/* ===== 基础样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #667eea;
    --primary-dark: #5a6fd6;
    --secondary: #764ba2;
    --bg-dark: #1a1a2e;
    --bg-darker: #16213e;
    --bg-card: #0f3460;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --border-color: #2d3748;
    --success: #48bb78;
    --warning: #f6ad55;
    --danger: #fc8181;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding-bottom: 100px;
}

/* ===== 顶部导航 ===== */
.header {
    background: var(--bg-darker);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
}

.logo i {
    font-size: 28px;
}

.search-box {
    flex: 1;
    max-width: 500px;
    display: flex;
    border-radius: 25px;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}

.search-box input {
    flex: 1;
    padding: 10px 20px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 14px;
}

.search-box input:focus {
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box button {
    padding: 10px 20px;
    border: none;
    background: var(--gradient);
    color: white;
    cursor: pointer;
    transition: opacity 0.3s;
}

.search-box button:hover {
    opacity: 0.9;
}

.header-actions {
    display: flex;
    gap: 15px;
}

.btn-link {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s;
    font-size: 14px;
}

.btn-link:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.btn-link i {
    margin-right: 5px;
}

/* ===== 主内容区布局 ===== */
.main-content {
    max-width: 1400px;
    margin: 20px auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 200px 1fr 220px;
    gap: 20px;
    min-height: calc(100vh - 200px);
}

/* ===== 左侧分类栏 ===== */
.sidebar {
    background: var(--bg-darker);
    border-radius: 12px;
    padding: 20px;
    height: fit-content;
    position: sticky;
    top: 90px;
}

.sidebar h3 {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar h3 i {
    color: var(--primary);
}

.category-list {
    list-style: none;
}

.category-list li {
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 8px;
    margin-bottom: 5px;
    transition: all 0.3s;
    font-size: 14px;
    color: var(--text-secondary);
}

.category-list li:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.category-list li.active {
    background: var(--gradient);
    color: white;
}

/* ===== 中央内容区 ===== */
.content-area {
    min-width: 0;
}

.view {
    animation: fadeIn 0.3s ease;
}

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

.view-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.view-header h2 {
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.view-header h2 i {
    color: var(--primary);
}

.result-count {
    color: var(--text-muted);
    font-size: 14px;
}

/* ===== 书籍网格 ===== */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
}

.book-card {
    background: var(--bg-darker);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.book-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.book-cover {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--bg-card);
}

.book-info {
    padding: 12px;
}

.book-title {
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 5px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 12px;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-tags {
    display: flex;
    gap: 5px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.book-tag {
    font-size: 10px;
    padding: 2px 8px;
    background: var(--bg-card);
    border-radius: 10px;
    color: var(--text-secondary);
}

/* ===== 右侧边栏 ===== */
.right-sidebar {
    background: var(--bg-darker);
    border-radius: 12px;
    padding: 20px;
    height: fit-content;
    position: sticky;
    top: 90px;
}

.right-sidebar h3 {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.right-sidebar h3 i {
    color: var(--primary);
}

.recent-list {
    list-style: none;
    max-height: 400px;
    overflow-y: auto;
}

.recent-list li {
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--bg-card);
}

.recent-list li:hover {
    background: var(--primary);
}

.recent-item {
    display: flex;
    gap: 10px;
}

.recent-cover {
    width: 50px;
    height: 50px;
    border-radius: 6px;
    object-fit: cover;
    flex-shrink: 0;
}

.recent-info {
    flex: 1;
    min-width: 0;
}

.recent-title {
    font-size: 13px;
    font-weight: bold;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.recent-chapter {
    font-size: 11px;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.source-switch {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.source-switch select {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    margin-top: 10px;
}

.source-switch select:focus {
    outline: none;
    border-color: var(--primary);
}

/* ===== 书籍详情页 ===== */
.book-detail {
    background: var(--bg-darker);
    border-radius: 12px;
    overflow: hidden;
}

.book-detail-header {
    display: flex;
    gap: 30px;
    padding: 30px;
    background: linear-gradient(to bottom, var(--bg-card), var(--bg-darker));
}

.book-detail-cover {
    width: 180px;
    height: 240px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    flex-shrink: 0;
}

.book-detail-info {
    flex: 1;
}

.book-detail-title {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 10px;
}

.book-detail-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
    color: var(--text-secondary);
    font-size: 14px;
}

.book-detail-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.book-detail-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.book-detail-actions {
    display: flex;
    gap: 15px;
}

.btn-primary {
    padding: 12px 30px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    padding: 12px 25px;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-secondary:hover {
    border-color: var(--primary);
}

.book-chapters {
    padding: 20px 30px;
}

.book-chapters h3 {
    font-size: 18px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chapter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.chapter-item {
    padding: 12px 15px;
    background: var(--bg-card);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.chapter-item.playing {
    background: var(--primary);
}

.chapter-item i {
    color: var(--text-muted);
    font-size: 12px;
}

.chapter-item.playing i {
    color: white;
}

/* ===== 底部播放器 ===== */
.player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    z-index: 1000;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.player.show {
    transform: translateY(0);
}

.player-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 15px 20px;
    display: grid;
    grid-template-columns: 250px 1fr 200px;
    gap: 20px;
    align-items: center;
}

.player-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.player-cover {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-card);
    flex-shrink: 0;
}

.player-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.player-text {
    min-width: 0;
}

.player-title {
    font-size: 14px;
    font-weight: bold;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.player-author {
    font-size: 12px;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 播放控制 */
.player-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.control-buttons {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-control {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s;
}

.btn-control:hover {
    color: var(--text-primary);
    background: var(--bg-card);
}

.btn-play {
    width: 50px;
    height: 50px;
    background: var(--gradient) !important;
    color: white !important;
    font-size: 20px;
}

.btn-play:hover {
    transform: scale(1.1);
}

.progress-area {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
}

.time-current, .time-total {
    font-size: 12px;
    color: var(--text-muted);
    min-width: 45px;
}

.time-current {
    text-align: right;
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
}

.progress-loaded {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--border-color);
    border-radius: 3px;
}

.progress-current {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--gradient);
    border-radius: 3px;
}

.progress-handle {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s;
}

.progress-bar:hover .progress-handle {
    opacity: 1;
}

/* 扩展控制 */
.player-extend {
    display: flex;
    align-items: center;
    gap: 15px;
    justify-content: flex-end;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.volume-bar {
    width: 80px;
    height: 4px;
    background: var(--bg-card);
    border-radius: 2px;
    cursor: pointer;
}

.volume-current {
    height: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    width: 70%;
}

.speed-control {
    position: relative;
}

.speed-menu {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    display: none;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 10px;
}

.speed-menu.show {
    display: flex;
}

.speed-menu span {
    padding: 5px 15px;
    cursor: pointer;
    border-radius: 5px;
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.speed-menu span:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.speed-menu span.active {
    background: var(--primary);
    color: white;
}

/* 章节列表弹窗 */
.chapter-popup {
    position: absolute;
    bottom: 100%;
    left: 0;
    right: 0;
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    max-height: 400px;
    display: none;
    flex-direction: column;
}

.chapter-popup.show {
    display: flex;
}

.chapter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.chapter-header h3 {
    font-size: 16px;
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
}

.btn-close:hover {
    color: var(--text-primary);
}

.chapter-list {
    list-style: none;
    overflow-y: auto;
    flex: 1;
}

.chapter-list li {
    padding: 12px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
    border-bottom: 1px solid var(--border-color);
}

.chapter-list li:hover {
    background: var(--bg-card);
}

.chapter-list li.playing {
    background: var(--primary);
}

.chapter-list li i {
    color: var(--text-muted);
    font-size: 12px;
}

.chapter-list li.playing i {
    color: white;
}

/* ===== 加载和提示 ===== */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 50px;
    color: var(--text-muted);
    font-size: 16px;
}

.loading i {
    font-size: 30px;
    margin-bottom: 10px;
    color: var(--primary);
}

.empty-tip {
    text-align: center;
    padding: 50px;
    color: var(--text-muted);
}

.empty-tip i {
    font-size: 48px;
    margin-bottom: 15px;
    display: block;
}

/* ===== Toast消息 ===== */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 12px 25px;
    border-radius: 25px;
    opacity: 0;
    transition: all 0.3s;
    z-index: 2000;
    border: 1px solid var(--border-color);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--danger);
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 180px 1fr 200px;
    }
}

@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .sidebar, .right-sidebar {
        display: none;
    }

    .player-content {
        grid-template-columns: 1fr auto;
    }

    .player-extend {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }

    .search-box {
        order: 3;
        max-width: 100%;
        width: 100%;
        margin-top: 10px;
    }

    .book-detail-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .book-detail-meta {
        justify-content: center;
    }

    .book-detail-tags {
        justify-content: center;
    }

    .book-detail-actions {
        justify-content: center;
    }

    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-card);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}