/* ============================================
   视频库 - iOS 26 云母磨砂原生风格
   ============================================ */

:root {
    /* 浅色模式 - 云母质感 */
    --bg-page: #f5f5f7;
    --bg-card: rgba(255, 255, 255, 0.78);
    --bg-card-solid: #ffffff;
    --bg-secondary: rgba(245, 245, 247, 0.9);
    --bg-tertiary: rgba(0, 0, 0, 0.04);
    
    /* 云母磨砂 - 多层透明 */
    --mica-bg: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.92) 0%, 
        rgba(255, 255, 255, 0.85) 50%,
        rgba(245, 245, 250, 0.88) 100%);
    --mica-bg-strong: linear-gradient(180deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(252, 252, 255, 0.9) 100%);
    --mica-tint: linear-gradient(180deg, 
        rgba(0, 122, 255, 0.03) 0%, 
        rgba(88, 86, 214, 0.02) 100%);
    --mica-tint-strong: linear-gradient(180deg, 
        rgba(0, 122, 255, 0.06) 0%, 
        rgba(175, 82, 222, 0.04) 100%);
    
    /* 毛玻璃参数 */
    --glass-bg: rgba(255, 255, 255, 0.68);
    --glass-bg-light: rgba(255, 255, 255, 0.55);
    --glass-bg-thick: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-border-subtle: rgba(0, 0, 0, 0.06);
    --glass-blur: blur(50px) saturate(280%);
    --glass-blur-thick: blur(80px) saturate(300%);
    
    /* 阴影层次 */
    --shadow-subtle: 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-strong: 0 16px 48px rgba(0, 0, 0, 0.1), 0 4px 16px rgba(0, 0, 0, 0.05);
    --shadow-float: 0 24px 64px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
    
    /* 文字颜色 */
    --text-primary: #1d1d1f;
    --text-body: #424245;
    --text-secondary: #86868b;
    --text-tertiary: #aeaeb2;
    --text-quaternary: #c7c7cc;
    
    /* 系统色彩 */
    --color-blue: #007aff;
    --color-blue-light: #5ac8fa;
    --color-green: #34c759;
    --color-orange: #ff9500;
    --color-red: #ff3b30;
    --color-purple: #af52de;
    --color-pink: #ff2d55;
    --color-teal: #5ac8fa;
    --color-indigo: #5856d6;
    
    /* 分割线 */
    --divider: rgba(60, 60, 67, 0.08);
    --divider-strong: rgba(60, 60, 67, 0.18);
    
    /* 交互状态 */
    --hover-bg: rgba(0, 0, 0, 0.04);
    --pressed-bg: rgba(0, 0, 0, 0.08);
    --selected-bg: rgba(0, 122, 255, 0.1);
    
    /* 其他 */
    --tag-bg: rgba(120, 120, 128, 0.08);
    --tag-bg-active: rgba(0, 122, 255, 0.1);
    --search-bg: rgba(142, 142, 147, 0.08);
    --star-empty: rgba(120, 120, 128, 0.18);
    --star-fill: #ff9500;
    --thumb-overlay: rgba(0, 0, 0, 0.5);
    
    /* 尺寸变量 */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 22px;
    --radius-pill: 960px;
    --sidebar-w: 280px;
    --toolbar-h: 52px;
    --bottombar-h: 52px;
    
    /* 动画曲线 */
    --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --smooth: cubic-bezier(0.32, 0.72, 0, 1);
    --ease-out: cubic-bezier(0.25, 1, 0.5, 1);
}

/* 深色模式 - 云母深色质感 */
.dark-theme {
    --bg-page: #000000;
    --bg-card: rgba(28, 28, 30, 0.78);
    --bg-card-solid: #1c1c1e;
    --bg-secondary: rgba(44, 44, 46, 0.9);
    --bg-tertiary: rgba(255, 255, 255, 0.04);
    
    /* 云母磨砂 - 深色 */
    --mica-bg: linear-gradient(135deg, 
        rgba(28, 28, 30, 0.92) 0%, 
        rgba(28, 28, 30, 0.88) 50%,
        rgba(34, 34, 36, 0.9) 100%);
    --mica-bg-strong: linear-gradient(180deg, 
        rgba(28, 28, 30, 0.95) 0%, 
        rgba(32, 32, 34, 0.92) 100%);
    --mica-tint: linear-gradient(180deg, 
        rgba(10, 132, 255, 0.06) 0%, 
        rgba(191, 90, 242, 0.04) 100%);
    --mica-tint-strong: linear-gradient(180deg, 
        rgba(10, 132, 255, 0.1) 0%, 
        rgba(191, 90, 242, 0.06) 100%);
    
    --glass-bg: rgba(44, 44, 46, 0.68);
    --glass-bg-light: rgba(44, 44, 46, 0.55);
    --glass-bg-thick: rgba(28, 28, 30, 0.85);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-subtle: rgba(255, 255, 255, 0.05);
    
    --shadow-subtle: none;
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-strong: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-float: 0 24px 64px rgba(0, 0, 0, 0.6);
    
    --text-primary: #ffffff;
    --text-body: #f5f5f7;
    --text-secondary: #98989d;
    --text-tertiary: #636366;
    --text-quaternary: #48484a;
    
    --color-blue: #0a84ff;
    --color-blue-light: #64d2ff;
    --color-green: #32d74b;
    --color-orange: #ff9f0a;
    --color-red: #ff453a;
    --color-purple: #bf5af2;
    --color-pink: #ff375f;
    
    --divider: rgba(84, 84, 88, 0.45);
    --divider-strong: rgba(84, 84, 88, 0.65);
    
    --hover-bg: rgba(255, 255, 255, 0.06);
    --pressed-bg: rgba(255, 255, 255, 0.1);
    --selected-bg: rgba(10, 132, 255, 0.15);
    
    --tag-bg: rgba(120, 120, 128, 0.2);
    --tag-bg-active: rgba(10, 132, 255, 0.15);
    --search-bg: rgba(118, 118, 128, 0.2);
    --star-empty: rgba(120, 120, 128, 0.25);
    --star-fill: #ff9f0a;
    --thumb-overlay: rgba(0, 0, 0, 0.6);
}

@media (prefers-color-scheme: dark) {
    body:not(.light-theme):not(.dark-theme) {
        --bg-page: #000000;
        --bg-card: rgba(28, 28, 30, 0.78);
        --bg-card-solid: #1c1c1e;
        --bg-secondary: rgba(44, 44, 46, 0.9);
        --bg-tertiary: rgba(255, 255, 255, 0.04);
        --mica-bg: linear-gradient(135deg, rgba(28, 28, 30, 0.92), rgba(34, 34, 36, 0.9));
        --mica-bg-strong: linear-gradient(180deg, rgba(28, 28, 30, 0.95), rgba(32, 32, 34, 0.92));
        --mica-tint: linear-gradient(180deg, rgba(10, 132, 255, 0.06), rgba(191, 90, 242, 0.04));
        --mica-tint-strong: linear-gradient(180deg, rgba(10, 132, 255, 0.1), rgba(191, 90, 242, 0.06));
        --glass-bg: rgba(44, 44, 46, 0.68);
        --glass-bg-light: rgba(44, 44, 46, 0.55);
        --glass-bg-thick: rgba(28, 28, 30, 0.85);
        --glass-border: rgba(255, 255, 255, 0.08);
        --glass-border-subtle: rgba(255, 255, 255, 0.05);
        --shadow-subtle: none;
        --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.4);
        --shadow-strong: 0 16px 48px rgba(0, 0, 0, 0.5);
        --shadow-float: 0 24px 64px rgba(0, 0, 0, 0.6);
        --text-primary: #ffffff;
        --text-body: #f5f5f7;
        --text-secondary: #98989d;
        --text-tertiary: #636366;
        --text-quaternary: #48484a;
        --color-blue: #0a84ff;
        --color-blue-light: #64d2ff;
        --color-green: #32d74b;
        --color-orange: #ff9f0a;
        --color-red: #ff453a;
        --color-purple: #bf5af2;
        --color-pink: #ff375f;
        --divider: rgba(84, 84, 88, 0.45);
        --divider-strong: rgba(84, 84, 88, 0.65);
        --hover-bg: rgba(255, 255, 255, 0.06);
        --pressed-bg: rgba(255, 255, 255, 0.1);
        --selected-bg: rgba(10, 132, 255, 0.15);
        --tag-bg: rgba(120, 120, 128, 0.2);
        --tag-bg-active: rgba(10, 132, 255, 0.15);
        --search-bg: rgba(118, 118, 128, 0.2);
        --star-empty: rgba(120, 120, 128, 0.25);
        --star-fill: #ff9f0a;
        --thumb-overlay: rgba(0, 0, 0, 0.6);
    }
}

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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
    background: var(--bg-page);
    color: var(--text-body);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    letter-spacing: -0.022em;
}

@media (display-mode: standalone) {
    body {
        padding-top: env(titlebar-area-height, 0);
    }
}

@media (display-mode: standalone) and (max-width: 767px) {
    body {
        padding-top: 0;
    }
}

::selection {
    background: rgba(0, 122, 255, 0.22);
}

/* ========== 云母磨砂核心材质 ========== */

/* 云母基础层 - 用于工具栏、侧边栏等大面积区域 */
.mica {
    background: var(--mica-bg);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
}

/* 云母增强层 - 用于悬浮面板、弹窗 */
.mica-strong {
    background: var(--mica-bg-strong);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
}

/* 毛玻璃层 - 用于卡片、列表项 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

/* 毛玻璃轻层 */
.glass-light {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

/* 毛玻璃厚层 */
.glass-thick {
    background: var(--glass-bg-thick);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
}

/* 色彩沾染层 - 添加微妙蓝紫渐变 */
.mica-tint::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--mica-tint);
    border-radius: inherit;
    pointer-events: none;
    opacity: 0.6;
}

/* ========== 工具栏 - 云母浮动 ========== */
.toolbar {
    position: fixed;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    right: auto;
    width: calc(100% - 16px);
    max-width: 1400px;
    height: var(--toolbar-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    z-index: 100;
    border-radius: var(--radius-lg);
    background: var(--mica-bg);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
    box-shadow: var(--shadow-medium), inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
    border: 0.5px solid var(--glass-border);
}

.toolbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--mica-tint);
    border-radius: inherit;
    pointer-events: none;
    opacity: 0.4;
}

.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: 2px;
    position: relative;
    z-index: 1;
}

.toolbar-center {
    flex: 1;
    display: flex;
    justify-content: center;
    max-width: 480px;
    margin: 0 16px;
    position: relative;
    z-index: 1;
}

.app-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.022em;
}

.video-count {
    font-size: 13px;
    color: var(--text-secondary);
    margin-left: 6px;
    font-weight: 400;
}

/* ========== 搜索框 - 云母内凹 ========== */
.search-box {
    position: relative;
    width: 100%;
    height: 34px;
    background: var(--search-bg);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    padding: 0 10px;
    transition: background 0.2s ease, box-shadow 0.25s ease;
    border: 0.5px solid transparent;
}

.search-box:focus-within {
    background: var(--hover-bg);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15), var(--shadow-soft);
    border-color: rgba(0, 122, 255, 0.25);
}

.search-icon {
    color: var(--text-secondary);
    flex-shrink: 0;
    margin-right: 6px;
    opacity: 0.65;
    transition: opacity 0.2s;
}

.search-box:focus-within .search-icon {
    opacity: 1;
}

#search-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 15px;
    color: var(--text-body);
    font-family: inherit;
    letter-spacing: -0.009em;
}

#search-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.search-clear {
    background: var(--text-tertiary);
    border: none;
    color: var(--bg-card-solid);
    cursor: pointer;
    display: none;
    padding: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s var(--spring), background 0.15s;
}

.search-clear:hover {
    transform: scale(1.12);
    background: var(--text-secondary);
}

.search-box.has-input .search-clear {
    display: flex;
}

/* ========== 工具栏按钮 - SF Symbols ========== */
.toolbar-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--color-blue);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, transform 0.2s var(--spring), opacity 0.15s;
    -webkit-tap-highlight-color: transparent;
    position: relative;
}

.toolbar-btn:hover {
    background: var(--hover-bg);
}

.toolbar-btn:active {
    background: var(--pressed-bg);
    transform: scale(0.92);
}

.toolbar-btn svg {
    width: 20px;
    height: 20px;
    color: var(--color-blue);
    opacity: 0.95;
}

#btn-theme {
    font-size: 18px;
    line-height: 1;
}

.toolbar-btn .badge {
    position: absolute;
    top: 7px;
    right: 7px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-red);
    box-shadow: 0 0 0 2px var(--bg-card-solid);
}

/* ========== 下拉菜单 - 云母悬浮 ========== */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 46px;
    right: 0;
    border-radius: var(--radius-md);
    padding: 6px;
    min-width: 200px;
    display: none;
    z-index: 200;
    transform: scale(0.92) translateY(-4px);
    opacity: 0;
    transform-origin: top right;
    transition: transform 0.3s var(--spring), opacity 0.2s ease;
    background: var(--mica-bg-strong);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
    box-shadow: var(--shadow-strong), inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
    border: 0.5px solid var(--glass-border);
    overflow: hidden;
}

.dropdown.open .dropdown-menu {
    display: block;
    transform: scale(1) translateY(0);
    opacity: 1;
}

.dropdown-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 11px 12px;
    border: none;
    background: transparent;
    text-align: left;
    font-size: 15px;
    color: var(--text-primary);
    cursor: pointer;
    font-family: inherit;
    border-radius: var(--radius-sm);
    transition: background 0.15s ease;
    letter-spacing: -0.009em;
}

.dropdown-item:hover {
    background: var(--hover-bg);
}

.dropdown-item:active {
    background: var(--pressed-bg);
}

/* ========== 主体布局 ========== */
.main-layout {
    display: flex;
    height: 100vh;
    padding-top: calc(var(--toolbar-h) + 16px);
    padding-bottom: calc(var(--bottombar-h) + 16px);
}

/* ========== 侧边栏 - 云母分层 ========== */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    padding: 8px 10px;
    border-right: none;
    position: relative;
}

.sidebar::before {
    content: '';
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-w);
    background: var(--mica-bg);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
    z-index: -1;
}

.sidebar-content {
    padding: 4px 0 20px;
}

.sidebar-section {
    margin-bottom: 14px;
    padding: 8px;
    border-radius: var(--radius-md);
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-subtle), inset 0 0.5px 0 rgba(255, 255, 255, 0.4);
    border: 0.5px solid var(--glass-border-subtle);
    position: relative;
    overflow: hidden;
}

.sidebar-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--mica-tint);
    border-radius: inherit;
    pointer-events: none;
    opacity: 0.25;
}

.sidebar-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    margin-bottom: 6px;
    padding-left: 8px;
    text-transform: uppercase;
}

/* ========== 文件夹标签 ========== */
.folder-tabs {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.folder-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 15px;
    color: var(--text-primary);
    transition: background 0.15s ease;
    user-select: none;
    letter-spacing: -0.009em;
}

.folder-tab:hover {
    background: var(--hover-bg);
}

.folder-tab:active {
    background: var(--pressed-bg);
}

.folder-tab.active {
    background: var(--selected-bg);
    color: var(--color-blue);
    font-weight: 500;
}

.folder-tab .folder-icon {
    width: 18px;
    height: 18px;
    color: var(--color-blue);
    flex-shrink: 0;
    opacity: 0.9;
}

.folder-tab .folder-count {
    margin-left: auto;
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.folder-tab.active .folder-count {
    color: var(--color-blue);
}

.folder-tab.new-folder {
    color: var(--text-tertiary);
    justify-content: flex-start;
    gap: 6px;
    font-size: 14px;
}

.folder-tab.new-folder:hover {
    color: var(--color-blue);
    background: var(--hover-bg);
}

.delete-folder-btn {
    background: rgba(255, 59, 48, 0.15);
    color: #ff3b30;
    border: none;
    border-radius: 6px;
    width: 20px;
    height: 20px;
    font-size: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, opacity 0.15s ease;
    opacity: 0;
}

.folder-tab:hover .delete-folder-btn {
    opacity: 1;
}

.delete-folder-btn:hover {
    background: rgba(255, 59, 48, 0.3);
}

.delete-folder-btn:active {
    background: rgba(255, 59, 48, 0.5);
}

/* ========== 自定义对话框 ========== */
.dialog-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.dialog-overlay.active {
    opacity: 1;
    visibility: visible;
}

.dialog-box {
    width: 340px;
    padding: 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    animation: dialogPop 0.3s var(--spring);
}

@keyframes dialogPop {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.dialog-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.dialog-message {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0 0 16px 0;
    line-height: 1.5;
}

.dialog-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s ease;
    box-sizing: border-box;
    margin-bottom: 16px;
}

.dialog-input:focus {
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.dialog-input.hidden {
    display: none;
}

.dialog-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.dialog-btn {
    padding: 8px 20px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
}

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

.dialog-cancel {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.dialog-cancel:hover {
    background: var(--hover-bg);
}

.dialog-confirm {
    background: var(--color-blue);
    color: #fff;
}

.dialog-confirm:hover {
    background: #0066d6;
}

/* ========== 标签筛选 ========== */
.tag-filter-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.tag-filter-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 15px;
    color: var(--text-primary);
    transition: background 0.15s ease;
    user-select: none;
    letter-spacing: -0.009em;
}

.tag-filter-item:hover {
    background: var(--hover-bg);
}

.tag-filter-item:active {
    background: var(--pressed-bg);
}

.tag-filter-item.active {
    background: var(--selected-bg);
    color: var(--color-blue);
    font-weight: 500;
}

.tag-filter-count {
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.tag-filter-item.active .tag-filter-count {
    color: var(--color-blue);
}

/* ========== 收藏筛选 ========== */
.favorite-filter {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.favorite-filter-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 15px;
    transition: background 0.15s ease;
    letter-spacing: -0.009em;
    color: var(--text-primary);
}

.favorite-filter-item:hover {
    background: var(--hover-bg);
}

.favorite-filter-item:active {
    background: var(--pressed-bg);
}

.favorite-filter-item.active {
    background: var(--selected-bg);
    color: var(--color-blue);
}

/* ========== 时长筛选 ========== */
.duration-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 2px;
}

.filter-chip {
    padding: 7px 12px;
    border-radius: var(--radius-pill);
    border: none;
    background: var(--tag-bg);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.15s ease, color 0.15s ease, transform 0.15s var(--spring);
    letter-spacing: -0.008em;
}

.filter-chip:hover {
    background: var(--hover-bg);
}

.filter-chip:active {
    background: var(--pressed-bg);
    transform: scale(0.96);
}

.filter-chip.active {
    background: var(--selected-bg);
    color: var(--color-blue);
}

/* ========== 智能分组 ========== */
.smart-group-block {
    margin-bottom: 8px;
}
.smart-group-block:last-child {
    margin-bottom: 0;
}
.smart-group-label {
    font-size: 12px;
    color: var(--text-tertiary);
    padding: 2px 8px 4px;
}
.smart-group-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
}
.smart-group-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    transition: background 0.15s ease;
}
.smart-group-item:hover {
    background: var(--hover-bg);
}
.smart-group-item:active {
    background: var(--pressed-bg);
}
.smart-group-item.active {
    background: var(--selected-bg);
    color: var(--color-blue);
    font-weight: 500;
}
.smart-group-count {
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
}
.smart-group-item.active .smart-group-count {
    color: var(--color-blue);
}

/* ========== 排序选择 ========== */
.sort-select {
    width: 100%;
    padding: 10px 8px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    cursor: pointer;
    outline: none;
    letter-spacing: -0.009em;
}

.sidebar-footer {
    margin-top: 6px;
    padding: 0 2px;
}

.clear-filters-btn {
    width: 100%;
    padding: 10px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--color-red);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.15s ease;
    letter-spacing: -0.009em;
}

.clear-filters-btn:hover {
    background: rgba(255, 59, 48, 0.1);
}

.clear-filters-btn:active {
    background: rgba(255, 59, 48, 0.18);
}

/* ========== 内容区 ========== */
.content-area {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 4px 16px 12px;
    position: relative;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

/* ========== 空状态 ========== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 24px;
}

.empty-icon {
    width: 88px;
    height: 88px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.08), rgba(88, 86, 214, 0.06));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    position: relative;
    box-shadow: 0 8px 32px rgba(0, 122, 255, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.empty-icon::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: calc(var(--radius-xl) + 8px);
    background: linear-gradient(135deg, rgba(0, 122, 255, 0.12), rgba(175, 82, 222, 0.08));
    z-index: -1;
    filter: blur(16px);
    opacity: 0.6;
}

.empty-icon svg {
    width: 40px;
    height: 40px;
    color: var(--color-blue);
    opacity: 0.65;
}

.empty-state h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.026em;
}

.empty-state p {
    font-size: 15px;
    margin-bottom: 28px;
    max-width: 260px;
    line-height: 1.45;
    letter-spacing: -0.009em;
}

.primary-btn {
    padding: 12px 28px;
    border-radius: var(--radius-pill);
    border: none;
    background: var(--color-blue);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: opacity 0.15s ease, transform 0.2s var(--spring), box-shadow 0.2s ease;
    letter-spacing: -0.009em;
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.28), 0 1px 4px rgba(0, 122, 255, 0.2);
}

.primary-btn:hover {
    opacity: 0.92;
    box-shadow: 0 6px 24px rgba(0, 122, 255, 0.32), 0 2px 6px rgba(0, 122, 255, 0.2);
}

.primary-btn:active {
    transform: scale(0.96);
    opacity: 0.88;
}

/* ========== 视频网格 ========== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
    padding-bottom: 16px;
}

/* ============ 分组标题 ============ */
.group-header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 14px 2px 6px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--glass-border-subtle, rgba(255, 255, 255, 0.12));
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    position: sticky;
    top: 0;
    backdrop-filter: blur(6px);
    background: linear-gradient(to bottom, var(--bg-main) 60%, transparent);
}

.group-header .group-label {
    letter-spacing: 0.5px;
}

.group-header .group-count {
    font-size: 11px;
    font-weight: 500;
    opacity: 0.65;
    background: rgba(127, 127, 127, 0.2);
    border-radius: 10px;
    padding: 1px 8px;
}

.video-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 10px;
    cursor: pointer;
    box-shadow: var(--shadow-soft), inset 0 0.5px 0 rgba(255, 255, 255, 0.6);
    border: 0.5px solid var(--glass-border-subtle);
    transition: transform 0.35s var(--spring), box-shadow 0.25s ease;
    position: relative;
    overflow: hidden;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.video-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--mica-tint);
    border-radius: inherit;
    pointer-events: none;
    opacity: 0.15;
}

.video-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: var(--shadow-strong), inset 0 0.5px 0 rgba(255, 255, 255, 0.7);
}

.video-card:active {
    transform: scale(0.98);
}

.video-card-thumb {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-secondary);
    margin-bottom: 10px;
}

.video-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.video-card:hover .video-card-thumb img {
    transform: scale(1.04);
}

.video-card-thumb .placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 28px;
}

.duration-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #fff;
    font-size: 11px;
    padding: 3px 7px;
    border-radius: 5px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.res-badge {
    position: absolute;
    bottom: 6px;
    right: 6px;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #fff;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(0, 0, 0, 0.35);
}

.progress-fill {
    height: 100%;
    background: var(--color-blue);
    border-radius: 0 2px 2px 0;
    transition: width 0.3s ease;
}

.favorite-badge {
    position: absolute;
    top: 6px;
    left: 6px;
    font-size: 16px;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
}

.video-card-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 3px;
    padding: 0 2px;
    letter-spacing: -0.008em;
}

.video-card-meta {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 7px;
    padding: 0 2px;
}

.video-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 4px;
    padding: 0 2px;
}

.tag-chip {
    padding: 3px 8px;
    border-radius: var(--radius-pill);
    font-size: 11px;
    font-weight: 600;
    background: var(--selected-bg);
    color: var(--color-blue);
    display: inline-block;
    letter-spacing: 0.01em;
}



/* ========== 大卡片视图 ========== */
.video-large-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
    padding-bottom: 16px;
}

.video-large-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-soft), inset 0 0.5px 0 rgba(255, 255, 255, 0.6);
    border: 0.5px solid var(--glass-border-subtle);
    transition: transform 0.35s var(--spring), box-shadow 0.25s ease;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.video-large-card:hover {
    transform: translateY(-4px) scale(1.005);
    box-shadow: var(--shadow-strong), inset 0 0.5px 0 rgba(255, 255, 255, 0.7);
}

.video-large-card:active {
    transform: scale(0.98);
}

.video-large-card .large-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    position: relative;
    background: var(--bg-secondary);
}

.video-large-card .large-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.video-large-card:hover .large-thumb img {
    transform: scale(1.04);
}

.video-large-card .large-info {
    padding: 12px 14px;
}

.video-large-card .large-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.012em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.video-large-card .large-meta {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    letter-spacing: -0.008em;
}

.video-large-card .large-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.video-large-card .large-tags {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

/* ========== 列表视图 ========== */
.video-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding-bottom: 16px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-soft), inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
    border: 0.5px solid var(--glass-border-subtle);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.video-list-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-bottom: 0.5px solid var(--divider);
    cursor: pointer;
    transition: background 0.15s ease;
    background: var(--bg-card);
}

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

.video-list-item:hover {
    background: var(--hover-bg);
}

.video-list-item:active {
    background: var(--pressed-bg);
}

.list-thumb {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-subtle);
}

.list-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

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

.list-name {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.009em;
}

.list-meta {
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: -0.008em;
}

.list-tags {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.list-tags .tag-chip {
    font-size: 10px;
    padding: 2px 7px;
}



.list-actions {
    display: flex;
    gap: 2px;
}

.list-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--color-blue);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: background 0.15s ease;
}

.list-btn:hover {
    background: var(--hover-bg);
}

.list-btn:active {
    background: var(--pressed-bg);
}

/* ========== 紧凑视图 ========== */
.video-compact {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding-bottom: 16px;
}

.compact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s ease;
}

.compact-item:hover {
    background: var(--hover-bg);
}

.compact-item:active {
    background: var(--pressed-bg);
}

.compact-item .compact-name {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.008em;
}

.compact-item .compact-meta {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}



/* ========== 扫描进度 ========== */
.scan-progress {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}

.progress-ring {
    width: 68px;
    height: 68px;
}

.progress-ring svg {
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--tag-bg);
    stroke-width: 3.5;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--color-blue);
    stroke-width: 3.5;
    stroke-linecap: round;
    transition: stroke-dasharray 0.35s var(--smooth);
}

.progress-text {
    font-size: 15px;
    color: var(--text-secondary);
    letter-spacing: -0.009em;
}

/* ========== 详情面板 - 云母悬浮 ========== */
.detail-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 150;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.detail-overlay.active {
    display: block;
    opacity: 1;
}

.detail-panel {
    position: fixed;
    top: 8px;
    right: 8px;
    bottom: calc(var(--bottombar-h) + 16px);
    width: 360px;
    border-radius: var(--radius-lg);
    z-index: 160;
    transform: translateX(calc(100% + 16px));
    transition: transform 0.4s var(--smooth);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--mica-bg-strong);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
    box-shadow: var(--shadow-float), inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
    border: 0.5px solid var(--glass-border);
}

.detail-panel.active {
    transform: translateX(0);
}

.detail-panel-inner {
    padding: 14px;
    position: relative;
}

.detail-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.45);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform 0.2s var(--spring), background 0.15s ease;
}

.detail-close:hover {
    background: rgba(0, 0, 0, 0.55);
    transform: scale(1.08);
}

.detail-close:active {
    transform: scale(0.92);
}

.detail-thumbnail {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-secondary);
    margin-bottom: 14px;
}

.detail-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.detail-header {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 5px;
}

.detail-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
    word-break: break-all;
    letter-spacing: -0.015em;
}

.edit-title-btn {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-xs);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s ease, color 0.15s ease;
}

.edit-title-btn:hover {
    background: var(--hover-bg);
    color: var(--color-blue);
}

.edit-title-btn:active {
    background: var(--pressed-bg);
}

.detail-meta {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    letter-spacing: -0.008em;
}

.detail-divider {
    height: 0.5px;
    background: var(--divider);
    margin: 12px 0;
}

.detail-section h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}

.detail-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 11px;
    border-radius: var(--radius-pill);
    background: var(--selected-bg);
    color: var(--color-blue);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: -0.008em;
}

.detail-tag .remove-tag {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: none;
    background: none;
    color: var(--color-blue);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    padding: 0;
    transition: background 0.15s ease;
}

.detail-tag .remove-tag:hover {
    background: rgba(0, 122, 255, 0.15);
}

.tag-input-wrapper {
    position: relative;
}

.tag-input {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-body);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: background 0.15s ease, box-shadow 0.2s ease;
    letter-spacing: -0.009em;
}

.tag-input:focus {
    background: var(--hover-bg);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.12);
}

.tag-input::placeholder {
    color: var(--text-secondary);
}



.note-input {
    width: 100%;
    min-height: 85px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-body);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    outline: none;
    transition: background 0.15s ease, box-shadow 0.2s ease;
    letter-spacing: -0.009em;
    line-height: 1.45;
}

.note-input:focus {
    background: var(--hover-bg);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.12);
}

.note-input::placeholder {
    color: var(--text-secondary);
}

.detail-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.play-btn {
    width: 100%;
    padding: 13px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--color-blue);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: opacity 0.15s ease, transform 0.15s var(--spring), box-shadow 0.2s ease;
    letter-spacing: -0.009em;
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.22);
}

.play-btn:hover {
    opacity: 0.92;
}

.play-btn:active {
    transform: scale(0.98);
    opacity: 0.88;
}

.secondary-btn {
    width: 100%;
    padding: 13px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--bg-tertiary);
    color: var(--color-blue);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.15s ease;
    letter-spacing: -0.009em;
}

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

.secondary-btn:active {
    background: var(--pressed-bg);
}

.danger-btn {
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--color-red);
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    transition: opacity 0.15s ease;
    letter-spacing: -0.009em;
}

.danger-btn:hover {
    opacity: 0.9;
}

/* ========== 底部视图栏 - 云母浮动 ========== */
.bottom-bar {
    position: fixed;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 3px;
    padding: 6px;
    border-radius: var(--radius-pill);
    z-index: 90;
    background: var(--mica-bg);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
    box-shadow: var(--shadow-medium), inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
    border: 0.5px solid var(--glass-border);
}

.bottom-bar .view-btn {
    width: 42px;
    height: 38px;
    border-radius: var(--radius-pill);
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s var(--spring);
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
}

.bottom-bar .view-btn:hover {
    color: var(--text-primary);
}

.bottom-bar .view-btn.active {
    background: var(--glass-bg-thick);
    color: var(--color-blue);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: var(--shadow-soft), inset 0 0.5px 0 rgba(255, 255, 255, 0.6);
}

.bottom-bar .view-btn:active {
    transform: scale(0.92);
}

.bottom-bar .view-btn svg {
    width: 18px;
    height: 18px;
}

.bottom-bar .divider-line {
    width: 0.5px;
    height: 22px;
    background: var(--divider);
    margin: 0 4px;
}

/* ========== 播放器 ========== */
.player-modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
}

.player-modal.active {
    display: flex;
}

.player-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
}

.player-container {
    position: relative;
    width: 92vw;
    max-width: 1200px;
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    z-index: 1;
    box-shadow: 0 32px 96px rgba(0, 0, 0, 0.55);
}

.player-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: background 0.15s ease, transform 0.2s var(--spring);
}

.player-close:hover {
    background: rgba(0, 0, 0, 0.6);
    transform: scale(1.05);
}

.player-close:active {
    transform: scale(0.92);
}

.player-video {
    width: 100%;
    height: 100%;
    display: block;
}

/* ========== 确认对话框 ========== */
.confirm-modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
}

.confirm-modal.active {
    display: flex;
}

.confirm-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.confirm-box {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 22px;
    width: 270px;
    max-width: 90vw;
    z-index: 1;
    text-align: center;
    transform: scale(0.88);
    opacity: 0;
    transition: transform 0.35s var(--spring), opacity 0.25s ease;
    background: var(--mica-bg-strong);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
    box-shadow: var(--shadow-strong), inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
    border: 0.5px solid var(--glass-border);
}

.confirm-modal.active .confirm-box {
    transform: scale(1);
    opacity: 1;
}

.confirm-box h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.012em;
}

.confirm-box p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 22px;
    line-height: 1.45;
    letter-spacing: -0.008em;
}

.confirm-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.confirm-actions .secondary-btn,
.confirm-actions .danger-btn {
    width: 100%;
    padding: 12px;
}

/* ========== Toast ========== */
.toast {
    position: fixed;
    bottom: calc(var(--bottombar-h) + 24px);
    left: 50%;
    transform: translateX(-50%) translateY(60px);
    background: rgba(44, 44, 46, 0.9);
    color: #fff;
    padding: 12px 22px;
    border-radius: var(--radius-pill);
    font-size: 14px;
    font-weight: 500;
    z-index: 400;
    opacity: 0;
    transition: transform 0.4s var(--spring), opacity 0.3s ease;
    pointer-events: none;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: var(--shadow-strong);
    letter-spacing: -0.008em;
}

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

/* ========== Modal ========== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.modal-box {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 20px;
    width: 290px;
    z-index: 1;
    transform: scale(0.88);
    opacity: 0;
    transition: transform 0.35s var(--spring), opacity 0.25s ease;
    background: var(--mica-bg-strong);
    backdrop-filter: var(--glass-blur-thick);
    -webkit-backdrop-filter: var(--glass-blur-thick);
    box-shadow: var(--shadow-strong), inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
    border: 0.5px solid var(--glass-border);
}

.modal.active .modal-box {
    transform: scale(1);
    opacity: 1;
}

.modal-box h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
    text-align: center;
    letter-spacing: -0.012em;
}

.sort-options {
    display: flex;
    flex-direction: column;
    gap: 1px;
    margin-bottom: 14px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 3px;
}

.sort-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 12px;
    font-size: 15px;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--radius-xs);
    transition: background 0.15s ease;
    letter-spacing: -0.009em;
}

.sort-option:hover {
    background: var(--hover-bg);
}

.sort-option:active {
    background: var(--pressed-bg);
}

.sort-option input {
    accent-color: var(--color-blue);
    width: 18px;
    height: 18px;
}

.modal-close-btn {
    width: 100%;
    padding: 13px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--color-blue);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: opacity 0.15s ease, transform 0.15s var(--spring);
    letter-spacing: -0.009em;
}

.modal-close-btn:hover {
    opacity: 0.92;
}

.modal-close-btn:active {
    transform: scale(0.98);
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) {
    .sidebar {
        display: none;
    }
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    }
}

@media (max-width: 767px) {
    .toolbar {
        top: 4px;
        width: calc(100% - 8px);
        height: 48px;
        border-radius: var(--radius-md);
        padding: 0 10px;
    }
    .toolbar-center {
        display: none;
    }
    .app-title {
        font-size: 16px;
    }
    .main-layout {
        padding-top: 56px;
        padding-bottom: calc(var(--bottombar-h) + 12px);
    }
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .video-card {
        padding: 8px;
    }
    .video-card-thumb {
        border-radius: var(--radius-xs);
        margin-bottom: 8px;
    }
    .video-card-name {
        font-size: 13px;
    }
    .video-card-tags {
        display: none;
    }
    .detail-panel {
        width: 100%;
        top: auto;
        bottom: 0;
        height: 88vh;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        transform: translateY(100%);
    }
    .detail-panel.active {
        transform: translateY(0);
    }
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
    width: 5px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

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

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

/* ========== 高亮 ========== */
.highlight {
    background: rgba(255, 149, 0, 0.22);
    border-radius: 3px;
    padding: 0 2px;
}

/* ========== 悬停预览 ========== */
.hover-preview {
    position: fixed;
    z-index: 500;
    pointer-events: none;
    opacity: 0;
    transform: translateX(-50%) translateY(-10px) scale(0.95);
    transition: opacity 0.2s ease, transform 0.3s var(--spring);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-float);
    background: #000;
}

.hover-preview.active {
    opacity: 1;
    transform: translateX(-50%) translateY(-16px) scale(1);
}

.hover-preview-video {
    width: 280px;
    height: 158px;
    display: block;
    object-fit: cover;
}

.hover-preview-info {
    padding: 8px 10px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hover-preview-name {
    font-size: 13px;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.hover-preview-duration {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========== 入场动画 ========== */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.video-card,
.video-list-item,
.compact-item,
.video-large-card {
    animation: fadeUp 0.38s var(--smooth) backwards;
}

.video-card:nth-child(1),
.video-list-item:nth-child(1),
.compact-item:nth-child(1),
.video-large-card:nth-child(1) { animation-delay: 0.02s; }
.video-card:nth-child(2),
.video-large-card:nth-child(2) { animation-delay: 0.04s; }
.video-card:nth-child(3),
.video-large-card:nth-child(3) { animation-delay: 0.06s; }
.video-card:nth-child(4),
.video-large-card:nth-child(4) { animation-delay: 0.08s; }
.video-card:nth-child(5),
.video-large-card:nth-child(5) { animation-delay: 0.1s; }
.video-card:nth-child(6),
.video-large-card:nth-child(6) { animation-delay: 0.12s; }
.video-card:nth-child(7),
.video-large-card:nth-child(7) { animation-delay: 0.14s; }
.video-card:nth-child(8),
.video-large-card:nth-child(8) { animation-delay: 0.16s; }
.video-card:nth-child(9),
.video-large-card:nth-child(9) { animation-delay: 0.18s; }
.video-card:nth-child(10),
.video-large-card:nth-child(10) { animation-delay: 0.2s; }
.video-card:nth-child(n+11),
.video-large-card:nth-child(n+11) { animation-delay: 0.22s; }