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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0f0f0f;
    color: #fff;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background-color: #212121;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 20px;
    font-weight: bold;
}

.logo-icon {
    color: #7c3aed;
    font-size: 28px;
}

.header-center {
    flex: 1;
    max-width: 600px;
    margin: 0 40px;
}

.search-bar {
    display: flex;
    height: 40px;
}

.search-bar input {
    flex: 1;
    padding: 0 16px;
    background-color: #121212;
    border: 1px solid #303030;
    color: #fff;
    font-size: 16px;
    outline: none;
}

.search-bar input:focus {
    border-color: #1c62b9;
}

.search-btn {
    width: 64px;
    background-color: #303030;
    border: 1px solid #303030;
    color: #fff;
    cursor: pointer;
    font-size: 18px;
}

.search-btn:hover {
    background-color: #3f3f3f;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.upload-btn {
    padding: 8px 16px;
    background-color: transparent;
    border: 1px solid #3f3f3f;
    color: #fff;
    cursor: pointer;
    border-radius: 2px;
    font-size: 14px;
}

.upload-btn:hover {
    background-color: #3f3f3f;
}

.user-avatar {
    width: 32px;
    height: 32px;
    background-color: #7c3aed;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* Container */
.container {
    display: flex;
}

/* Sidebar */
.sidebar {
    width: 240px;
    background-color: #212121;
    height: calc(100vh - 56px);
    position: sticky;
    top: 56px;
    overflow-y: auto;
    padding: 12px 0;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.nav-item {
    padding: 12px 24px;
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 24px;
    font-size: 14px;
    transition: background-color 0.2s;
}

.nav-item:hover {
    background-color: #3f3f3f;
}

.nav-item.active {
    background-color: #3f3f3f;
}

/* Content */
.content {
    flex: 1;
    padding: 24px;
}

.filters {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.filter-btn {
    padding: 8px 16px;
    background-color: #272727;
    border: none;
    color: #fff;
    cursor: pointer;
    border-radius: 8px;
    white-space: nowrap;
    font-size: 14px;
}

.filter-btn:hover {
    background-color: #3f3f3f;
}

.filter-btn.active {
    background-color: #fff;
    color: #000;
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.video-card {
    cursor: pointer;
    transition: transform 0.2s;
}

.video-card:hover {
    transform: scale(1.02);
}

.video-thumbnail {
    width: 100%;
    aspect-ratio: 16/9;
    background-color: #3f3f3f;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

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

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

.video-info {
    display: flex;
    gap: 12px;
    margin-top: 12px;
}

.channel-avatar {
    width: 36px;
    height: 36px;
    background-color: #7c3aed;
    border-radius: 50%;
    flex-shrink: 0;
}

.video-details {
    flex: 1;
}

.video-title {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    font-size: 12px;
    color: #aaa;
}

.channel-name {
    margin-bottom: 2px;
}

.video-stats {
    display: flex;
    gap: 4px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #0f0f0f;
}

::-webkit-scrollbar-thumb {
    background: #3f3f3f;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: 72px;
    }
    
    .nav-item {
        justify-content: center;
        font-size: 10px;
        flex-direction: column;
        gap: 4px;
    }
    
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .header-center {
        margin: 0 16px;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
}

/* User menu */
.user-avatar-wrap {
    position: relative;
}

.user-menu {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: #212121;
    border: 1px solid #3f3f3f;
    border-radius: 8px;
    min-width: 180px;
    z-index: 1000;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

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

.user-menu-item {
    padding: 12px 16px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s;
    color: #fff;
}

.user-menu-item:hover {
    background: #3f3f3f;
}

.user-menu-divider {
    height: 1px;
    background: #3f3f3f;
    margin: 4px 0;
}