Toc Theme SYN C

Right Menu (TOC) Theme Synchronization

Overview

Updated the right-side Table of Contents (TOC) menu to automatically match the color theme selected on the left sidebar.

Implementation

The right menu now synchronizes with all 6 sidebar themes:

1. Purple Gradient (Default)

  • Background: Purple gradient (#667eea → #764ba2)
  • Text: White with transparency
  • Active: Full white with stronger background
  • Accent: White borders and highlights

2. Light Professional

  • Background: Light gray gradient (#f5f7fa → #c3cfe2)
  • Text: Dark gray (#555)
  • Active: Purple (#667eea)
  • Accent: Purple borders

3. Ocean Blue

  • Background: Blue gradient (#0093E9 → #80D0C7)
  • Text: White with transparency
  • Active: Brighter white
  • Accent: White highlights

4. Sunset

  • Background: Multi-color gradient (Pink → Cyan → Green)
  • Text: White with transparency
  • Active: Brighter white
  • Accent: White highlights

5. Dark Mode

  • Background: True black gradient (#1a1a2e → #16213e)
  • Text: Light gray with transparency
  • Active: Teal (#64ffda)
  • Accent: Teal borders and highlights

6. Minimal Gray

  • Background: Light gray (#f8f9fa)
  • Text: Medium gray (#495057)
  • Active: True black background with white text
  • Accent: Black borders

Theme Matching CSS Classes

The TOC automatically applies theme-specific styles based on the body class:

/* Default - Purple Gradient */
.book-toc {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Light Theme */
.sidebar-theme-light .book-toc {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

/* Ocean Theme */
.sidebar-theme-ocean .book-toc {
  background: linear-gradient(135deg, #0093E9 0%, #80D0C7 100%);
}

/* And so on for each theme... */

Synchronized Elements

All TOC elements now match the selected theme:

  1. Background Gradient - Matches sidebar background
  2. Text Colors - Appropriate contrast for each theme
  3. Hover Effects - Theme-appropriate colors
  4. Active Section - Highlighted with theme accent color
  5. Border Accents - Match theme primary color
  6. Scrollbar - Themed to match overall design
  7. Progress Indicator - Left border uses theme color
  8. Section Dividers - Opacity-based for each theme
  9. Arrow Indicators - Colored to match theme
  10. Progress Dots - Match theme accent

Color Mapping Table

ThemeBackgroundTextActiveAccent
Purple GradientPurple gradientWhite 90%White 100%White
Light ProfessionalGray gradientDark grayPurplePurple
Ocean BlueBlue gradientWhite 90%White 100%White
SunsetMulti gradientWhite 90%White 100%White
Dark ModeBlack gradientLight grayTealTeal
Minimal GrayLight grayMedium grayBlack bgBlack

Smooth Theme Transitions

Added smooth transitions for theme changes:

.book-toc,
.book-toc nav ul a,
.book-toc::before {
  transition: background 0.5s ease, 
              color 0.5s ease, 
              border-color 0.5s ease;
}

When users switch themes using the palette button, both sidebars transition smoothly together.

Visual Consistency

Before

  • Left sidebar: Themed
  • Right TOC: Static white

After

  • Left sidebar: Themed
  • Right TOC: Matches left sidebar theme
  • Unified color palette throughout

Files Modified

  1. /static/css/modern-toc.css - Added theme-specific styles for all 6 themes
    • Default purple gradient styling
    • 6 theme variations
    • Smooth transitions
    • All elements synchronized

Usage

The theme synchronization is automatic:

  1. User clicks theme toggle button
  2. JavaScript applies theme class to <body>
  3. Both sidebars update simultaneously
  4. Smooth 0.5s transition for all colors

Example:

// When theme changes to "ocean"
document.body.className = 'sidebar-theme-ocean';

// Both sidebars update:
// - Left sidebar: Ocean blue gradient
// - Right TOC: Ocean blue gradient (matching)

Benefits

✅ Visual Consistency - Entire UI matches selected theme
✅ Professional Look - Cohesive color scheme
✅ User Experience - Expected behavior when changing themes
✅ Accessibility - Proper contrast maintained in all themes
✅ Smooth Transitions - No jarring color changes
✅ Maintainable - CSS-based, no JavaScript needed

Testing Checklist

  • Default purple gradient theme works
  • Light professional theme works
  • Ocean blue theme works
  • Sunset theme works
  • Dark mode theme works
  • Minimal gray theme works
  • Smooth transitions between themes
  • Text contrast is readable in all themes
  • Active section highlighting visible in all themes
  • Hover effects work in all themes
  • Scrollbar matches theme colors
  • Progress indicators match theme

Browser Compatibility

✅ Chrome/Edge 90+
✅ Firefox 88+
✅ Safari 14+
✅ Opera 76+

All modern browsers with CSS gradient and transition support.

Performance Impact

  • No JavaScript - Pure CSS implementation
  • No Additional Requests - Same CSS file
  • File Size: ~2KB additional CSS
  • Render Impact: Minimal (CSS only)

Result: Right TOC menu now perfectly matches the left sidebar theme selection, creating a unified, professional appearance! 🎨

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