddd);
  border-radius: 4px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'NotationFont', monospace;
  font-size: 24px;
  line-height: 1.8;
  overflow: auto;
  resize: none;
  -webkit-overflow-scrolling: touch;
}

.font-inspector-unicode {
  padding: 8px;
  background: var(--bg-secondary, #f5f5f5);
  border: 1px solid var(--border-color, #ddd);
  border-radius: 4px;
  font-size: 12px;
  font-family: 'SF Mono', 'Menlo', 'Monaco', 'Consolas', monospace;
  flex-shrink: 0;
  color: var(--text-secondary);
}

.font-inspector-view-notice {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-tertiary, #999);
  font-size: 14px;
  padding: 24px;
  text-align: center;
}

/* ============================================
   Preview Pane Base Layout
   ============================================ */

#preview-pane {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  transition: height 0.2s ease, flex 0.2s ease;
}

/* ============================================
   Preview Pane State Overrides
   ============================================ */

/* Hidden state - minimal header only */
#preview-pane.preview-hidden {
  height: auto;
  flex: 0 0 auto;
}

#preview-pane.preview-hidden .preview-content {
  display: none;
}

/* Peek state - show header + limited content */
#preview-pane.preview-peek {
  height: clamp(140px, 22vh, 200px);
  flex: 0 0 auto;
}

#preview-pane.preview-peek .preview-content {
  flex: 1;
  min-height: 0;
}

/* Expanded state - take available space */
#preview-pane.preview-expanded {
  flex: 1 1 auto;
  min-height: 200px;
}

#preview-pane.preview-expanded .preview-content {
  flex: 1;
  min-height: 0;
}

/* ============================================
   Responsive Breakpoints
   ============================================ */

/* Small screens (<600px): Single column, sheets for lyrics/preview */
/* This is the default mobile layout - no special rules needed */

/* Medium screens (600-1023px): pinned lyrics + collapsible preview */
@media (min-width: 600px) and (max-width: 1023px) {
  .preview-tab {
    padding: 8px 20px;
    font-size: 14px;
  }

  .lilypond-code-textarea {
    font-size: 13px;
    padding: 16px;
  }

  .markup-code-textarea {
    font-size: 28px;
    padding: 16px;
  }

  /* Pinned lyrics minimum height */
  .lyrics-sheet:not(.hidden) {
    min-height: 160px;
  }

  /* Preview pane minimum height when visible */
  #preview-pane:not(.preview-hidden) {
    min-height: 160px;
  }
}

/* ============================================
   Pane Resizer (between left and right panes)
   Only visible on large screens (>= 1024px)
   ============================================ */

.pane-resizer {
  display: none;  /* Hidden on mobile/tablet */
}


/* ============================================
   Container Query: Large screens (>=1024px)
   ============================================ */

@container app-layout (width >= 1024px) {
  #mobile-main {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto minmax(150px, 1fr) auto auto auto auto;
    gap: 0;
  }

  /* 3-column split-pane when View is docked (data attribute replaces body.view-docked) */
  #mobile-main[data-view-presentation="docked"][data-view="open"] {
    grid-template-columns: minmax(0, var(--left-pane-fr, 1fr)) 6px minmax(0, var(--right-pane-fr, 1fr));
  }

  #toolbelt-bar { grid-column: 1; grid-row: 2; }

  .pane-resizer { display: none; }

  #mobile-main[data-view-presentation="docked"][data-view="open"] .pane-resizer {
    display: flex;
    align-items: center;
    justify-content: center;
    grid-column: 2;
    grid-row: 1 / -2;
    position: relative;
    background: var(--bg-secondary, #f5f5f5);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    cursor: col-resize;
    user-select: none;
    -webkit-user-select: none;
    z-index: 10;
    transition: background-color 0.15s;
  }

  /* Wider transparent hit area for easier grabbing on trackpads */
  #mobile-main[data-view-presentation="docked"][data-view="open"] .pane-resizer::before {
    content: '';
    position: absolute;
    inset: 0 -8px;
    cursor: col-resize;
  }

  .pane-resizer:hover { background: var(--bg-tertiary, #e5e5e5); }
  .pane-resizer.dragging { background: var(--primary-color, #3b82f6); }

  .pane-resizer-handle {
    width: 4px;
    height: 48px;
    background: var(--text-tertiary, #999);
    border-radius: 2px;
    opacity: 0.5;
    transition: opacity 0.15s, background-color 0.15s;
  }
  .pane-resizer:hover .pane-resizer-handle,
  .pane-resizer.dragging .pane-resizer-handle { opacity: 1; background: var(--text-secondary, #666); }
  .pane-resizer.dragging .pane-resizer-handle { background: white; }

  #editor-pane { grid-column: 1; grid-row: 3; }
  #context-bar { grid-column: 1; grid-row: 4; }
  #insert-panel { grid-column: 1; grid-row: 5; }
  #symbols-bar { grid-column: 1; grid-row: 6; }

  #mobile-keyboard,
  .keyboard-mode-toggle,
  #virtual-keyboard-container,
  #chords-toolbar,
  #figures-toolbar { grid-column: 1; }

  #preview-pane { display: none; }
  .mobile-bottom-bar { grid-column: 1 / -1; grid-row: -1; }

  .preview-tabs { gap: 8px; }
  .preview-tab { padding: 8px 24px; font-size: 14px; }
  .lilypond-code-textarea { font-size: 14px; padding: 16px; }
  .markup-code-textarea { font-size: 32px; padding: 16px; }

  .lyrics-sheet {
    position: static; height: auto; min-height: 200px; max-height: none;
    border-radius: 0; box-shadow: none; z-index: auto;
  }
  .lyrics-sheet.hidden { display: none; }
}

/* Docked view: editor min-width + view placement (data attribute version) */
@container app-layout (width >= 1024px) {
  #mobile-main[data-view-presentation="docked"][data-view="open"] #editor-pane {
    min-width: 360px;
  }

  #mobile-main[data-view-presentation="docked"][data-view="open"] #view-overlay.view-docked {
    grid-column: 3;
    grid-row: 1 / -2;
    position: relative;
    transform: none;
  }

  #mobile-main[data-view-presentation="docked"][data-view="open"] #preview-pane {
    display: none;
  }
}

/* ============================================
   Dark Mode
   ============================================ */

@media (prefers-color-scheme: dark) {
  .preview-tabs {
    background: var(--bg-tertiary, #2a2a2a);
  }

  .preview-tab.active {
    background: var(--bg-secondary, #333);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  }

  .lilypond-code-textarea {
    background: var(--bg-secondary, #1e1e1e);
  }

  .markup-code-textarea {
    background: var(--bg-secondary, #1e1e1e);
  }

  .pane-resizer {
    background: var(--bg-tertiary, #2a2a2a);
    border-color: var(--border-color, #444);
  }

  .pane-resizer:hover {
    background: var(--bg-secondary, #333);
  }

  .pane-resizer-handle {
    background: var(--text-tertiary, #666);
  }

  .pane-resizer:hover .pane-resizer-handle {
    background: var(--text-secondary, #999);
  }

  .clef-selector {
    background: var(--bg-tertiary, #2a2a2a);
    border-color: var(--border-color, #444);
  }

  .clef-selector:hover {
    background: var(--bg-secondary, #333);
  }

  .clef-dropdown {
    background: var(--bg-secondary, #2a2a2a);
    border-color: var(--border-color, #444);
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  }

  .clef-option:hover {
    background: var(--bg-tertiary, #333);
  }

  /* Dark mode line type colors */
  .line-type-indicator[data-type="notation"] { background: #1565c0; color: #e3f2fd; }
  .line-type-indicator[data-type="lyrics"] { background: #7b1fa2; color: #f3e5f5; }
  .line-type-indicator[data-type="chords"] { background: #2e7d32; color: #e8f5e9; }
  .line-type-indicator[data-type="figures"] { background: #e65100; color: #fff3e0; }
  .line-type-indicator[data-type="tabla"] { background: #c2185b; color: #fce4ec; }
  .line-type-indicator[data-type="timed-text"] { background: #00838f; color: #e0f7fa; }
  .line-type-indicator[data-type="unknown"] { background: #424242; color: #fafafa; }

  /* Dark mode font inspector */
  .font-inspector-info {
    background: #1565c0;
    border-color: #1976d2;
    color: #e3f2fd;
  }

  .font-inspector-textarea {
    background: var(--bg-secondary, #1e1e1e);
    border-color: var(--border-color, #444);
  }

  .font-inspector-unicode {
    background: var(--bg-tertiary, #2a2a2a);
    border-color: var(--border-color, #444);
  }

  /* Dark mode edit markup actions */
  .edit-markup-actions {
    background: var(--bg-tertiary, #2a2a2a);
    border-color: var(--border-color, #444);
  }

  .edit-markup-btn.secondary {
    background: var(--bg-secondary, #333);
    color: var(--text-primary);
  }

  .edit-markup-btn.secondary:hover {
    background: var(--bg-tertiary, #444);
  }

  /* Dark mode: frame the white notation area so it looks intentional */
  .vexflow-paragraph-target {
    border-radius: 4px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  }

  #preview-tab-staff #vexflow-container {
    background: var(--bg-secondary, #111827);
    padding: 8px;
    border-radius: 6px;
  }

  /* Dark mode: preview hint pill */
  #preview-pane.preview-hidden .preview-header::after {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
  }
}