/**
 * Texmeta Kindle - Ultra Premium Reader Styles
 * World-Class Kindle-like Reading Experience v3.0
 * ================================================
 * Features:
 * - 6 reading themes (daylight, dark, sepia, midnight, paper, forest)
 * - Page flip animations
 * - Two-page spread mode
 * - Glassmorphism effects
 * - Distraction-free zen mode
 * - Table of contents sidebar
 * - Reading stats overlay
 * - Auto-scroll indicators
 * - Premium micro-interactions
 * - Accessibility enhancements
 */

/* ================================================
   CSS CUSTOM PROPERTIES (THEME TOKENS)
   ================================================ */
:root {
    --tk-font-reading: Georgia, 'Times New Roman', serif;
    --tk-font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --tk-font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --tk-font-size: 18px;
    --tk-line-height: 1.8;
    --tk-letter-spacing: 0;
    --tk-content-max-width: 720px;
    --tk-sidebar-width: 340px;
    --tk-toolbar-height: 56px;
    --tk-footer-height: 42px;
    --tk-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --tk-transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --tk-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    --tk-radius-sm: 8px;
    --tk-radius-md: 12px;
    --tk-radius-lg: 16px;
    --tk-radius-xl: 24px;
    --tk-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --tk-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --tk-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.15);
    --tk-shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.2);
    --tk-glow: 0 0 40px rgba(99, 102, 241, 0.15);
}

/* -- DAYLIGHT THEME (Crisp White) -- */
[data-theme="daylight"] {
    --tk-bg: #ffffff;
    --tk-bg-secondary: #fafafa;
    --tk-text: #1a1a1a;
    --tk-text-muted: #6b7280;
    --tk-text-subtle: #9ca3af;
    --tk-toolbar-bg: rgba(255, 255, 255, 0.85);
    --tk-toolbar-border: rgba(0, 0, 0, 0.06);
    --tk-sidebar-bg: rgba(249, 250, 251, 0.98);
    --tk-sidebar-border: #e5e7eb;
    --tk-card-bg: #ffffff;
    --tk-card-border: #e5e7eb;
    --tk-card-hover: #f9fafb;
    --tk-accent: #6366f1;
    --tk-accent-hover: #4f46e5;
    --tk-accent-soft: rgba(99, 102, 241, 0.1);
    --tk-input-bg: #f3f4f6;
    --tk-input-focus: #f0f0ff;
    --tk-overlay: rgba(0, 0, 0, 0.5);
    --tk-progress-track: #e5e7eb;
    --tk-progress-fill: linear-gradient(90deg, #6366f1, #8b5cf6);
    --tk-selection-bg: rgba(99, 102, 241, 0.2);
    --tk-success: #10b981;
    --tk-warning: #f59e0b;
    --tk-danger: #ef4444;
    --tk-gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --tk-gradient-soft: linear-gradient(180deg, rgba(99, 102, 241, 0.05) 0%, transparent 100%);
    --tk-page-shadow: 0 0 30px rgba(0, 0, 0, 0.08);
}

/* -- DARK THEME (Pure Dark) -- */
[data-theme="dark"] {
    --tk-bg: #0a0a0b;
    --tk-bg-secondary: #111113;
    --tk-text: #f4f4f5;
    --tk-text-muted: #a1a1aa;
    --tk-text-subtle: #71717a;
    --tk-toolbar-bg: rgba(17, 17, 19, 0.9);
    --tk-toolbar-border: rgba(255, 255, 255, 0.06);
    --tk-sidebar-bg: rgba(17, 17, 19, 0.98);
    --tk-sidebar-border: #27272a;
    --tk-card-bg: #18181b;
    --tk-card-border: #27272a;
    --tk-card-hover: #1f1f23;
    --tk-accent: #818cf8;
    --tk-accent-hover: #a5b4fc;
    --tk-accent-soft: rgba(129, 140, 248, 0.12);
    --tk-input-bg: #1f1f23;
    --tk-input-focus: #252530;
    --tk-overlay: rgba(0, 0, 0, 0.8);
    --tk-progress-track: #27272a;
    --tk-progress-fill: linear-gradient(90deg, #818cf8, #a78bfa);
    --tk-selection-bg: rgba(129, 140, 248, 0.3);
    --tk-success: #34d399;
    --tk-warning: #fbbf24;
    --tk-danger: #f87171;
    --tk-gradient-primary: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
    --tk-gradient-soft: linear-gradient(180deg, rgba(129, 140, 248, 0.05) 0%, transparent 100%);
    --tk-page-shadow: 0 0 40px rgba(0, 0, 0, 0.4);
}

/* -- SEPIA THEME (Warm Paper) -- */
[data-theme="sepia"] {
    --tk-bg: #f8f1e3;
    --tk-bg-secondary: #f4ebd9;
    --tk-text: #3d3022;
    --tk-text-muted: #7a6950;
    --tk-text-subtle: #a69278;
    --tk-toolbar-bg: rgba(244, 235, 217, 0.92);
    --tk-toolbar-border: rgba(139, 115, 85, 0.12);
    --tk-sidebar-bg: rgba(240, 230, 208, 0.98);
    --tk-sidebar-border: #d4c5ab;
    --tk-card-bg: #f4ecd8;
    --tk-card-border: #d4c5ab;
    --tk-card-hover: #efe5cf;
    --tk-accent: #b45309;
    --tk-accent-hover: #92400e;
    --tk-accent-soft: rgba(180, 83, 9, 0.1);
    --tk-input-bg: #ede4cf;
    --tk-input-focus: #f0e8d5;
    --tk-overlay: rgba(67, 52, 34, 0.55);
    --tk-progress-track: #d4c5ab;
    --tk-progress-fill: linear-gradient(90deg, #d97706, #b45309);
    --tk-selection-bg: rgba(180, 83, 9, 0.2);
    --tk-success: #059669;
    --tk-warning: #d97706;
    --tk-danger: #dc2626;
    --tk-gradient-primary: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    --tk-gradient-soft: linear-gradient(180deg, rgba(180, 83, 9, 0.05) 0%, transparent 100%);
    --tk-page-shadow: 0 0 30px rgba(100, 70, 40, 0.1);
}

/* -- MIDNIGHT THEME (Deep Blue) -- */
[data-theme="midnight"] {
    --tk-bg: #0c1220;
    --tk-bg-secondary: #111827;
    --tk-text: #e2e8f0;
    --tk-text-muted: #94a3b8;
    --tk-text-subtle: #64748b;
    --tk-toolbar-bg: rgba(17, 24, 39, 0.92);
    --tk-toolbar-border: rgba(100, 116, 139, 0.15);
    --tk-sidebar-bg: rgba(30, 41, 59, 0.98);
    --tk-sidebar-border: #334155;
    --tk-card-bg: #1e293b;
    --tk-card-border: #334155;
    --tk-card-hover: #263347;
    --tk-accent: #38bdf8;
    --tk-accent-hover: #7dd3fc;
    --tk-accent-soft: rgba(56, 189, 248, 0.12);
    --tk-input-bg: #1e293b;
    --tk-input-focus: #263347;
    --tk-overlay: rgba(0, 0, 0, 0.75);
    --tk-progress-track: #1e293b;
    --tk-progress-fill: linear-gradient(90deg, #0ea5e9, #38bdf8);
    --tk-selection-bg: rgba(56, 189, 248, 0.25);
    --tk-success: #2dd4bf;
    --tk-warning: #fbbf24;
    --tk-danger: #fb7185;
    --tk-gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 100%);
    --tk-gradient-soft: linear-gradient(180deg, rgba(56, 189, 248, 0.05) 0%, transparent 100%);
    --tk-page-shadow: 0 0 40px rgba(0, 20, 50, 0.3);
}

/* -- PAPER THEME (Classic Book) -- */
[data-theme="paper"] {
    --tk-bg: #f5f0e6;
    --tk-bg-secondary: #efe9dc;
    --tk-text: #2c2416;
    --tk-text-muted: #5c4f3a;
    --tk-text-subtle: #8a7a62;
    --tk-toolbar-bg: rgba(239, 233, 220, 0.94);
    --tk-toolbar-border: rgba(100, 80, 50, 0.1);
    --tk-sidebar-bg: rgba(239, 233, 220, 0.98);
    --tk-sidebar-border: #d5cab8;
    --tk-card-bg: #f0e9dc;
    --tk-card-border: #d5cab8;
    --tk-card-hover: #eae3d4;
    --tk-accent: #8b5a2b;
    --tk-accent-hover: #6d4522;
    --tk-accent-soft: rgba(139, 90, 43, 0.1);
    --tk-input-bg: #e8e0d0;
    --tk-input-focus: #ece5d7;
    --tk-overlay: rgba(44, 36, 22, 0.5);
    --tk-progress-track: #d5cab8;
    --tk-progress-fill: linear-gradient(90deg, #a0714a, #8b5a2b);
    --tk-selection-bg: rgba(139, 90, 43, 0.2);
    --tk-success: #16a34a;
    --tk-warning: #ca8a04;
    --tk-danger: #dc2626;
    --tk-gradient-primary: linear-gradient(135deg, #a0714a 0%, #8b5a2b 100%);
    --tk-gradient-soft: linear-gradient(180deg, rgba(139, 90, 43, 0.04) 0%, transparent 100%);
    --tk-page-shadow: 0 0 25px rgba(80, 60, 30, 0.1);
}

/* -- FOREST THEME (Nature Green) -- */
[data-theme="forest"] {
    --tk-bg: #0f1910;
    --tk-bg-secondary: #141f15;
    --tk-text: #d4e5d6;
    --tk-text-muted: #8fac92;
    --tk-text-subtle: #5f7962;
    --tk-toolbar-bg: rgba(20, 31, 21, 0.92);
    --tk-toolbar-border: rgba(100, 140, 100, 0.12);
    --tk-sidebar-bg: rgba(20, 31, 21, 0.98);
    --tk-sidebar-border: #2d452f;
    --tk-card-bg: #1a2b1c;
    --tk-card-border: #2d452f;
    --tk-card-hover: #223824;
    --tk-accent: #4ade80;
    --tk-accent-hover: #86efac;
    --tk-accent-soft: rgba(74, 222, 128, 0.12);
    --tk-input-bg: #1a2b1c;
    --tk-input-focus: #223824;
    --tk-overlay: rgba(0, 10, 0, 0.75);
    --tk-progress-track: #2d452f;
    --tk-progress-fill: linear-gradient(90deg, #22c55e, #4ade80);
    --tk-selection-bg: rgba(74, 222, 128, 0.25);
    --tk-success: #4ade80;
    --tk-warning: #fbbf24;
    --tk-danger: #f87171;
    --tk-gradient-primary: linear-gradient(135deg, #22c55e 0%, #4ade80 100%);
    --tk-gradient-soft: linear-gradient(180deg, rgba(74, 222, 128, 0.05) 0%, transparent 100%);
    --tk-page-shadow: 0 0 35px rgba(0, 30, 0, 0.25);
}

/* ================================================
   READER APP CONTAINER
   ================================================ */
#texmeta-reader-app {
    position: fixed;
    inset: 0;
    z-index: 999999;
    display: flex;
    flex-direction: column;
    font-family: var(--tk-font-ui);
    background: var(--tk-bg);
    color: var(--tk-text);
    transition: 
        background var(--tk-transition), 
        color var(--tk-transition);
    overflow: hidden;
    isolation: isolate;
}

/* Zen mode (distraction-free) */
#texmeta-reader-app.zen-mode .reader-toolbar,
#texmeta-reader-app.zen-mode .reader-footer {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-100%);
}

#texmeta-reader-app.zen-mode .reader-footer {
    transform: translateY(100%);
}

#texmeta-reader-app.zen-mode:hover .reader-toolbar,
#texmeta-reader-app.zen-mode:hover .reader-footer {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* DRM: global select prevention */
#texmeta-reader-app,
#texmeta-reader-app * {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Allow selection only inside DOCX content for highlighting */
#docx-content,
#docx-content * {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

#docx-content ::selection {
    background: var(--tk-selection-bg);
}

/* ================================================
   TOOLBAR - Premium Glassmorphism
   ================================================ */
.reader-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--tk-toolbar-height);
    padding: 0 20px;
    background: var(--tk-toolbar-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--tk-toolbar-border);
    flex-shrink: 0;
    z-index: 100;
    transition: 
        background var(--tk-transition), 
        border-color var(--tk-transition),
        transform var(--tk-transition),
        opacity var(--tk-transition);
    position: relative;
}

.reader-toolbar::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--tk-gradient-soft);
    opacity: 0.5;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.toolbar-center {
    font-size: 13px;
    color: var(--tk-text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
}

.toolbar-center .page-indicator {
    padding: 6px 14px;
    background: var(--tk-accent-soft);
    border-radius: 20px;
    font-weight: 600;
    color: var(--tk-accent);
    font-size: 12px;
    letter-spacing: 0.3px;
}

.toolbar-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--tk-text);
    cursor: pointer;
    border-radius: var(--tk-radius-sm);
    transition: all var(--tk-transition-fast);
    padding: 0;
    position: relative;
}

.toolbar-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--tk-accent);
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--tk-transition-fast);
}

.toolbar-btn:hover::before {
    opacity: 0.1;
    transform: scale(1);
}

.toolbar-btn:hover {
    color: var(--tk-accent);
}

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

.toolbar-btn.active {
    color: var(--tk-accent);
}

.toolbar-btn.active::before {
    opacity: 0.15;
    transform: scale(1);
}

.toolbar-btn svg {
    position: relative;
    z-index: 1;
}

/* Tooltip for toolbar buttons */
.toolbar-btn[title]::after {
    content: attr(title);
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    padding: 6px 10px;
    background: var(--tk-card-bg);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-sm);
    font-size: 11px;
    font-weight: 500;
    color: var(--tk-text);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--tk-transition-fast);
    box-shadow: var(--tk-shadow-md);
    z-index: 1000;
}

.toolbar-btn:hover[title]::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.book-title-area {
    margin-left: 16px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.toolbar-book-title {
    font-size: 15px;
    font-weight: 600;
    line-height: 1.3;
    max-width: 320px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--tk-text);
}

.toolbar-book-author {
    font-size: 12px;
    color: var(--tk-text-muted);
    font-weight: 400;
}

/* ================================================
   READER BODY (Sidebar + Viewport)
   ================================================ */
.reader-body {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
    background: var(--tk-gradient-soft);
}

/* ================================================
   SIDEBAR - Enhanced with Glassmorphism
   ================================================ */
.reader-sidebar {
    width: var(--tk-sidebar-width);
    background: var(--tk-sidebar-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-right: 1px solid var(--tk-sidebar-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateX(-100%);
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 90;
    transition: transform var(--tk-spring);
    box-shadow: var(--tk-shadow-lg);
}

.reader-sidebar.open {
    transform: translateX(0);
}

/* Sidebar backdrop */
.sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: var(--tk-overlay);
    opacity: 0;
    visibility: hidden;
    z-index: 85;
    transition: all var(--tk-transition);
}

.sidebar-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.sidebar-tabs {
    display: flex;
    border-bottom: 1px solid var(--tk-sidebar-border);
    flex-shrink: 0;
    background: var(--tk-bg-secondary);
    padding: 4px;
    gap: 4px;
    margin: 12px 12px 0;
    border-radius: var(--tk-radius-md);
}

.sidebar-tab {
    flex: 1;
    padding: 10px 8px;
    background: transparent;
    border: none;
    color: var(--tk-text-muted);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--tk-radius-sm);
    transition: all var(--tk-transition-fast);
    font-family: var(--tk-font-ui);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
}

.sidebar-tab:hover {
    color: var(--tk-text);
    background: var(--tk-card-hover);
}

.sidebar-tab.active {
    color: var(--tk-accent);
    background: var(--tk-card-bg);
    box-shadow: var(--tk-shadow-sm);
}

/* Tab badge for counts */
.sidebar-tab .tab-badge {
    position: absolute;
    top: 4px;
    right: 8px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: var(--tk-accent);
    color: white;
    font-size: 10px;
    font-weight: 700;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-header {
    padding: 16px 16px 12px;
    border-bottom: 1px solid var(--tk-sidebar-border);
}

.sidebar-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    color: var(--tk-text);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--tk-accent-soft) transparent;
}

.sidebar-content::-webkit-scrollbar {
    width: 6px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--tk-accent-soft);
    border-radius: 3px;
}

.sidebar-panel {
    display: none;
    padding: 16px;
    animation: panel-fade-in 0.25s ease;
}

@keyframes panel-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.sidebar-empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--tk-text-muted);
    font-size: 14px;
    line-height: 1.7;
}

.sidebar-empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.sidebar-empty small {
    display: block;
    margin-top: 8px;
    opacity: 0.7;
    font-size: 13px;
}

/* Sidebar Items - Premium Cards */
.sidebar-item {
    padding: 14px 16px;
    background: var(--tk-card-bg);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-md);
    margin-bottom: 10px;
    position: relative;
    cursor: pointer;
    transition: all var(--tk-transition-fast);
    overflow: hidden;
}

.sidebar-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--tk-gradient-primary);
    opacity: 0;
    transition: opacity var(--tk-transition-fast);
}

.sidebar-item:hover {
    border-color: var(--tk-accent);
    transform: translateY(-2px);
    box-shadow: var(--tk-shadow-md);
}

.sidebar-item:hover::before {
    opacity: 0.03;
}

.sidebar-item .item-text {
    font-size: 13px;
    line-height: 1.6;
    color: var(--tk-text);
    margin-bottom: 8px;
    position: relative;
    font-style: italic;
}

.sidebar-item .item-text::before {
    content: '"';
    font-size: 20px;
    position: absolute;
    left: -4px;
    top: -4px;
    color: var(--tk-accent);
    opacity: 0.5;
}

.sidebar-item .item-meta {
    font-size: 11px;
    color: var(--tk-text-subtle);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.sidebar-item .item-note {
    background: var(--tk-accent-soft);
    padding: 10px 12px;
    border-radius: var(--tk-radius-sm);
    margin-top: 10px;
    font-size: 12px;
    color: var(--tk-text);
    line-height: 1.5;
}

.sidebar-item .item-color-strip {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    border-radius: var(--tk-radius-md) 0 0 var(--tk-radius-md);
}

.sidebar-item .item-delete {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 24px;
    height: 24px;
    background: var(--tk-danger);
    border: none;
    color: white;
    cursor: pointer;
    font-size: 12px;
    opacity: 0;
    transition: all var(--tk-transition-fast);
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.8);
}

.sidebar-item:hover .item-delete {
    opacity: 1;
    transform: scale(1);
}

.sidebar-item .item-delete:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* ================================================
   READER VIEWPORT - Premium Reading Area
   ================================================ */
.reader-viewport {
    flex: 1;
    overflow: hidden;
    position: relative;
    display: flex;
    background: var(--tk-bg);
}

.reader-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    scroll-behavior: smooth;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--tk-accent-soft) transparent;
}

.reader-content::-webkit-scrollbar {
    width: 8px;
}

.reader-content::-webkit-scrollbar-track {
    background: transparent;
}

.reader-content::-webkit-scrollbar-thumb {
    background: var(--tk-accent-soft);
    border-radius: 4px;
}

.reader-content::-webkit-scrollbar-thumb:hover {
    background: var(--tk-accent);
}

/* DOCX Reader - Book-like styling */
#docx-reader {
    padding: 48px 24px 80px;
    display: flex;
    justify-content: center;
}

#docx-content {
    max-width: var(--tk-content-max-width);
    width: 100%;
    margin: 0 auto;
    font-family: var(--tk-font-reading);
    font-size: var(--tk-font-size);
    line-height: var(--tk-line-height);
    letter-spacing: var(--tk-letter-spacing);
    color: var(--tk-text);
    word-wrap: break-word;
    overflow-wrap: break-word;
    transition: 
        font-size var(--tk-transition), 
        line-height var(--tk-transition),
        max-width var(--tk-transition);
    
    /* Paper effect */
    background: var(--tk-bg);
    padding: 48px 56px;
    border-radius: var(--tk-radius-lg);
    box-shadow: var(--tk-page-shadow);
    position: relative;
    min-height: 100vh;
}

/* Book page edge effect */
#docx-content::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to right, 
        rgba(0,0,0,0.04) 0%, 
        rgba(0,0,0,0.01) 50%,
        transparent 100%);
    border-radius: var(--tk-radius-lg) 0 0 var(--tk-radius-lg);
}

[data-theme="dark"] #docx-content::before,
[data-theme="midnight"] #docx-content::before,
[data-theme="forest"] #docx-content::before {
    background: linear-gradient(to right, 
        rgba(255,255,255,0.03) 0%, 
        rgba(255,255,255,0.01) 50%,
        transparent 100%);
}

#docx-content p {
    margin: 0 0 1.2em;
    text-align: justify;
    hyphens: auto;
    -webkit-hyphens: auto;
}

/* First paragraph drop cap */
#docx-content > p:first-of-type::first-letter {
    float: left;
    font-size: 3.5em;
    line-height: 0.8;
    padding: 4px 12px 4px 0;
    font-weight: 700;
    color: var(--tk-accent);
}

#docx-content h1,
#docx-content h2,
#docx-content h3,
#docx-content h4,
#docx-content h5,
#docx-content h6 {
    font-family: var(--tk-font-ui);
    font-weight: 700;
    margin: 2em 0 0.75em;
    color: var(--tk-text);
    line-height: 1.3;
    text-align: left;
}

#docx-content h1 {
    font-size: 2em;
    letter-spacing: -0.02em;
    border-bottom: 2px solid var(--tk-accent-soft);
    padding-bottom: 0.5em;
}

#docx-content h2 {
    font-size: 1.6em;
    letter-spacing: -0.01em;
}

#docx-content h3 {
    font-size: 1.35em;
}

#docx-content h4 {
    font-size: 1.15em;
}

#docx-content img {
    max-width: 100% !important;
    height: auto !important;
    border-radius: var(--tk-radius-md);
    margin: 1.5em 0;
    display: block;
    box-shadow: var(--tk-shadow-md);
}

#docx-content blockquote {
    margin: 1.5em 0;
    padding: 1em 1.5em;
    border-left: 4px solid var(--tk-accent);
    background: var(--tk-accent-soft);
    border-radius: 0 var(--tk-radius-sm) var(--tk-radius-sm) 0;
    font-style: italic;
    color: var(--tk-text-muted);
}

#docx-content pre,
#docx-content code {
    font-family: var(--tk-font-mono);
    font-size: 0.9em;
    background: var(--tk-bg-secondary);
    border-radius: var(--tk-radius-sm);
}

#docx-content code {
    padding: 2px 6px;
}

#docx-content pre {
    padding: 16px;
    overflow-x: auto;
    margin: 1.5em 0;
}

#docx-content pre code {
    padding: 0;
    background: transparent;
}

#docx-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 0.9em;
    border-radius: var(--tk-radius-md);
    overflow: hidden;
}

#docx-content table td,
#docx-content table th {
    border: 1px solid var(--tk-card-border);
    padding: 12px 16px;
    text-align: left;
}

#docx-content table th {
    background: var(--tk-bg-secondary);
    font-weight: 600;
}

#docx-content table tr:hover td {
    background: var(--tk-card-hover);
}

#docx-content a {
    color: var(--tk-accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--tk-transition-fast);
}

#docx-content a:hover {
    border-bottom-color: var(--tk-accent);
}

#docx-content ul,
#docx-content ol {
    margin: 1em 0;
    padding-left: 1.5em;
}

#docx-content li {
    margin-bottom: 0.5em;
}

/* Margin classes */
#docx-content.margin-narrow {
    max-width: 900px;
    padding: 40px 48px;
}

#docx-content.margin-normal {
    max-width: 720px;
}

#docx-content.margin-wide {
    max-width: 560px;
    padding: 56px 64px;
}

/* Two-page spread mode for desktop */
@media (min-width: 1400px) {
    #docx-reader.two-page-mode {
        padding: 32px;
    }
    
    #docx-reader.two-page-mode #docx-content {
        max-width: 1200px;
        column-count: 2;
        column-gap: 64px;
        column-rule: 1px solid var(--tk-card-border);
    }
}

/* PDF Reader */
#pdf-reader {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 100%;
    background: var(--tk-bg-secondary);
}

.pdf-canvas-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    overflow: auto;
    padding: 24px;
}

#pdf-canvas {
    box-shadow: var(--tk-shadow-lg);
    border-radius: var(--tk-radius-sm);
    max-width: 100%;
    height: auto;
    transition: transform var(--tk-transition);
}

/* Page flip animation */
#pdf-canvas.flipping {
    animation: page-flip 0.4s ease-out;
}

@keyframes page-flip {
    0% { transform: perspective(1200px) rotateY(0deg); opacity: 1; }
    50% { transform: perspective(1200px) rotateY(-90deg); opacity: 0.5; }
    100% { transform: perspective(1200px) rotateY(0deg); opacity: 1; }
}

/* PDF Dark Mode Invert */
[data-theme="dark"] #pdf-canvas,
[data-theme="midnight"] #pdf-canvas,
[data-theme="forest"] #pdf-canvas {
    filter: invert(0.88) hue-rotate(180deg);
}

/* PDF navigation arrows */
.pdf-nav-area {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--tk-text-muted);
    background: var(--tk-card-bg);
    border: 1px solid var(--tk-card-border);
    border-radius: 50%;
    opacity: 0.6;
    transition: all var(--tk-transition);
    flex-shrink: 0;
    margin: 0 16px;
    box-shadow: var(--tk-shadow-sm);
}

.pdf-nav-area:hover {
    opacity: 1;
    color: var(--tk-accent);
    border-color: var(--tk-accent);
    transform: scale(1.05);
    box-shadow: var(--tk-shadow-md), var(--tk-glow);
}

.pdf-nav-area:active {
    transform: scale(0.98);
}
    flex-shrink: 0;
}

.pdf-nav-area:hover {
    opacity: 1;
    color: var(--tk-accent);
}

/* ================================================
   LOADING OVERLAY - Premium Animation
   ================================================ */
.reader-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--tk-bg);
    z-index: 200;
    transition: opacity 0.5s ease;
}

.reader-loading.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 56px;
    height: 56px;
    border: 3px solid var(--tk-progress-track);
    border-top-color: var(--tk-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    position: relative;
}

.loading-spinner::before {
    content: '';
    position: absolute;
    inset: 6px;
    border: 3px solid transparent;
    border-bottom-color: var(--tk-accent);
    border-radius: 50%;
    animation: spin 1.2s linear reverse infinite;
    opacity: 0.5;
}

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

.loading-text {
    margin-top: 24px;
    font-size: 15px;
    color: var(--tk-text-muted);
    font-weight: 500;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.loading-progress {
    margin-top: 16px;
    width: 200px;
    height: 4px;
    background: var(--tk-progress-track);
    border-radius: 2px;
    overflow: hidden;
}

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

/* ================================================
   FOOTER PROGRESS BAR - Enhanced
   ================================================ */
.reader-footer {
    height: var(--tk-footer-height);
    padding: 0 24px;
    background: var(--tk-toolbar-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-top: 1px solid var(--tk-toolbar-border);
    display: flex;
    align-items: center;
    flex-shrink: 0;
    z-index: 100;
    transition: 
        background var(--tk-transition), 
        border-color var(--tk-transition),
        transform var(--tk-transition),
        opacity var(--tk-transition);
    position: relative;
}

.progress-bar-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
}

.progress-bar-track {
    flex: 1;
    height: 6px;
    background: var(--tk-progress-track);
    border-radius: 3px;
    overflow: hidden;
    cursor: pointer;
    position: relative;
    transition: height var(--tk-transition-fast);
}

.progress-bar-track:hover {
    height: 8px;
}

.progress-bar-fill {
    height: 100%;
    background: var(--tk-progress-fill);
    border-radius: 3px;
    transition: width 0.5s ease;
    min-width: 0;
    position: relative;
}

.progress-bar-fill::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 14px;
    height: 14px;
    background: var(--tk-accent);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
    opacity: 0;
    transition: opacity var(--tk-transition-fast);
}

.progress-bar-track:hover .progress-bar-fill::after {
    opacity: 1;
}

.progress-text {
    font-size: 13px;
    font-weight: 600;
    color: var(--tk-text);
    min-width: 44px;
    text-align: right;
}

.reading-time-estimate {
    font-size: 12px;
    color: var(--tk-text-muted);
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
}

.reading-time-estimate svg {
    width: 14px;
    height: 14px;
}

/* ================================================
   SETTINGS PANEL - Premium Glass
   ================================================ */
.settings-panel {
    position: absolute;
    top: calc(var(--tk-toolbar-height) + 8px);
    right: 20px;
    width: 360px;
    background: var(--tk-card-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-xl);
    box-shadow: var(--tk-shadow-xl);
    z-index: 500;
    overflow: hidden;
    animation: panel-slide-in 0.3s var(--tk-spring);
}

@keyframes panel-slide-in {
    from {
        opacity: 0;
        transform: translateY(-12px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.settings-panel.hidden {
    display: none;
}

.settings-inner {
    padding: 24px;
}

.settings-inner h3 {
    margin: 0 0 24px;
    font-size: 18px;
    font-weight: 700;
    color: var(--tk-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-inner h3::before {
    content: '⚙️';
    font-size: 20px;
}

.settings-group {
    margin-bottom: 24px;
}

.settings-group:last-child {
    margin-bottom: 0;
}

.settings-group label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--tk-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 10px;
}

/* Theme Switcher - Premium Grid */
.theme-switcher {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.theme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 14px 8px;
    background: transparent;
    border: 2px solid var(--tk-card-border);
    border-radius: var(--tk-radius-md);
    cursor: pointer;
    font-size: 11px;
    font-weight: 600;
    color: var(--tk-text-muted);
    transition: all var(--tk-transition-fast);
    font-family: var(--tk-font-ui);
    position: relative;
    overflow: hidden;
}

.theme-option::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--tk-gradient-primary);
    opacity: 0;
    transition: opacity var(--tk-transition-fast);
}

.theme-option:hover {
    border-color: var(--tk-accent);
    transform: translateY(-2px);
}

.theme-option:hover::before {
    opacity: 0.05;
}

.theme-option.active {
    border-color: var(--tk-accent);
    color: var(--tk-accent);
    box-shadow: var(--tk-glow);
}

.theme-option.active::before {
    opacity: 0.08;
}

.theme-option.active::after {
    content: '✓';
    position: absolute;
    top: 6px;
    right: 6px;
    width: 18px;
    height: 18px;
    background: var(--tk-accent);
    color: white;
    border-radius: 50%;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-preview {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
    box-shadow: var(--tk-shadow-sm);
}

.daylight-preview { background: linear-gradient(135deg, #ffffff 50%, #f0f0f0 50%); }
.dark-preview { background: linear-gradient(135deg, #0a0a0b 50%, #1a1a1d 50%); }
.sepia-preview { background: linear-gradient(135deg, #f8f1e3 50%, #e8dcc9 50%); }
.midnight-preview { background: linear-gradient(135deg, #0c1220 50%, #1e293b 50%); }
.paper-preview { background: linear-gradient(135deg, #f5f0e6 50%, #e5ddd0 50%); }
.forest-preview { background: linear-gradient(135deg, #0f1910 50%, #1a2b1c 50%); }

/* Font Family Select */
.settings-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--tk-input-bg);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-md);
    color: var(--tk-text);
    font-size: 14px;
    cursor: pointer;
    font-family: var(--tk-font-ui);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    transition: all var(--tk-transition-fast);
}

.settings-group select:hover {
    border-color: var(--tk-accent);
}

.settings-group select:focus {
    outline: none;
    border-color: var(--tk-accent);
    background-color: var(--tk-input-focus);
    box-shadow: 0 0 0 3px var(--tk-accent-soft);
}

/* Font Size Control */
.font-size-control {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    background: var(--tk-input-bg);
    padding: 8px;
    border-radius: var(--tk-radius-md);
}

.font-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--tk-card-bg);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-sm);
    color: var(--tk-text);
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--tk-transition-fast);
    font-family: var(--tk-font-ui);
}

.font-btn:hover {
    background: var(--tk-accent);
    color: #fff;
    border-color: var(--tk-accent);
    transform: scale(1.05);
}

.font-btn:active {
    transform: scale(0.98);
}

#font-size-display,
#spacing-display {
    font-size: 16px;
    font-weight: 700;
    color: var(--tk-text);
    min-width: 56px;
    text-align: center;
}

/* Margin Control */
.margin-control {
    display: flex;
    gap: 8px;
    background: var(--tk-input-bg);
    padding: 6px;
    border-radius: var(--tk-radius-md);
}

.margin-btn {
    flex: 1;
    padding: 10px;
    background: transparent;
    border: none;
    border-radius: var(--tk-radius-sm);
    color: var(--tk-text-muted);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--tk-transition-fast);
    font-family: var(--tk-font-ui);
}

.margin-btn:hover {
    color: var(--tk-text);
    background: var(--tk-card-hover);
}

.margin-btn.active {
    background: var(--tk-card-bg);
    color: var(--tk-accent);
    box-shadow: var(--tk-shadow-sm);
}

/* ================================================
   SEARCH PANEL - Premium Glass
   ================================================ */
.search-panel {
    position: absolute;
    top: calc(var(--tk-toolbar-height) + 8px);
    left: 50%;
    transform: translateX(-50%);
    width: 560px;
    max-width: calc(100% - 40px);
    background: var(--tk-card-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-xl);
    box-shadow: var(--tk-shadow-xl);
    z-index: 500;
    overflow: hidden;
    animation: panel-slide-in 0.3s var(--tk-spring);
}

.search-panel.hidden {
    display: none;
}

.search-inner {
    display: flex;
    align-items: center;
    padding: 6px 12px 6px 20px;
    border-bottom: 1px solid var(--tk-card-border);
    gap: 12px;
}

.search-inner::before {
    content: '';
    width: 20px;
    height: 20px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='M21 21l-4.35-4.35'/%3E%3C/svg%3E");
    flex-shrink: 0;
    opacity: 0.6;
}

.search-inner input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--tk-text);
    font-size: 16px;
    padding: 14px 0;
    outline: none;
    font-family: var(--tk-font-ui);
}

.search-inner input::placeholder {
    color: var(--tk-text-subtle);
}

.search-close-btn {
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    color: var(--tk-text-muted);
    cursor: pointer;
    font-size: 18px;
    border-radius: var(--tk-radius-sm);
    transition: all var(--tk-transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-close-btn:hover {
    background: var(--tk-danger);
    color: white;
}

.search-results {
    max-height: 360px;
    overflow-y: auto;
    padding: 12px;
    scrollbar-width: thin;
    scrollbar-color: var(--tk-accent-soft) transparent;
}

.search-results-header {
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--tk-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.search-result-item {
    padding: 14px 16px;
    border-radius: var(--tk-radius-md);
    cursor: pointer;
    font-size: 14px;
    line-height: 1.6;
    color: var(--tk-text);
    transition: all var(--tk-transition-fast);
    border: 1px solid transparent;
    margin-bottom: 4px;
}

.search-result-item:hover {
    background: var(--tk-card-hover);
    border-color: var(--tk-card-border);
}

.search-result-item:active {
    transform: scale(0.99);
}

.search-result-item mark {
    background: rgba(250, 204, 21, 0.4);
    color: inherit;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}

.search-no-results {
    text-align: center;
    padding: 32px 16px;
    color: var(--tk-text-muted);
}

.search-no-results-icon {
    font-size: 40px;
    margin-bottom: 12px;
    opacity: 0.5;
}

/* ================================================
   HIGHLIGHT TOOLTIP - Premium Floating
   ================================================ */
.highlight-tooltip {
    position: fixed;
    background: var(--tk-card-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-lg);
    padding: 10px 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--tk-shadow-lg);
    z-index: 600;
    animation: tooltip-pop 0.25s var(--tk-spring);
}

@keyframes tooltip-pop {
    from {
        opacity: 0;
        transform: scale(0.85) translateY(8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.highlight-tooltip.hidden {
    display: none;
}

/* Arrow pointing down */
.highlight-tooltip::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: var(--tk-card-bg);
    border-bottom: none;
}

.hl-btn {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: var(--tk-radius-sm);
    transition: all var(--tk-transition-fast);
    padding: 0;
    font-size: 14px;
}

.hl-btn:hover {
    transform: scale(1.15);
}

.hl-btn:active {
    transform: scale(1.05);
}

.hl-btn span {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: block;
    border: 2px solid rgba(0, 0, 0, 0.15);
    box-shadow: inset 0 -2px 4px rgba(0, 0, 0, 0.1);
    transition: all var(--tk-transition-fast);
}

.hl-btn:hover span {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hl-divider {
    width: 1px;
    height: 24px;
    background: var(--tk-card-border);
    margin: 0 4px;
}

.hl-note-btn {
    font-size: 16px;
}

.hl-note-btn:hover {
    background: var(--tk-accent-soft);
}

/* ================================================
   NOTE MODAL - Premium Glassmorphism
   ================================================ */
.note-modal {
    position: fixed;
    inset: 0;
    background: var(--tk-overlay);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 700;
    animation: modal-fade 0.3s ease;
}

@keyframes modal-fade {
    from { opacity: 0; }
    to { opacity: 1; }
}

.note-modal.hidden {
    display: none;
}

.note-modal-content {
    background: var(--tk-card-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-xl);
    padding: 28px;
    width: 440px;
    max-width: calc(100% - 40px);
    box-shadow: var(--tk-shadow-xl);
    animation: modal-scale 0.3s var(--tk-spring);
}

@keyframes modal-scale {
    from { 
        opacity: 0;
        transform: scale(0.9) translateY(20px); 
    }
    to { 
        opacity: 1;
        transform: scale(1) translateY(0); 
    }
}

.note-modal-content h4 {
    margin: 0 0 20px;
    font-size: 20px;
    font-weight: 700;
    color: var(--tk-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.note-modal-content h4::before {
    content: '📝';
    font-size: 22px;
}

.note-modal-content textarea {
    width: 100%;
    padding: 16px;
    background: var(--tk-input-bg);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-md);
    color: var(--tk-text);
    font-size: 15px;
    font-family: var(--tk-font-ui);
    line-height: 1.6;
    resize: vertical;
    outline: none;
    box-sizing: border-box;
    min-height: 120px;
    transition: all var(--tk-transition-fast);
}

.note-modal-content textarea::placeholder {
    color: var(--tk-text-subtle);
}

.note-modal-content textarea:focus {
    border-color: var(--tk-accent);
    background: var(--tk-input-focus);
    box-shadow: 0 0 0 3px var(--tk-accent-soft);
}

.note-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 20px;
}

.note-btn {
    padding: 12px 24px;
    border-radius: var(--tk-radius-md);
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--tk-font-ui);
    transition: all var(--tk-transition-fast);
}

.note-cancel {
    background: var(--tk-input-bg);
    color: var(--tk-text-muted);
}

.note-cancel:hover {
    background: var(--tk-card-hover);
    color: var(--tk-text);
}

.note-save {
    background: var(--tk-gradient-primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.note-save:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.note-save:active {
    transform: translateY(0);
}

/* ================================================
   HIGHLIGHTS IN CONTENT
   ================================================ */
.texmeta-hl {
    border-radius: 3px;
    cursor: pointer;
    transition: all var(--tk-transition-fast);
    padding: 1px 2px;
    margin: -1px -2px;
    position: relative;
}

.texmeta-hl:hover {
    filter: brightness(0.92);
}

.texmeta-hl.has-note::after {
    content: '📝';
    font-size: 10px;
    position: absolute;
    top: -8px;
    right: -4px;
}

.texmeta-hl-yellow {
    background: rgba(253, 230, 138, 0.65);
    box-shadow: 0 1px 0 rgba(253, 230, 138, 0.8);
}

.texmeta-hl-green {
    background: rgba(134, 239, 172, 0.55);
    box-shadow: 0 1px 0 rgba(134, 239, 172, 0.8);
}

.texmeta-hl-pink {
    background: rgba(253, 164, 175, 0.55);
    box-shadow: 0 1px 0 rgba(253, 164, 175, 0.8);
}

.texmeta-hl-blue {
    background: rgba(147, 197, 253, 0.55);
    box-shadow: 0 1px 0 rgba(147, 197, 253, 0.8);
}

.texmeta-hl-orange {
    background: rgba(253, 186, 116, 0.55);
    box-shadow: 0 1px 0 rgba(253, 186, 116, 0.8);
}

.texmeta-hl-purple {
    background: rgba(196, 181, 253, 0.55);
    box-shadow: 0 1px 0 rgba(196, 181, 253, 0.8);
}

/* ================================================
   TABLE OF CONTENTS PANEL
   ================================================ */
.toc-panel {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: var(--tk-sidebar-width);
    background: var(--tk-sidebar-bg);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--tk-sidebar-border);
    transform: translateX(100%);
    transition: transform var(--tk-spring);
    z-index: 85;
    display: flex;
    flex-direction: column;
}

.toc-panel.open {
    transform: translateX(0);
}

.toc-header {
    padding: 20px;
    border-bottom: 1px solid var(--tk-sidebar-border);
}

.toc-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toc-header h3::before {
    content: '📑';
}

.toc-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.toc-item {
    padding: 12px 16px;
    border-radius: var(--tk-radius-sm);
    cursor: pointer;
    font-size: 14px;
    color: var(--tk-text);
    transition: all var(--tk-transition-fast);
    border-left: 3px solid transparent;
    margin-bottom: 4px;
}

.toc-item:hover {
    background: var(--tk-card-hover);
    border-left-color: var(--tk-accent);
}

.toc-item.active {
    background: var(--tk-accent-soft);
    border-left-color: var(--tk-accent);
    color: var(--tk-accent);
    font-weight: 600;
}

.toc-item-h1 { padding-left: 16px; font-weight: 600; }
.toc-item-h2 { padding-left: 32px; }
.toc-item-h3 { padding-left: 48px; font-size: 13px; }
.toc-item-h4 { padding-left: 64px; font-size: 12px; color: var(--tk-text-muted); }

/* ================================================
   READING STATS OVERLAY
   ================================================ */
.reading-stats-overlay {
    position: fixed;
    bottom: calc(var(--tk-footer-height) + 20px);
    right: 24px;
    background: var(--tk-card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--tk-card-border);
    border-radius: var(--tk-radius-lg);
    padding: 20px 24px;
    box-shadow: var(--tk-shadow-lg);
    z-index: 80;
    min-width: 240px;
    animation: stats-slide-in 0.3s var(--tk-spring);
}

@keyframes stats-slide-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reading-stats-overlay.hidden {
    display: none;
}

.reading-stats-header {
    font-size: 12px;
    font-weight: 600;
    color: var(--tk-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.reading-stats-header::before {
    content: '📊';
}

.reading-stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--tk-card-border);
}

.reading-stat-row:last-child {
    border-bottom: none;
}

.reading-stat-label {
    font-size: 13px;
    color: var(--tk-text-muted);
}

.reading-stat-value {
    font-size: 15px;
    font-weight: 700;
    color: var(--tk-accent);
}

/* ================================================
   AUTO-SCROLL INDICATOR
   ================================================ */
.auto-scroll-indicator {
    position: fixed;
    bottom: calc(var(--tk-footer-height) + 20px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--tk-accent);
    color: white;
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--tk-shadow-md), var(--tk-glow);
    z-index: 80;
    animation: pulse 2s ease-in-out infinite;
}

.auto-scroll-indicator.hidden {
    display: none;
}

.auto-scroll-indicator svg {
    animation: bounce 1s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.auto-scroll-speed {
    background: rgba(255,255,255,0.2);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
}

/* ================================================
   MOBILE RESPONSIVE - Ultra Premium
   ================================================ */
@media (max-width: 768px) {
    :root {
        --tk-sidebar-width: 100%;
        --tk-content-max-width: 100%;
        --tk-toolbar-height: 52px;
        --tk-footer-height: 38px;
    }

    .toolbar-book-title {
        max-width: 140px;
        font-size: 14px;
    }

    .toolbar-book-author {
        display: none;
    }

    .toolbar-center {
        display: none;
    }
    
    .toolbar-btn {
        width: 36px;
        height: 36px;
    }
    
    .toolbar-btn[title]::after {
        display: none;
    }

    .reader-sidebar {
        width: 100%;
        border-radius: var(--tk-radius-lg) var(--tk-radius-lg) 0 0;
        bottom: 0;
        top: auto;
        max-height: 70vh;
        transform: translateY(100%);
    }
    
    .reader-sidebar.open {
        transform: translateY(0);
    }

    .settings-panel,
    .search-panel {
        right: 8px;
        left: 8px;
        width: auto;
        transform: none;
        top: calc(var(--tk-toolbar-height) + 4px);
        border-radius: var(--tk-radius-lg);
    }
    
    .theme-switcher {
        grid-template-columns: repeat(3, 1fr);
    }

    #docx-reader {
        padding: 24px 16px 48px;
    }
    
    #docx-content {
        padding: 24px 20px;
        border-radius: 0;
        box-shadow: none;
    }
    
    #docx-content::before {
        display: none;
    }
    
    #docx-content > p:first-of-type::first-letter {
        font-size: 2.5em;
    }

    .pdf-nav-area {
        width: 48px;
        height: 48px;
        margin: 0 8px;
    }
    
    .reading-stats-overlay {
        bottom: calc(var(--tk-footer-height) + 12px);
        right: 12px;
        left: 12px;
        min-width: auto;
    }
    
    .auto-scroll-indicator {
        bottom: calc(var(--tk-footer-height) + 12px);
        padding: 8px 16px;
        font-size: 12px;
    }
    
    .toc-panel {
        width: 100%;
        border-radius: var(--tk-radius-lg) var(--tk-radius-lg) 0 0;
        border-left: none;
        border-top: 1px solid var(--tk-sidebar-border);
        max-height: 70vh;
    }
}

/* Tablet adjustments */
@media (min-width: 769px) and (max-width: 1024px) {
    :root {
        --tk-sidebar-width: 300px;
        --tk-content-max-width: 680px;
    }
    
    .theme-switcher {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Large desktop - two page spread */
@media (min-width: 1600px) {
    :root {
        --tk-content-max-width: 800px;
    }
    
    #docx-content {
        padding: 56px 72px;
    }
}

/* ================================================
   PRINT STYLES (Disabled for DRM)
   ================================================ */
@media print {
    #texmeta-reader-app {
        display: none !important;
    }
    
    body::after {
        content: 'Printing is disabled for copyright protection.';
        display: block;
        text-align: center;
        padding: 100px;
        font-size: 24px;
    }
}

/* ================================================
   REDUCED MOTION
   ================================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ================================================
   HIGH CONTRAST MODE
   ================================================ */
@media (prefers-contrast: high) {
    [data-theme="daylight"] {
        --tk-text: #000000;
        --tk-bg: #ffffff;
        --tk-card-border: #000000;
    }
    
    [data-theme="dark"] {
        --tk-text: #ffffff;
        --tk-bg: #000000;
        --tk-card-border: #ffffff;
    }
}

/* ================================================
   FOCUS VISIBLE FOR ACCESSIBILITY
   ================================================ */
.toolbar-btn:focus-visible,
.sidebar-tab:focus-visible,
.theme-option:focus-visible,
.font-btn:focus-visible,
.margin-btn:focus-visible,
.note-btn:focus-visible,
.hl-btn:focus-visible {
    outline: 2px solid var(--tk-accent);
    outline-offset: 2px;
}

/* ================================================
   ADMIN CSS (DASHBOARD)
   ================================================ */
.texmeta-admin-wrap {
    font-family: var(--tk-font-ui);
}

.texmeta-analytics-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0 30px;
}

.analytics-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: var(--tk-radius-lg);
    padding: 24px;
    text-align: center;
    transition: all 0.2s ease;
}

.analytics-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.analytics-card h3 {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.analytics-card p {
    font-size: 14px;
    color: #6b7280;
    margin: 8px 0 0;
    font-weight: 500;
}