/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #059669;
    --warning-color: #d97706;
    --error-color: #dc2626;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #e2e8f0;
    
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    
    --z-index-dropdown: 1000;
    --z-index-overlay: 2000;
    --z-index-modal: 3000;
    --z-index-toast: 4000;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', Roboto, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 顶部导航栏 */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-index-dropdown);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.app-title i {
    font-size: var(--font-size-2xl);
}

.controls {
    display: flex;
    gap: 0.75rem;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.control-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.control-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 1.5rem;
}

/* 页面导航 */
.page-navigation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.nav-btn {
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.nav-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.nav-btn:disabled:hover {
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.page-info {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--text-primary);
    min-width: 4rem;
    text-align: center;
}

.progress-bar {
    flex: 1;
    max-width: 200px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-left: 1rem;
}

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

/* 页面容器 */
.page-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading {
    text-align: center;
    color: var(--text-muted);
}

.loading i {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.page-content {
    width: 100%;
    height: 100%;
}

.page-image-container {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.page-image {
    max-width: 100%;
    max-height: 80vh;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    display: block;
}

/* 文本覆盖层 */
.text-overlays {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.text-piece {
    position: absolute;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    pointer-events: all;
    transition: all 0.3s ease;
    padding: 0;
}

.text-piece:hover {
    background: rgba(37, 99, 235, 0.08);
    border-color: rgba(37, 99, 235, 0.8);
    border-width: 2px;
    box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.2);
}

.text-piece.active {
    background: rgba(37, 99, 235, 0.12);
    border-color: var(--primary-color);
    border-width: 2px;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.4);
    animation: activeFlash 1s ease-in-out;
}

.text-piece.playing {
    border-color: var(--success-color);
    box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.4);
    animation: playingPulse 2s ease-in-out infinite;
}

/* 交互模式下显示所有区域的轮廓 */
.show-interactive-areas .text-piece {
    background: rgba(37, 99, 235, 0.05);
    border-color: rgba(37, 99, 235, 0.3);
    border-width: 1px;
}

.show-interactive-areas .text-piece:hover {
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary-color);
    border-width: 2px;
}

.piece-text {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 1);
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    opacity: 0;
    pointer-events: none;
    display: none;
}

.piece-translation {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.125rem;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 1);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    opacity: 0;
    pointer-events: none;
    display: none;
}

/* 交互模式下显示文本（仅用于调试） */
.show-interactive-areas .piece-text {
    opacity: 0.6;
    display: block;
    background: rgba(255, 255, 255, 0.9);
    padding: 0.125rem 0.25rem;
    border-radius: 2px;
    font-size: 0.7rem;
}

.show-interactive-areas .piece-translation {
    opacity: 0.5;
    display: block;
    background: rgba(255, 255, 255, 0.8);
    padding: 0.125rem 0.25rem;
    border-radius: 2px;
    font-size: 0.6rem;
}

/* 底部控制面板 */
.bottom-panel {
    margin-top: 1.5rem;
}

.audio-player {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    box-shadow: var(--shadow-md);
}

.audio-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.audio-text {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--text-primary);
    text-align: center;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
}

.audio-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.audio-btn {
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.audio-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

.audio-progress {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.audio-timeline {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
}

.audio-progress-bar {
    height: 100%;
    background: var(--primary-color);
    border-radius: 2px;
    transition: width 0.1s ease;
}

.audio-time {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* 搜索面板 */
.search-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-index-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.search-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
}

.search-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.search-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

.search-input-container {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.search-input-container input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    outline: none;
    transition: border-color 0.2s ease;
}

.search-input-container input:focus {
    border-color: var(--primary-color);
}

.search-btn {
    padding: 0.75rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

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

.search-results {
    min-height: 200px;
}

.search-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem;
    font-style: italic;
}

.search-result-item {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.search-result-item:hover {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
}

.search-result-page {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.search-result-text {
    font-weight: 500;
    margin-bottom: 0.25rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
}

.search-result-translation {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
}

.search-highlight {
    background: yellow;
    padding: 0.125rem 0.25rem;
    border-radius: 2px;
}

/* 书签面板 */
.bookmark-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-index-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.bookmark-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
}

.bookmark-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bookmark-body {
    padding: 1.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

.bookmark-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem;
    font-style: italic;
}

.bookmark-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.bookmark-item:hover {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
}

.bookmark-info {
    flex: 1;
}

.bookmark-page {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.bookmark-time {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.bookmark-actions {
    display: flex;
    gap: 0.5rem;
}

.bookmark-delete {
    width: 1.5rem;
    height: 1.5rem;
    border: none;
    background: var(--error-color);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

.bookmark-delete:hover {
    transform: scale(1.1);
}

/* 设置面板 */
.settings-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-index-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.settings-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
}

.settings-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.settings-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.close-btn {
    width: 2rem;
    height: 2rem;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
}

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

.settings-body {
    padding: 1.5rem;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.setting-item label {
    font-weight: 500;
    color: var(--text-primary);
}

.setting-item input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary-color);
}

.setting-item select {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* 消息提示 */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-index-toast);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.toast.show {
    opacity: 1;
    visibility: visible;
}

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

.toast.warning {
    background: var(--warning-color);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .controls {
        width: 100%;
        justify-content: center;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .page-navigation {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
    
    .progress-bar {
        width: 100%;
        margin-left: 0;
        margin-top: 0.5rem;
    }
    
    .audio-controls {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .control-btn span {
        display: none;
    }
    
    .text-piece {
        min-width: 2rem;
        min-height: 1.5rem;
    }
    
    .piece-text {
        font-size: 0.75rem;
    }
    
    .piece-translation {
        font-size: 0.625rem;
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: var(--font-size-lg);
    }
    
    .page-info {
        font-size: var(--font-size-base);
    }
    
    .settings-content {
        margin: 0.5rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(1rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes activeFlash {
    0% {
        box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.4);
    }
    50% {
        box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.6);
    }
    100% {
        box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.4);
    }
}

@keyframes playingPulse {
    0% {
        box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.4);
    }
    50% {
        box-shadow: 0 0 0 4px rgba(5, 150, 105, 0.6);
    }
    100% {
        box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.4);
    }
}

.page-content {
    animation: fadeIn 0.3s ease;
}

.text-piece.playing {
    animation: pulse 1s ease-in-out infinite;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

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

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

/* 目录面板样式 */
.catalog-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: var(--z-index-modal);
}

.catalog-content {
    background: white;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.catalog-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.catalog-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.catalog-body {
    padding: 1rem;
    overflow-y: auto;
    flex: 1;
}

.catalog-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.catalog-item {
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.catalog-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.catalog-name {
    flex: 1;
}

.catalog-name-en {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.catalog-name-cn {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.catalog-pages {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.catalog-empty {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
}

/* 搜索结果高亮 */
.search-highlight {
    background: #fef08a;
    padding: 0 2px;
    border-radius: 2px;
}