/* Основные стили для Telegram Mini App */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-hint-color: #999999;
    --tg-theme-link-color: #2481cc;
    --tg-theme-button-color: #2481cc;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f5f5f5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

#app {
    max-width: 100%;
    min-height: 100vh;
}

/* Экраны */
.screen {
    display: none;
    min-height: 100vh;
    padding: 20px;
    padding-bottom: 100px;
}

.screen.active {
    display: block;
}

/* Заголовки */
.header {
    text-align: center;
    padding: 20px 0;
    margin-bottom: 20px;
}

.header h1 {
    font-size: 24px;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--tg-theme-hint-color);
    font-size: 14px;
}

/* Область загрузки */
.upload-area {
    border: 2px dashed var(--tg-theme-hint-color);
    border-radius: 16px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 30px;
}

.upload-area:active {
    background-color: var(--tg-theme-secondary-bg-color);
    transform: scale(0.98);
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.upload-text {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
}

.upload-formats {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    margin-bottom: 12px;
}

.btn:active {
    transform: scale(0.96);
}

.btn-primary {
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}

.btn-secondary {
    background-color: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
}

.btn-nav {
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    flex: 1;
    margin: 0 5px;
}

.btn-icon {
    background: none;
    border: none;
    font-size: 24px;
    padding: 8px;
    cursor: pointer;
    color: var(--tg-theme-text-color);
}

/* Список книг */
.books-section {
    margin-top: 20px;
}

.books-section h2 {
    font-size: 18px;
    margin-bottom: 16px;
}

.books-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.book-item-wrapper {
    position: relative;
}

.book-item {
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: transform 0.2s ease;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.book-item:active {
    transform: scale(0.98);
}

/* Разные фоны для книг */
.book-item-wrapper:nth-child(6n+1) .book-item {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.book-item-wrapper:nth-child(6n+2) .book-item {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.book-item-wrapper:nth-child(6n+3) .book-item {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.book-item-wrapper:nth-child(6n+4) .book-item {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: white;
}

.book-item-wrapper:nth-child(6n+5) .book-item {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: white;
}

.book-item-wrapper:nth-child(6n+6) .book-item {
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
    color: white;
}

.book-item .book-title {
    color: white;
}

.book-item .book-author,
.book-item .book-meta {
    color: rgba(255, 255, 255, 0.85);
}

.book-item-wrapper.deleting {
    max-height: 0;
    margin-bottom: 0;
    opacity: 0;
    transition: all 0.3s ease;
    overflow: hidden;
}

.book-title {
    font-weight: 500;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 13px;
    color: var(--tg-theme-hint-color);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-meta {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
}

/* Прогресс */
.progress-container {
    text-align: center;
    padding: 40px 20px;
}

.book-info {
    margin-bottom: 30px;
}

.book-info h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.book-info p {
    color: var(--tg-theme-hint-color);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--tg-theme-secondary-bg-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}

.progress-fill {
    height: 100%;
    background-color: var(--tg-theme-button-color);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 16px;
    margin-bottom: 8px;
}

.progress-estimate {
    font-size: 14px;
    color: var(--tg-theme-hint-color);
}

/* Читалка */
.reader-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--tg-theme-secondary-bg-color);
}

.reader-title {
    text-align: center;
    flex: 1;
}

.reader-title h3 {
    font-size: 16px;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reader-title span {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
    cursor: pointer;
    user-select: none;
    transition: color 0.2s ease;
}

.reader-title span:hover {
    color: var(--tg-theme-button-color);
}

.reader-title span:active {
    transform: scale(0.95);
}

.reader-content {
    font-size: 18px;
    line-height: 1.8;
    padding: 0 10px;
    margin-bottom: 80px;
    min-height: 60vh;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    position: relative;
}

.reader-content p {
    margin-bottom: 16px;
    text-align: justify;
}

.loading-text {
    text-align: center;
    color: var(--tg-theme-hint-color);
    padding: 40px;
}

.reader-controls {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    padding: 16px 20px;
    background-color: var(--tg-theme-bg-color);
    border-top: 1px solid var(--tg-theme-secondary-bg-color);
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
}

/* Адаптивность для iPhone 11 */
@media (max-width: 414px) {
    .reader-content {
        font-size: 17px;
        line-height: 1.7;
    }
    
    .btn-nav {
        padding: 14px 20px;
    }
}

/* Скрытые элементы */
.hidden {
    display: none !important;
}

/* Анимации */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.screen.active {
    animation: fadeIn 0.3s ease;
}


/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--tg-theme-bg-color);
    border-radius: 16px;
    width: calc(100% - 40px);
    max-width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    margin: 0 20px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--tg-theme-secondary-bg-color);
}

.modal-header h3 {
    font-size: 18px;
    margin: 0;
}

.modal-body {
    padding: 20px;
}

.modal-body h4 {
    font-size: 14px;
    margin-bottom: 12px;
    color: var(--tg-theme-hint-color);
}

/* Модальное окно удаления */
.delete-modal .modal-content {
    max-width: 320px;
}

.delete-modal .modal-body {
    text-align: center;
}

.delete-modal .modal-body h3 {
    color: var(--tg-theme-text-color);
}

.delete-modal .book-title-confirm {
    font-size: 16px;
    font-weight: 500;
    margin: 16px 0 24px;
    color: var(--tg-theme-text-color);
}

.delete-modal .modal-buttons {
    display: flex;
    gap: 12px;
}

.delete-modal .modal-buttons .btn {
    flex: 1;
}

/* Выбор темы */
.theme-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.theme-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 12px;
    border: 2px solid transparent;
    border-radius: 12px;
    background-color: var(--tg-theme-secondary-bg-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.theme-btn.active {
    border-color: var(--tg-theme-button-color);
}

.theme-preview {
    width: 60px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.light-preview {
    background: linear-gradient(to bottom, #ffffff 50%, #f5f5f5 50%);
}

.sepia-preview {
    background: linear-gradient(to bottom, #f4ecd8 50%, #e8dcc0 50%);
}

.dark-preview {
    background: linear-gradient(to bottom, #2d2d2d 50%, #1a1a1a 50%);
}

.night-preview {
    background: linear-gradient(to bottom, #1a1a1a 50%, #000000 50%);
}

.theme-btn span {
    font-size: 13px;
    color: var(--tg-theme-text-color);
}

/* Темы для чтения */
body[data-theme="light"] {
    --reader-bg: #ffffff;
    --reader-text: #000000;
}

body[data-theme="sepia"] {
    --reader-bg: #f4ecd8;
    --reader-text: #5c4a2f;
}

body[data-theme="dark"] {
    --reader-bg: #2d2d2d;
    --reader-text: #e0e0e0;
}

body[data-theme="night"] {
    --reader-bg: #000000;
    --reader-text: #b0b0b0;
}

/* Применяем тему к читалке */
#reader-screen {
    background-color: var(--reader-bg, var(--tg-theme-bg-color));
}

#reader-screen .reader-content {
    background-color: var(--reader-bg, var(--tg-theme-bg-color));
    color: var(--reader-text, var(--tg-theme-text-color));
}

#reader-screen .reader-header {
    background-color: var(--reader-bg, var(--tg-theme-bg-color));
    color: var(--reader-text, var(--tg-theme-text-color));
}

#reader-screen .btn-icon {
    color: var(--reader-text, var(--tg-theme-text-color));
}

#reader-screen .reader-title h3,
#reader-screen .reader-title span {
    color: var(--reader-text, var(--tg-theme-text-color));
}

/* Модальное окно в теме читалки */
body[data-theme] .modal-content {
    background-color: var(--reader-bg);
}

body[data-theme] .modal-header {
    border-bottom-color: rgba(128, 128, 128, 0.2);
}

body[data-theme] .modal-header h3,
body[data-theme] .modal-body h3,
body[data-theme] .modal-body h4 {
    color: var(--reader-text);
}

body[data-theme] .book-title-confirm {
    color: var(--reader-text);
}

body[data-theme] .btn-icon {
    color: var(--reader-text);
}

body[data-theme] .theme-btn {
    background-color: rgba(128, 128, 128, 0.1);
}

body[data-theme] .theme-btn span {
    color: var(--reader-text);
}


/* Выбор шрифта */
.font-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 20px;
}

.font-btn {
    padding: 10px 16px;
    border: 2px solid transparent;
    border-radius: 8px;
    background-color: rgba(128, 128, 128, 0.1);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
}

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

.font-btn.active {
    border-color: var(--tg-theme-button-color);
    background-color: rgba(36, 129, 204, 0.1);
}

body[data-theme] .font-btn {
    color: var(--reader-text);
    background-color: rgba(128, 128, 128, 0.1);
}

/* Выбор размера шрифта */
.font-size-selector {
    display: flex;
    gap: 8px;
    justify-content: space-between;
}

.size-btn {
    flex: 1;
    padding: 12px;
    border: 2px solid transparent;
    border-radius: 8px;
    background-color: rgba(128, 128, 128, 0.1);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
}

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

.size-btn.active {
    border-color: var(--tg-theme-button-color);
    background-color: rgba(36, 129, 204, 0.1);
}

.size-btn[data-size="small"] {
    font-size: 14px;
}

.size-btn[data-size="medium"] {
    font-size: 18px;
}

.size-btn[data-size="large"] {
    font-size: 22px;
}

.size-btn[data-size="xlarge"] {
    font-size: 26px;
}

body[data-theme] .size-btn {
    color: var(--reader-text);
    background-color: rgba(128, 128, 128, 0.1);
}

/* Шрифты для чтения */
body[data-font="system"] .reader-content {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body[data-font="montserrat"] .reader-content {
    font-family: 'Montserrat', sans-serif;
}

body[data-font="opensans"] .reader-content {
    font-family: 'Open Sans', sans-serif;
}

body[data-font="roboto"] .reader-content {
    font-family: 'Roboto', sans-serif;
}

body[data-font="lora"] .reader-content {
    font-family: 'Lora', serif;
}

body[data-font="merriweather"] .reader-content {
    font-family: 'Merriweather', serif;
}

/* Размеры шрифта для чтения */
body[data-font-size="small"] .reader-content {
    font-size: 16px;
    line-height: 1.6;
}

body[data-font-size="medium"] .reader-content {
    font-size: 18px;
    line-height: 1.7;
}

body[data-font-size="large"] .reader-content {
    font-size: 20px;
    line-height: 1.8;
}

body[data-font-size="xlarge"] .reader-content {
    font-size: 22px;
    line-height: 1.9;
}