/* ========== EBOOK READER STYLES ========== */

/* Body Override for Reader */
.reader-body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    background: var(--light-gray);
}

/* ========== TOP NAVIGATION ========== */
.reader-nav {
    background: var(--white);
    border-bottom: 2px solid var(--light-gray);
    position: sticky;
    top: 0;
    z-index: 999;
    box-shadow: var(--shadow-sm);
}

.reader-nav-container {
    max-width: 100%;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.reader-back-btn {
    color: var(--primary-cyan);
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    transition: all 0.3s ease;
}

.reader-back-btn:hover {
    background: var(--gradient-primary);
    color: var(--white);
}

.reader-title-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.reader-title {
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.reader-subtitle {
    font-size: 0.8rem;
    color: #737373;
    font-weight: 400;
    margin-top: 2px;
}

.reader-controls {
    display: flex;
    gap: 8px;
}

.control-btn {
    background: var(--light-gray);
    border: none;
    padding: 10px 16px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.control-btn:hover {
    background: var(--gradient-primary);
    color: var(--white);
    transform: scale(1.05);
}

.mobile-only {
    display: none;
}

/* ========== MAIN LAYOUT ========== */
.reader-container {
    display: flex;
    min-height: calc(100vh - 70px);
    max-width: 1600px;
    margin: 0 auto;
}

/* ========== SIDEBAR ========== */
.reader-sidebar {
    width: 350px;
    background: var(--white);
    border-right: 2px solid var(--light-gray);
    height: calc(100vh - 70px);
    overflow-y: auto;
    position: sticky;
    top: 70px;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 2px solid var(--light-gray);
    background: var(--gradient-primary);
    color: var(--white);
}

.sidebar-header h3 {
    margin: 0 0 16px 0;
    font-size: 1.3rem;
}

.reading-progress {
    margin-top: 12px;
}

.progress-text {
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.progress-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-yellow);
    transition: width 0.3s ease;
    width: 0%;
}

.sidebar-content {
    flex-grow: 1;
    padding: 16px;
    overflow-y: auto;
}

/* TOC Sections */
.toc-section {
    margin-bottom: 16px;
}

.toc-part {
    margin-bottom: 8px;
}

.toc-part-header {
    width: 100%;
    background: var(--light-gray);
    border: none;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    color: var(--primary-cyan);
}

.toc-part-header:hover {
    background: var(--gradient-primary);
    color: var(--white);
}

.part-icon {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.toc-part-header.expanded .part-icon {
    transform: rotate(90deg);
}

.toc-part-chapters {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding-left: 16px;
}

.toc-part-chapters.expanded {
    max-height: 500px;
}

/* Chapter Buttons */
.toc-chapter {
    width: 100%;
    background: transparent;
    border: none;
    padding: 12px 16px;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    margin: 4px 0;
    position: relative;
}

.toc-chapter:hover {
    background: var(--light-gray);
}

.toc-chapter.active {
    background: var(--gradient-primary);
    color: var(--white);
    font-weight: 600;
}

.toc-chapter.free-chapter {
    background: #e6f9fb;
}

.toc-chapter.locked-chapter {
    opacity: 0.6;
}

.toc-chapter.locked-chapter:hover {
    opacity: 0.8;
    background: #fff8e1;
}

.chapter-icon {
    font-size: 1.2rem;
}

.chapter-name {
    flex-grow: 1;
    font-size: 0.95rem;
}

.free-tag {
    background: var(--accent-yellow);
    color: var(--dark-gray);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 700;
}

.lock-tag {
    font-size: 1rem;
}

.read-badge {
    font-size: 0.8rem;
}

.read-badge.read::after {
    content: '✓';
    color: #2ecc71;
    font-weight: 700;
}

/* Sidebar CTA */
.sidebar-cta {
    padding: 24px;
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
    border-top: 2px solid var(--light-gray);
}

.sidebar-cta p {
    margin: 8px 0;
    font-size: 0.95rem;
}

.unlock-btn {
    display: inline-block;
    margin-top: 12px;
    padding: 10px 20px;
    background: var(--white);
    color: var(--primary-pink);
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all 0.3s ease;
}

.unlock-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========== MAIN READING AREA ========== */
.reader-main {
    flex-grow: 1;
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

/* Breadcrumbs */
.breadcrumbs {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 24px;
}

.breadcrumbs a {
    color: var(--primary-cyan);
}

.breadcrumb-sep {
    margin: 0 8px;
    color: var(--text-gray);
}

/* Reading Stats */
.reading-stats {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    padding: 16px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.stat-item {
    font-size: 0.9rem;
    color: var(--text-gray);
}

.bookmark-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-left: auto;
}

.bookmark-btn:hover {
    color: var(--accent-yellow);
    transform: scale(1.1);
}

.bookmark-btn.bookmarked {
    color: var(--accent-yellow);
}

.download-btn {
    background: var(--gradient-primary);
    color: var(--white) !important;
    padding: 6px 12px;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    opacity: 0.9;
}

/* Chapter Content */
.chapter-content {
    background: var(--white);
    padding: 48px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    min-height: 600px;
    font-family: 'Bree Serif', Georgia, serif;
    line-height: 1.8;
    font-size: 1.1rem;
}

.chapter-content h1 {
    font-size: 2.5rem;
    color: var(--text-gray);
    margin-bottom: 16px;
    border-bottom: 3px solid var(--primary-cyan);
    padding-bottom: 16px;
}

.chapter-content h2 {
    font-size: 2rem;
    color: var(--text-gray);
    margin: 40px 0 20px;
    border-left: 4px solid var(--primary-pink);
    padding-left: 16px;
}

.chapter-content h3 {
    font-size: 1.5rem;
    color: var(--text-gray);
    margin: 32px 0 16px;
}

.chapter-content h4 {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin: 24px 0 12px;
}

.chapter-content p {
    margin: 16px 0;
    color: var(--dark-gray);
}

.chapter-content ul,
.chapter-content ol {
    margin: 16px 0;
    padding-left: 32px;
}

.chapter-content li {
    margin: 12px 0;
}

.chapter-content strong {
    color: var(--primary-pink);
}

/* Special Content Boxes */
.chapter-content .highlight,
.chapter-content .tip,
.chapter-content .warning,
.chapter-content .reflection,
.chapter-content .takeaway,
.chapter-content .script,
.chapter-content .do-list,
.chapter-content .dont-list {
    margin: 24px 0;
    padding: 20px;
    border-radius: var(--radius-md);
    border-left: 4px solid;
}

.chapter-content .highlight {
    background: #fff3cd;
    border-color: var(--accent-yellow);
}

.chapter-content .tip {
    background: #d1ecf1;
    border-color: var(--primary-cyan);
}

.chapter-content .warning {
    background: #f8d7da;
    border-color: var(--primary-pink);
}

.chapter-content .reflection {
    background: #e6f9fb;
    border-color: var(--primary-cyan);
}

.chapter-content .takeaway {
    background: #fff3cd;
    border-color: var(--accent-yellow);
    font-weight: 600;
}

.chapter-content .script {
    background: #f8f9fa;
    border-color: var(--text-gray);
    font-style: italic;
}

.chapter-content .do-list {
    background: #e6f9fb;
    border-color: var(--primary-cyan);
}

.chapter-content .dont-list {
    background: #fff8e1;
    border-color: var(--accent-yellow);
}

/* Loading State */
.loading-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-gray);
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    border: 4px solid var(--light-gray);
    border-top: 4px solid var(--primary-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Chapter Navigation */
.chapter-nav {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 48px;
}

.nav-btn {
    flex: 1;
    padding: 16px 32px;
    background: var(--light-gray);
    border: 2px solid var(--primary-cyan);
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: var(--primary-pink);
    transform: translateY(-2px);
}

.nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.nav-btn:disabled:hover {
    background: var(--light-gray);
    color: inherit;
    transform: none;
}

/* ========== LOCKED OVERLAY ========== */
.locked-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(5px);
}

.locked-overlay.hidden {
    display: none;
}

.locked-content {
    text-align: center;
    max-width: 500px;
    padding: 40px;
}

.locked-icon {
    font-size: 4rem;
    margin-bottom: 24px;
}

.locked-content h2 {
    font-size: 2rem;
    color: var(--primary-pink);
    margin-bottom: 16px;
}

.locked-content p {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 24px;
}

.unlock-benefits {
    text-align: left;
    background: var(--light-gray);
    padding: 24px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
}

.unlock-benefits h3 {
    font-size: 1.2rem;
    color: var(--primary-cyan);
    margin-bottom: 16px;
}

.unlock-benefits ul {
    list-style: none;
    padding: 0;
}

.unlock-benefits li {
    padding: 8px 0;
    font-size: 1rem;
}

.unlock-btn-large {
    display: inline-block;
    padding: 16px 40px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.unlock-btn-large:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.free-note {
    margin-top: 16px;
    font-size: 0.95rem;
    font-style: italic;
    color: var(--text-gray);
}

/* ========== BACK TO TOP BUTTON ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ========== FONT SIZE MENU ========== */
.font-menu {
    position: fixed;
    top: 70px;
    right: 20px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.font-menu.hidden {
    display: none;
}

.font-menu button {
    padding: 10px 20px;
    background: var(--light-gray);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
}

.font-menu button:hover {
    background: var(--gradient-primary);
    color: var(--white);
}

.font-menu button.active {
    background: var(--primary-cyan);
    color: var(--white);
}

/* Font Size Classes */
.reader-body.font-small .chapter-content {
    font-size: 0.95rem;
}

.reader-body.font-medium .chapter-content {
    font-size: 1.1rem;
}

.reader-body.font-large .chapter-content {
    font-size: 1.25rem;
}

.reader-body.font-xlarge .chapter-content {
    font-size: 1.4rem;
}

/* Night Mode */
.reader-body.night-mode {
    background: #1a1a1a;
}

.reader-body.night-mode .reader-nav,
.reader-body.night-mode .reader-sidebar,
.reader-body.night-mode .chapter-content,
.reader-body.night-mode .reading-stats {
    background: #2d2d2d;
    color: #e0e0e0;
}

.reader-body.night-mode .chapter-content h1,
.reader-body.night-mode .chapter-content h2,
.reader-body.night-mode .chapter-content h3,
.reader-body.night-mode .chapter-content h4 {
    color: #00B0BD;
}

.reader-body.night-mode .chapter-content p,
.reader-body.night-mode .chapter-content li {
    color: #d0d0d0;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .reader-sidebar {
        width: 300px;
    }
    
    .reader-main {
        padding: 24px;
    }
    
    .chapter-content {
        padding: 32px;
    }
}

@media (max-width: 768px) {
    .mobile-only {
        display: block;
    }
    
    .reader-sidebar {
        position: fixed;
        left: -350px;
        top: 70px;
        width: 300px;
        transition: left 0.3s ease;
        z-index: 998;
        box-shadow: var(--shadow-lg);
    }
    
    .reader-sidebar.visible {
        left: 0;
    }
    
    .reader-main {
        padding: 16px;
        width: 100%;
    }
    
    .chapter-content {
        padding: 24px;
        font-size: 1rem;
    }
    
    .chapter-nav {
        flex-direction: column;
    }
    
    .reading-stats {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

.hidden {
    display: none;
}