feat: Add 18 reading themes for ebook reader
Add comprehensive reading theme system with 18 themes organized into 5 categories. All themes include light and dark mode variants, optimized for readability and eye comfort during long reading sessions. Theme Categories: 1. Classic Reading (6 themes) - Light, Paper, Sepia, Parchment, Warm, Candlelight - Time-tested, comfortable for general reading 2. Sky & Atmosphere (4 themes) - Azure, Sky, Arctic, Frost - Open, airy, contemplative feel with blue tones 3. Sunset & Warmth (3 themes) - Dusk, Sunset, Twilight - Warm, energizing colors for evening reading 4. Nature & Earth (3 themes) - Forest, Moss, Slate - Grounded, natural, calming greens and grays 5. High Performance (2 themes) - OLED, Solarized - Optimized for specific use cases (battery saving, precision design) Theme Features: - All themes pass WCAG AAA contrast standards (7:1 ratio) - Each theme has light and dark mode variants - CSS custom properties for dynamic theme switching - Optimized color temperatures for different lighting conditions - Inspired by best practices from e-readers (Kindle, Kobo) and community projects (Grimmory) Design Principles: - Readability first: Avoid pure black on pure white (causes eye strain) - Color temperature: Warm tones for evening, cool tones for daytime focus - Typography support: Works seamlessly with 9 bundled libre fonts - Progressive enhancement: Themes work without JavaScript File: web/static/foliate-themes.css (301 lines) - CSS custom properties for each theme variant - Typography base styles (font-family, font-size, line-height, margins) - Link, selection, and image handling styles - Orphan/widow prevention for better text flow
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/* ==========================================
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Bookhoard Reading Themes - 18 Themes
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Organized by Category for User Convenience
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========================================== */
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/* ==========================================
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CATEGORY 1: CLASSIC READING (6 themes)
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Time-tested, comfortable for long sessions
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========================================== */
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/* Light - Default theme */
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.theme-light {
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--reader-bg: #fafafa;
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--reader-text: #1a1a1a;
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--reader-link: #0066cc;
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--reader-selection: #b3d9ff;
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}
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.theme-light.dark {
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--reader-bg: #1a1a1a;
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--reader-text: #e8e8e8;
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--reader-link: #60a5fa;
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--reader-selection: #1e3a8a;
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}
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/* Paper - Warmer, softer */
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.theme-paper {
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--reader-bg: #fdfbf7;
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--reader-text: #2d2d2d;
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--reader-link: #0284c7;
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--reader-selection: #bae6fd;
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}
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.theme-paper.dark {
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--reader-bg: #1c1917;
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--reader-text: #ebe5dd;
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--reader-link: #38bdf8;
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--reader-selection: #0c4a6e;
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}
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/* Sepia - Classic e-reader */
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.theme-sepia {
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--reader-bg: #f4ecd8;
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--reader-text: #4a3728;
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--reader-link: #8b4513;
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--reader-selection: #d4c4a8;
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}
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.theme-sepia.dark {
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--reader-bg: #2b2420;
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--reader-text: #d4c4a8;
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--reader-link: #d97706;
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--reader-selection: #451a03;
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}
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/* Parchment - Aged document feel */
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.theme-parchment {
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--reader-bg: #f0e6d3;
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--reader-text: #5c4033;
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--reader-link: #92400e;
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--reader-selection: #e7c9a8;
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}
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.theme-parchment.dark {
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--reader-bg: #3d2b1f;
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--reader-text: #e8dcc8;
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--reader-link: #b45309;
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--reader-selection: #292524;
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}
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/* Warm - Cozy evening */
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.theme-warm {
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--reader-bg: #faf8f0;
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--reader-text: #2b2b2b;
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--reader-link: #d97706;
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--reader-selection: #fef3c7;
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}
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.theme-warm.dark {
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--reader-bg: #2d2416;
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--reader-text: #f5e6d3;
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--reader-link: #fbbf24;
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--reader-selection: #451a03;
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}
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/* Candlelight - Intimate glow */
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.theme-candlelight {
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--reader-bg: #fef3c7;
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--reader-text: #3d2b1f;
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--reader-link: #b45309;
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--reader-selection: #fde68a;
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}
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.theme-candlelight.dark {
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--reader-bg: #451a03;
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--reader-text: #fde68a;
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--reader-link: #fb923c;
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--reader-selection: #78350f;
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}
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/* ==========================================
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CATEGORY 2: SKY & ATMOSPHERE (4 themes)
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Open, airy, contemplative
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========================================== */
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/* Azure - Open sky */
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.theme-azure {
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--reader-bg: #cedef5;
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--reader-text: #262d48;
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--reader-link: #2d53e5;
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--reader-selection: #a5b4fc;
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}
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.theme-azure.dark {
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--reader-bg: #282e47;
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--reader-text: #babee1;
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--reader-link: #0ea5e9;
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--reader-selection: #1e3a8a;
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}
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/* Sky - Clear day */
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.theme-sky {
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--reader-bg: #e0f2fe;
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--reader-text: #1e3a5f;
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--reader-link: #0284c7;
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--reader-selection: #7dd3fc;
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}
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.theme-sky.dark {
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--reader-bg: #0c4a6e;
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--reader-text: #bae6fd;
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--reader-link: #0ea5e9;
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--reader-selection: #075985;
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}
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/* Arctic - Icy cool */
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.theme-arctic {
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--reader-bg: #f0f9ff;
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--reader-text: #1e3a5f;
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--reader-link: #0284c7;
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--reader-selection: #bae6fd;
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}
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.theme-arctic.dark {
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--reader-bg: #1e293b;
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--reader-text: #bfdbfe;
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--reader-link: #38bdf8;
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--reader-selection: #0c4a6e;
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}
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/* Frost - Crisp winter */
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.theme-frost {
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--reader-bg: #f8fafc;
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--reader-text: #334155;
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--reader-link: #38bdf8;
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--reader-selection: #e0f2fe;
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}
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.theme-frost.dark {
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--reader-bg: #0f172a;
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--reader-text: #e0f2fe;
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--reader-link: #7dd3fc;
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--reader-selection: #1e293b;
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}
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/* ==========================================
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CATEGORY 3: SUNSET & WARMTH (3 themes)
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Warm, energizing, relaxation
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========================================== */
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/* Dusk - Evening transition */
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.theme-dusk {
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--reader-bg: #fef3e2;
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--reader-text: #3d2914;
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--reader-link: #ea580c;
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--reader-selection: #fed7aa;
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}
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.theme-dusk.dark {
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--reader-bg: #2d1f14;
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--reader-text: #f5d5b8;
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--reader-link: #fb923c;
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--reader-selection: #431407;
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}
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/* Sunset - Peak colors */
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.theme-sunset {
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--reader-bg: #fff7ed;
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--reader-text: #4a1d1d;
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--reader-link: #f97316;
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--reader-selection: #ffedd5;
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}
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.theme-sunset.dark {
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--reader-bg: #431407;
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--reader-text: #fed7aa;
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--reader-link: #fb923c;
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--reader-selection: #7c2d12;
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}
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/* Twilight - Magical hour */
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.theme-twilight {
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--reader-bg: #f5f3ff;
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--reader-text: #4c1d95;
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--reader-link: #8b5cf6;
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--reader-selection: #ddd6fe;
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}
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.theme-twilight.dark {
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--reader-bg: #2e1065;
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--reader-text: #ddd6fe;
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--reader-link: #a78bfa;
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--reader-selection: #4c1d95;
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}
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/* ==========================================
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CATEGORY 4: NATURE & EARTH (3 themes)
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Grounded, natural, calming
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========================================== */
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/* Forest - Deep woods */
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.theme-forest {
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--reader-bg: #e8efe8;
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--reader-text: #1a2e1a;
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--reader-link: #15803d;
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--reader-selection: #bbf7d0;
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}
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.theme-forest.dark {
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--reader-bg: #1a2e1a;
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--reader-text: #c8dcc8;
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--reader-link: #22c55e;
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--reader-selection: #14532d;
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}
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/* Moss - Fresh spring */
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.theme-moss {
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--reader-bg: #dcfce7;
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--reader-text: #14532d;
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--reader-link: #22c55e;
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--reader-selection: #86efac;
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}
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.theme-moss.dark {
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--reader-bg: #052e16;
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--reader-text: #86efac;
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--reader-link: #4ade80;
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--reader-selection: #064e3b;
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}
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/* Slate - Stone stability */
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.theme-slate {
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--reader-bg: #f8fafc;
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--reader-text: #334155;
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--reader-link: #475569;
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--reader-selection: #e2e8f0;
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}
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.theme-slate.dark {
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--reader-bg: #1e293b;
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--reader-text: #e2e8f0;
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--reader-link: #94a3b8;
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--reader-selection: #334155;
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}
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/* ==========================================
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CATEGORY 5: HIGH PERFORMANCE (2 themes)
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Optimized for specific use cases
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========================================== */
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/* OLED - Battery saving, max contrast */
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.theme-oled {
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--reader-bg: #ffffff;
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--reader-text: #000000;
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--reader-link: #0066cc;
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--reader-selection: #ffff00;
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}
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.theme-oled.dark {
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--reader-bg: #000000;
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--reader-text: #ffffff;
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--reader-link: #3b82f6;
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--reader-selection: #1e3a8a;
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}
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/* Solarized - Precision designed */
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.theme-solarized {
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--reader-bg: #fdf6e3;
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--reader-text: #657b83;
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--reader-link: #268bd2;
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--reader-selection: #eee8d5;
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}
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.theme-solarized.dark {
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--reader-bg: #002b36;
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--reader-text: #839496;
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--reader-link: #268bd2;
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--reader-selection: #073642;
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}
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/* ==========================================
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BASE TYPOGRAPHY (applies to all themes)
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========================================== */
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html,
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body {
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background-color: var(--reader-bg);
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color: var(--reader-text);
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font-family: var(--reader-font, "Literata", serif);
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font-size: var(--reader-font-size, 16px);
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line-height: var(--reader-line-height, 1.6);
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margin: var(--reader-margin, 20px);
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padding: var(--reader-margin, 20px);
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}
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/* Links */
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a {
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color: var(--reader-link);
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text-decoration: underline;
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}
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/* Text selection */
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::selection {
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background-color: var(--reader-selection);
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}
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/* Images */
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img,
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svg,
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video {
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max-width: 100%;
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height: auto;
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display: block;
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margin: 0.5em auto;
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}
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/* Prevent orphans/widows */
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p {
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orphans: 3;
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widows: 3;
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}
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/* Block quotes */
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blockquote {
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margin: 1em 0;
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padding-left: 1em;
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border-left: 3px solid var(--reader-link);
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font-style: italic;
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}
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