/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-color: #000000 #000000;
    scrollbar-width: auto;
}

body {
    font-family: 'Roboto', Arial, sans-serif;
    background-color: #121212;
    color: #ffffff;
}

/* 主容器 */
.youtube-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* 顶栏样式 */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    height: 56px;
    background-color: #000000;
    border-bottom: 1px solid #303030;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
}

.menu-btn {
    background: none;
    border: none;
    font-size: 24px;
    padding: 8px;
    margin-right: 16px;
    cursor: pointer;
    color: #909090;
}

.youtube-logo img {
    height: 20px;
}

.header-center {
    display: flex;
    align-items: center;
    flex: 1;
    max-width: 640px;
    margin: 0 40px;
}

.search-container {
    display: flex;
    align-items: center;
    width: 100%;
}

.search-input {
    flex: 1;
    height: 40px;
    padding: 0 16px;
    border: 1px solid #404040;
    border-radius: 20px 0 0 20px;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
    background-color: #121212;
    color: #ffffff;
}

.search-input:focus {
    border-color: #1a73e8;
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.search-btn {
    height: 40px;
    padding: 0 20px;
    background-color: #303030;
    border: 1px solid #404040;
    border-left: none;
    border-radius: 0 20px 20px 0;
    cursor: pointer;
    color: #909090;
}

.search-btn:hover {
    background-color: #404040;
}

.voice-search-btn {
    margin-left: 8px;
    height: 40px;
    width: 40px;
    border-radius: 50%;
    background-color: #303030;
    border: none;
    cursor: pointer;
    color: #909090;
}

.voice-search-btn:hover {
    background-color: #404040;
}

.header-right {
    display: flex;
    align-items: center;
}

.create-btn {
    display: flex;
    align-items: center;
    background: none;
    border: none;
    padding: 8px 16px;
    margin-right: 16px;
    cursor: pointer;
    color: #909090;
    font-size: 14px;
}

.create-btn i {
    margin-right: 4px;
    font-size: 20px;
}

.notification-btn {
    background: none;
    border: none;
    padding: 8px;
    margin-right: 16px;
    cursor: pointer;
    color: #909090;
    font-size: 20px;
}

.profile-btn {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: #909090;
    font-size: 20px;
}

/* 主内容区 */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* 侧边栏样式 */
.sidebar {
    width: 240px;
    background-color: #000000;
    border-right: 1px solid #303030;
    overflow-y: auto;
    flex-shrink: 0;
    transition: width 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
}

.sidebar.collapsed {
    width: 0;
    transform: translateX(-100%);
    opacity: 0;
    overflow: hidden;
}

.sidebar-nav {
    padding: 12px 0;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px 8px;
    font-size: 14px;
    font-weight: 500;
    color: #606060;
    text-transform: uppercase;
}

.nav-btn {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 8px 24px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 14px;
    color: #ffffff;
    transition: background-color 0.2s ease;
}

.nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-btn.active {
    background-color: rgba(255, 255, 255, 0.15);
    font-weight: 500;
}

.nav-btn i {
    margin-right: 16px;
    font-size: 20px;
    width: 24px;
}

.subscriptions-list {
    padding: 0 12px;
}

.subscription-item {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 8px;
    transition: background-color 0.2s ease;
}

.subscription-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.subscription-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: 12px;
    background-color: #e0e0e0;
    overflow: hidden;
}

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

.subscription-name {
    font-size: 14px;
    color: #ffffff;
}

.sidebar-footer {
    padding: 16px 24px;
    font-size: 12px;
    color: #909090;
    border-top: 1px solid #303030;
}

/* 视频内容区 */
.video-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background-color: #121212;
}

/* 板块按钮 */
.category-buttons {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.category-btn {
    padding: 8px 16px;
    background-color: #303030;
    border: 1px solid #404040;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #ffffff;
    transition: all 0.2s ease;
}

.category-btn:hover {
    background-color: #404040;
}

.category-btn.active {
    background-color: #ffffff;
    color: #121212;
    border-color: #ffffff;
}

/* 视频网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(550px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

/* 视频卡片 */
.video-card {
    background-color: #202020;
    border-radius: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
    position: static;
}

.video-thumbnail {
    overflow: hidden;
    border-radius: 12px 12px 0 0;
}

.video-menu {
    position: relative;
    z-index: 100;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 比例 */
    background-color: #303030;
}

.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 4px;
}

.video-info {
    display: flex;
    padding: 16px;
}

.video-channel-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    margin-right: 16px;
    background-color: #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-img {
    font-size: 20px;
    color: #666;
}

.video-details {
    flex: 1;
    min-width: 0;
}

.video-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #ffffff;
}

.video-meta {
    font-size: 14px;
    color: #909090;
    line-height: 1.4;
}

.video-channel {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
  display: flex;
    gap: 8px;
}

.video-menu {
    position: relative;
}

.menu-toggle {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: #909090;
    font-size: 16px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.video-card:hover .menu-toggle {
    opacity: 1;
}

.menu-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: #202020;
    border: 1px solid #303030;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    padding: 8px 0;
    min-width: 200px;
    z-index: 1000;
    display: none;
}

.menu-dropdown.show {
    display: block;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    color: #ffffff;
    transition: background-color 0.2s ease;
}

.menu-item:hover {
    background-color: #303030;
}

.menu-item i {
    margin-right: 12px;
    font-size: 16px;
    color: #909090;
}

/* Shorts 部分 */
.shorts-section {
    margin-top: 48px;
}

.shorts-section h3 {
    font-size: 25px;
    font-weight: 500;
    margin-bottom: 16px;
    color: #ffffff;
}

.shorts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(450px, 1fr));
    gap: 20px;
}

/* Shorts 卡片 */
.shorts-card {
    position: relative;
    width: 100%;
    padding-top: 177.78%; /* 9:16 比例 */
    background-color: #303030;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.shorts-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.shorts-thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

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

.shorts-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
}

.shorts-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.shorts-stats {
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.shorts-stats i {
    margin-right: 4px;
}

/* 搜索结果弹窗 */
.search-results {
    position: fixed;
    top: 56px;
    left: 50%;
    transform: translateX(-55%);
    width: 100%;
    max-width: 640px;
    background-color: #202020;
    border-bottom: 1px solid #303030;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 99;
    max-height: 80vh;
    overflow-y: auto;
}

.search-results-content {
    padding: 16px;
}

.search-result-item {
    display: flex;
    align-items: flex-start;
    padding: 12px;
    cursor: pointer;
    border-radius: 8px;
    transition: background-color 0.2s ease;
    margin-bottom: 8px;
}

.search-result-item:hover {
    background-color: #303030;
}

.search-result-thumbnail {
    width: 120px;
    height: 68px;
    border-radius: 8px;
    margin-right: 16px;
    background-color: #303030;
    flex-shrink: 0;
}

.search-result-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.search-result-details {
    flex: 1;
    min-width: 0;
}

.search-result-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
    color: #ffffff;
}

.search-result-channel {
    font-size: 12px;
    color: #909090;
    margin-bottom: 2px;
}

.search-result-stats {
    font-size: 12px;
    color: #909090;
}

.highlight {
    background-color: #3d3d29;
    font-weight: 500;
    color: #ffffff;
}

/* 响应式设计 */
@media (max-width: 1600px) {
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
        gap: 24px;
    }
}

@media (max-width: 1200px) {
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 992px) {
    .sidebar {
        width: 200px;
    }
    
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .header-center {
        margin: 0 16px;
    }
    
    .create-btn span {
        display: none;
    }
    
    .video-content {
        padding: 16px;
    }
    
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 12px;
    }
    
    .shorts-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 12px;
    }
}

@media (max-width: 576px) {
    .header-center {
        display: none;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .shorts-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 滚动条样式 - Webkit浏览器 */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background-color: #000000;
}

::-webkit-scrollbar-thumb {
    background-color: #000000;
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: #000000;
}