/* Material Design CSS для Book Reader */

:root {
    /* Цветовая палитра */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --accent-color: #FF4081;
    --background-color: #FAFAFA;
    --surface-color: #FFFFFF;
    --text-primary: #212121;
    --text-secondary: #757575;
    --divider-color: #BDBDBD;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-elevated: 0 4px 8px rgba(0,0,0,0.15);
    
    /* Размеры */
    --header-height: 56px;
    --border-radius: 8px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

/* Темные темы */
[data-theme="dark"] {
    --background-color: #121212;
    --surface-color: #1E1E1E;
    --text-primary: #FFFFFF;
    --text-secondary: #B0B0B0;
    --divider-color: #333333;
    --primary-color: #2D2D2D;
    --accent-color: #4A4A4A;
}

[data-theme="black"] {
    --background-color: #000000;
    --surface-color: #111111;
    --text-primary: #FFFFFF;
    --text-secondary: #888888;
    --divider-color: #222222;
    --primary-color: #1A1A1A;
    --accent-color: #333333;
}

[data-theme="sepia"] {
    --background-color: #F4F1EA;
    --surface-color: #FDF6E3;
    --text-primary: #212121;
    --text-secondary: #8B7355;
    --divider-color: #D4C4A8;
    --primary-color: #8B6F47;
    --accent-color: #A68B5B;
}

[data-theme="blue"] {
    --background-color: #E3F2FD;
    --surface-color: #F3F9FF;
    --text-primary: #212121; /* Changed to black */
    --text-secondary: #1565C0;
    --divider-color: #90CAF9;
    --primary-color: #1976D2;
    --accent-color: #2196F3;
}

[data-theme="green"] {
    --background-color: #E8F5E8;
    --surface-color: #F1F8E9;
    --text-primary: #212121;
    --text-secondary: #2E7D32;
    --divider-color: #A5D6A7;
    --primary-color: #2E7D32;
    --accent-color: #4CAF50;
}

/* Базовые стили */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
}

h2 {
    margin: 0 auto;
}

#restTime {
    display: block;
    margin: 0 auto;
    font-size: 35px;
}

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
}

/* Заголовок приложения */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--primary-color);
    color: white;
    z-index: 1000;
    box-shadow: var(--shadow-elevated);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--spacing-md);
}

/* Убираем header-left, теперь есть кнопка домой */

.header-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.app-title {
    font-size: 20px;
    font-weight: 500;
    flex: 1;
    text-align: center;
    margin: 0 var(--spacing-md);
}

.icon-btn {
    background: none;
    border: none;
    color: inherit;
    font-size: 20px;
    padding: var(--spacing-sm);
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.icon-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.icon-btn:active {
    background-color: rgba(255, 255, 255, 0.2);
}

#chaptersBtn {
    display: none;
}

#homeBtn {
    display: none;
}

/* Боковое меню */
.side-menu {
    position: fixed;
    top: 0;
    left: -300px;
    width: 300px;
    height: 100vh;
    background-color: var(--surface-color);
    z-index: 1001;
    transition: left 0.3s ease;
    box-shadow: var(--shadow-elevated);
    overflow-y: auto;
}

.side-menu.open {
    left: 0;
}

.menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--divider-color);
    background-color: var(--primary-color);
    color: white;
}

.menu-header h2 {
    font-size: 18px;
    font-weight: 500;
}

.menu-content {
    padding: var(--spacing-md);
}

.add-book-btn {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.add-book-btn:hover {
    background-color: var(--primary-color);
}

/* Основной контент */
.main-content {
    flex: 1;
    margin-top: var(--header-height);
    position: relative;
    padding-bottom: 20px; /* Adjusted for fixed footer */
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
    z-index: 1;
    background-color: var(--background-color);
}

.screen.active {
    opacity: 1;
    visibility: visible;
    display: flex;
    flex-direction: column;
    z-index: 2;
}

/* Библиотека */
.library-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-md);
}

.library-header h2 {
    font-size: 24px;
    font-weight: 400;
}

.fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: white;
    border: none;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-elevated);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fab:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
}

.fab-bottom {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: white;
    border: none;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-elevated);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.fab-bottom:hover {
    background-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
}

.library-content {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
    color: var(--divider-color);
}

.empty-state h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.empty-state p {
    margin-bottom: var(--spacing-xl);
    font-size: 16px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

/* Список книг */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-lg);
}

.book-card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.book-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated);
}

.book-cover {
    width: 100%;
    padding-top: 150%; /* Соотношение сторон 2:3 */
    position: relative;
    background-color: var(--divider-color);
    overflow: hidden;
}

.book-cover img, .book-cover .default-cover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-cover .default-cover {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    font-size: 48px;
}

.book-info-on-cover {
    position: absolute;
    bottom: 0; /* Над полосой прогресса */
    left: 0;
    right: 0;
    padding: 60px 10px 10px 10px;
    color: white;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.7) 50%, rgba(0,0,0,0) 100%);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.7);
}

.book-info-on-cover .book-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-info-on-cover .book-author {
    font-size: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-format-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: rgba(0,0,0,0.6);
    color: white;
    font-size: 10px;
    font-weight: 500;
    padding: 2px 6px;
    border-radius: 4px;
    z-index: 3;
}

.book-progress {
    display: none;
}

.book-progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
    z-index: 1;
}

.book-progress-text {
    position: absolute;
    top: 8px;
    left: 8px;
    background-color: rgba(0,0,0,0.6);
    padding: 2px 6px;
    border-radius: 4px;
    width: auto;
    text-align: left;
    z-index: 2;
    color: white;
    font-size: 10px;
    font-weight: 500;
    text-shadow: 1px 1px 1px rgba(0,0,0,0.7);
}

/* Экран чтения */
.reader-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--divider-color);
    position: sticky;
    top: var(--header-height);
    z-index: 100;
}

.reader-header .book-info {
    flex: 1;
    margin: 0 var(--spacing-md);
}

.reader-header .book-info h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 2px;
}

.reader-header .book-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

.reader-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* Стили для хедера экрана чтения */
.reader-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--divider-color);
    position: sticky;
    top: var(--header-height);
    z-index: 100;
}

.reader-header .book-info {
    flex: 1;
    margin: 0 var(--spacing-md);
    text-align: center;
}

.reader-header .book-info h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.reader-header .book-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

.reader-content {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: var(--spacing-lg);
    will-change: scroll-position;
    transform: translateZ(0);
}

.book-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-primary);
    min-height: 100%;
    padding-bottom: 0;
    /* НЕ ставьте user-select: none */
}

.chapter-content {
    margin-top: var(--spacing-lg);
}

/* Кнопка следующей главы */
.next-chapter-section {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 1px solid var(--divider-color);
}

.next-chapter-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow);
}

.next-chapter-btn:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated);
}

.next-chapter-btn:active {
    transform: translateY(0);
}

.next-chapter-btn i {
    font-size: 14px;
}

.book-content h1, .book-content h2, .book-content h3 {
    margin: var(--spacing-xl) 0 var(--spacing-lg) 0;
    color: var(--text-primary);
}

.book-content h1 {
    font-size: 28px;
    font-weight: 300;
}

.book-content h2 {
    font-size: 24px;
    font-weight: 400;
}

.book-content h3 {
    font-size: 20px;
    font-weight: 500;
}

.book-content p {
    margin-bottom: var(--spacing-lg);
    text-align: justify;
}

/* Модальные окна */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.open {
    opacity: 1;
    visibility: visible;
}

.main-content, .reader-content {
    padding-bottom: 0 !important;
}

.modal-content {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-elevated);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.open .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--divider-color);
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 500;
    margin: 0 auto;
}

.modal-body {
    padding: var(--spacing-lg);
    max-height: 60vh;
    overflow-y: auto;
}

/* Настройки */
.setting-group {
    margin-bottom: var(--spacing-xl);
}

.setting-group label {
    display: block;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.font-size-controls,
.line-height-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    background-color: var(--background-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}

.font-size-controls span,
.line-height-controls span {
    font-size: 16px;
    font-weight: 500;
    min-width: 60px;
    text-align: center;
    color: var(--text-primary);
}

/* Выбор темы */
.theme-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.theme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.theme-option:hover {
    background-color: var(--background-color);
}

.theme-option.selected {
    border-color: var(--primary-color);
    background-color: rgba(33, 150, 243, 0.1);
}

.theme-preview {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
    border: 2px solid var(--divider-color);
}

.light-preview {
    background: linear-gradient(135deg, #FFFFFF, #F5F5F5);
    border: 2px solid #2196F3;
}

.sepia-preview {
    background: linear-gradient(135deg, #F4F1EA, #8B6F47);
    border: 2px solid #A68B5B;
}

.dark-preview {
    background: linear-gradient(135deg, #121212, #2D2D2D);
    border: 2px solid #4A4A4A;
}

.black-preview {
    background: linear-gradient(135deg, #000000, #1A1A1A);
    border: 2px solid #333333;
}

.blue-preview {
    background: linear-gradient(135deg, #E3F2FD, #1976D2);
    border: 2px solid #2196F3;
}

.green-preview {
    background: linear-gradient(135deg, #E8F5E8, #2E7D32);
    border: 2px solid #4CAF50;
}

.theme-option span {
    font-size: 12px;
    text-align: center;
    color: var(--text-secondary);
}

/* Список глав */
.chapters-list {
    max-height: 400px;
    overflow-y: auto;
}

.chapter-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--divider-color);
    cursor: pointer;
    transition: background-color 0.2s;
}

.chapter-item:hover {
    background-color: var(--background-color);
}

.chapter-item:last-child {
    border-bottom: none;
}

.chapter-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.chapter-progress {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Главы в боковом меню */
.side-menu .chapters-list {
    max-height: calc(100vh - 120px);
}

.side-menu .chapter-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xs);
    border-bottom: none;
}

.side-menu .chapter-item:hover {
    background-color: var(--accent-color);
    color: white;
}

.side-menu .chapter-item:hover .chapter-title,
.side-menu .chapter-item:hover .chapter-progress {
    color: white;
}

.side-menu .chapter-item.current {
    background-color: var(--primary-color);
    color: white;
}

.side-menu .chapter-item.current .chapter-title,
.side-menu .chapter-item.current .chapter-progress {
    color: white;
}

/* Кнопки действий */
.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

.btn-secondary {
    background-color: var(--divider-color);
    color: var(--text-primary);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-secondary:hover {
    background-color: var(--text-secondary);
}

.btn-danger {
    background-color: #F44336;
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-danger:hover {
    background-color: #D32F2F;
}

/* Адаптивность */
@media (max-width: 768px) {
    .side-menu {
        width: 280px;
    }
    
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: var(--spacing-md);
    }
    
    .theme-options {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .modal-content {
        margin: var(--spacing-md);
        max-width: calc(100vw - 32px);
    }
}

@media (max-width: 480px) {
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .book-title {
        font-size: 14px;
    }
    
    .book-author {
        font-size: 12px;
    }
}

/* Анимации */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.book-card {
    animation: fadeIn 0.3s ease;
}

/* Скрытие скроллбара */
.reader-content::-webkit-scrollbar {
    width: 6px;
}

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

.reader-content::-webkit-scrollbar-thumb {
    background: var(--divider-color);
    border-radius: 3px;
}

.reader-content:hover::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
}
/* Reader Footer and Progress Bar */
.reader-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--surface-color);
    padding: 0 var(--spacing-lg);
    box-shadow: var(--shadow-elevated);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease-in-out;
    height: 20px;
}

.progress-info {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    font-size: 12px;
    color: var(--text-secondary);
}

#progressText {
    flex-shrink: 0;
}

#chapterInfo {
    flex-grow: 1;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#chapterPages {
    flex-shrink: 0;
}

.progress-bar,
.progress-fill {
    display: none;
}

body.modal-open {
    overflow: hidden;
}

#restModal .modal-body p {
    text-align: center;
}

@media (min-width: 320px) and (max-width: 575px) {
 .library-header {
    padding: 20px 0 0 0;
 }
}

#overlay {
    position: fixed;
    display: none;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: 1000;
}

#overlay.visible {
    display: block;
}
#overlay {
    position: fixed;
    display: none;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: 1000;
}

#overlay.visible {
    display: block;
}

/* Notification Toast */
.notification {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--surface-color);
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: 25px;
    box-shadow: var(--shadow-elevated);
    z-index: 3000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    font-size: 14px;
    font-weight: 500;
}

.notification.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%);
}

@media (max-width: 768px) {
    .notification {
        width: calc(100% - 32px);
        left: 16px;
        right: 16px;
        transform: translate(0, -50%);
        border-radius: 8px;
    }

    .notification.show {
        transform: translate(0, -50%);
    }
}