/* Vue.js 官网风格样式 - 文件转换应用 */

:root {
    /* Vue.js 官网配色 */
    --vt-c-white: #ffffff;
    --vt-c-white-soft: #f9f9f9;
    --vt-c-white-mute: #f1f1f1;
    
    --vt-c-black: #1a1a1a;
    --vt-c-black-soft: #242424;
    --vt-c-black-mute: #2f2f2f;
    
    --vt-c-divider-light-1: rgba(60, 60, 60, 0.12);
    --vt-c-divider-light-2: rgba(60, 60, 60, 0.06);
    
    --vt-c-text-light-1: #2c3e50;
    --vt-c-text-light-2: #476582;
    --vt-c-text-light-3: #90a4b7;
    
    --vt-c-green: #42b883;
    --vt-c-green-light: #42d392;
    --vt-c-green-lighter: #35eb9a;
    --vt-c-green-dark: #33a06f;
    --vt-c-green-darker: #155f3e;
    
    --vt-c-blue: #3b82f6;
    --vt-c-blue-light: #5fa3f9;
    --vt-c-blue-lighter: #7bb4fb;
    
    --color-background: var(--vt-c-white);
    --color-background-soft: var(--vt-c-white-soft);
    --color-background-mute: var(--vt-c-white-mute);
    
    --color-border: var(--vt-c-divider-light-1);
    --color-border-hover: var(--vt-c-divider-light-2);
    
    --color-heading: var(--vt-c-text-light-1);
    --color-text: var(--vt-c-text-light-2);
    --color-text-light: var(--vt-c-text-light-3);
    
    --color-brand: var(--vt-c-green);
    --color-brand-light: var(--vt-c-green-light);
    --color-brand-dark: var(--vt-c-green-dark);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, 
                 Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 顶部导航栏 - Vue 风格 */
.top-nav {
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: 0 24px;
    height: 64px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.85);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 600;
    color: var(--color-heading);
    transition: opacity 0.2s;
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 32px;
    height: 32px;
    display: inline-block;
}

.nav-actions {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-actions a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
    padding: 8px 12px;
    border-radius: 6px;
}

.nav-actions a:hover {
    color: var(--color-brand);
    background: var(--color-background-soft);
}

.lang-select {
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 14px;
    background: var(--color-background);
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.2s;
}

.lang-select:hover {
    border-color: var(--color-brand);
}

.lang-select:focus {
    outline: none;
    border-color: var(--color-brand);
    box-shadow: 0 0 0 3px rgba(66, 184, 131, 0.1);
}

/* Tab 导航 - Vue 风格 */
.tab-container {
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
}

.tabs {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    gap: 0;
    padding: 0 24px;
}

.audio-separator-tab {
    text-decoration: none;
    color: var(--color-text);
}

.audio-separator-tab:hover {
    color: var(--color-brand);
}

.audio-separator-tab i {
    margin-right: 4px;
}

.tab {
    padding: 16px 20px;
    cursor: pointer;
    color: var(--color-text);
    font-weight: 500;
    font-size: 15px;
    border-bottom: 2px solid transparent;
    transition: all 0.25s;
    position: relative;
}

.tab:hover {
    color: var(--color-brand);
}

.tab.active {
    color: var(--color-brand);
    border-bottom-color: var(--color-brand);
}

/* 主内容区 */
.main-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 48px 24px;
}

/* 分类描述 - Vue 风格提示框 */
.category-desc {
    background: linear-gradient(135deg, rgba(66, 184, 131, 0.05) 0%, rgba(66, 184, 131, 0.02) 100%);
    border: 1px solid rgba(66, 184, 131, 0.2);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 32px;
    position: relative;
    overflow: hidden;
}

.category-desc::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--color-brand);
}

.category-desc-content {
    color: var(--color-text);
    font-size: 14px;
    line-height: 1.7;
    padding-left: 12px;
}

/* 上传区域 - Vue 风格 */
.upload-section {
    background: var(--color-background-soft);
    border: 2px dashed var(--color-border);
    border-radius: 16px;
    padding: 80px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.upload-section:hover {
    border-color: var(--color-brand);
    background: rgba(66, 184, 131, 0.03);
    transform: translateY(-2px);
}

.upload-section.hidden {
    display: none;
}

.upload-icon {
    font-size: 56px;
    color: var(--color-brand);
    margin-bottom: 24px;
    transition: transform 0.3s;
}

.upload-section:hover .upload-icon {
    transform: scale(1.1);
}

.upload-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 12px;
}

.upload-subtitle {
    color: var(--color-text-light);
    font-size: 15px;
}

/* 文件列表区域 */
.files-section {
    display: none;
}

.files-section.show {
    display: block;
}

/* 文件项 - Vue 风格卡片 */
.file-item {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.25s;
}

.file-item:hover {
    border-color: var(--color-brand);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transform: translateY(-1px);
}

.file-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(66, 184, 131, 0.1) 0%, rgba(66, 184, 131, 0.05) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-brand);
    font-size: 20px;
    flex-shrink: 0;
}

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

.file-name {
    font-weight: 500;
    color: var(--color-heading);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 15px;
    margin-bottom: 4px;
}

.file-size {
    color: var(--color-text-light);
    font-size: 13px;
}

.file-status {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    margin-top: 8px;
}

.file-status.uploading {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.file-status.converting {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.file-status.completed {
    background: rgba(66, 184, 131, 0.1);
    color: var(--color-brand-dark);
}

.file-status.error {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

.file-progress {
    width: 100%;
    height: 6px;
    background: var(--color-background-mute);
    border-radius: 3px;
    margin-top: 12px;
    overflow: hidden;
}

.file-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-brand-light), var(--color-brand));
    width: 0%;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 3px;
}

.format-select {
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-heading);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    background: var(--color-background);
    transition: all 0.2s;
}

.format-select:hover {
    border-color: var(--color-brand);
}

.format-select:focus {
    outline: none;
    border-color: var(--color-brand);
    box-shadow: 0 0 0 3px rgba(66, 184, 131, 0.1);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 8px;
    color: var(--color-text-light);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--color-background-soft);
    color: var(--color-heading);
}

.download-btn {
    background: var(--color-brand);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    display: none;
    transition: all 0.2s;
}

.download-btn.show {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.download-btn:hover {
    background: var(--color-brand-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(66, 184, 131, 0.3);
}

/* 底部操作栏 - Vue 风格 */
.action-bar {
    background: var(--color-background-soft);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 32px;
    gap: 16px;
    flex-wrap: wrap;
}

.add-more-btn {
    background: var(--color-background);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 10px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.add-more-btn:hover {
    border-color: var(--color-brand);
    color: var(--color-brand);
    background: rgba(66, 184, 131, 0.05);
}

.convert-btn {
    background: var(--color-brand);
    color: white;
    border: none;
    padding: 12px 40px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.convert-btn:hover {
    background: var(--color-brand-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(66, 184, 131, 0.3);
}

.convert-btn:disabled {
    background: var(--color-text-light);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 批量转换格式选择 */
.batch-format {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text);
    font-size: 14px;
}

.batch-format select {
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-background);
    color: var(--color-heading);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.batch-format select:hover {
    border-color: var(--color-brand);
}

.batch-format select:focus {
    outline: none;
    border-color: var(--color-brand);
    box-shadow: 0 0 0 3px rgba(66, 184, 131, 0.1);
}

/* 下载全部按钮区域 */
.download-all-section {
    display: none;
    text-align: center;
    margin-top: 48px;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-all-section.show {
    display: flex;
}

.new-convert-btn {
    background: var(--color-background);
    color: var(--color-brand);
    border: 2px solid var(--color-brand);
    padding: 14px 32px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.new-convert-btn:hover {
    background: var(--color-brand);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(66, 184, 131, 0.25);
}

.download-all-btn {
    background: var(--color-brand);
    color: white;
    border: none;
    padding: 14px 48px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.download-all-btn:hover {
    background: var(--color-brand-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(66, 184, 131, 0.3);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .top-nav {
        padding: 0 16px;
        height: 56px;
    }
    
    .logo {
        font-size: 18px;
    }
    
    .nav-actions {
        gap: 12px;
    }
    
    .nav-actions a {
        padding: 6px 8px;
        font-size: 13px;
    }
    
    .tabs {
        padding: 0 16px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .tab {
        padding: 12px 16px;
        font-size: 14px;
        white-space: nowrap;
    }
    
    .main-content {
        padding: 24px 16px;
    }
    
    .upload-section {
        padding: 48px 24px;
    }
    
    .upload-icon {
        font-size: 40px;
    }
    
    .upload-title {
        font-size: 20px;
    }
    
    .file-item {
        padding: 16px;
        flex-wrap: wrap;
    }
    
    .action-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .batch-format {
        justify-content: center;
    }
    
    .convert-btn,
    .add-more-btn {
        width: 100%;
        justify-content: center;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--color-background-soft);
}

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

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

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 选中文本样式 */
::selection {
    background: rgba(66, 184, 131, 0.2);
    color: var(--color-heading);
}