:root {
    --header-height: 60px;
    --transition-speed: 0.3s;
    --accent-light: #0d6efd;
    --text-secondary: #666;
    --card-bg: var(--card-light);
    --card-light: #ffffff;
    --card-dark: #343a40;
    --border-color: rgba(0, 0, 0, 0.1);
    --tag-bg: var(--hover-light);
    --hover-light: #e9ecef;
    --hover-dark: #495057;
}

.dark-mode {
    --card-bg: var(--card-dark);
    --text-secondary: #999;
    --border-color: rgba(255, 255, 255, 0.1);
    --tag-bg: var(--hover-dark);
}

/* Video Page Layout */
.breadcrumb {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin: calc(var(--header-height) + 1rem) auto 1.5rem;
    font-size: 0.9rem;
    padding: 0 20px;
    max-width: 1400px;
}

.breadcrumb a {
    color: var(--accent-light);
    text-decoration: none;
    transition: all var(--transition-speed);
    font-weight: 500;
}

.breadcrumb a:hover {
    opacity: 0.8;
    transform: translateX(-2px);
}

.breadcrumb span {
    color: var(--text-secondary);
}

.content-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 400px;
    gap: 2rem;
    align-items: start;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.video-container {
    position: relative;
    width: 100%;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding-top: 56.25%;
}

.video-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Video Details */
.video-details {
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.video-title {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.3;
}

.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Tags */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.tag {
    background: var(--hover-light);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-speed);
    font-weight: 500;
}

.tag:hover {
    background: var(--accent-light);
    color: white;
    transform: translateY(-2px);
}

.dark-mode .tag {
    background: var(--hover-dark);
}

/* Sidebar */
.related-videos {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    position: sticky;
    top: calc(var(--header-height) + 2rem);
}

.related-videos-content {
    padding: 1.5rem;
}

.related-videos-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.related-videos-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Ad Container */
.ad-container {
    background: var(--card-bg);
    padding: 1rem;
    position: relative;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.ad-container:last-child {
    margin-bottom: 0;
}

.ad-label {
    position: absolute;
    top: 8px;
    left: 8px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Related Videos Grid */
.more-related-videos {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
}

.more-related-videos-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.video-grid .related-video-card {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 0;
}

.video-grid .related-thumbnail {
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    position: relative;
}

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

.video-grid .related-info {
    padding: 0.5rem 0.25rem;
}

.video-grid .related-info h3 {
    margin-bottom: 0.5rem;
}

/* Related Video Card */
.related-video-card {
    display: flex;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background-color var(--transition-speed);
}

.related-video-card:hover {
    background: var(--hover-light);
}

.dark-mode .related-video-card:hover {
    background: var(--hover-dark);
}

.related-thumbnail {
    position: relative;
    width: 168px;
    height: 94px;
    border-radius: 12px;
    overflow: hidden;
    flex-shrink: 0;
    background: var(--hover-light);
}

.dark-mode .related-thumbnail {
    background: var(--hover-dark);
}

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

.related-duration {
    position: absolute;
    bottom: 4px;
    right: 4px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 3px 4px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.2px;
}

.related-info {
    flex: 1;
    min-width: 0;
    padding-top: 2px;
}

.related-info h3 {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: inherit;
}

.related-meta {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .content-wrapper {
        gap: 1.5rem;
    }

    .video-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .related-videos {
        position: static;
    }

    .related-videos-list {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .breadcrumb {
        margin-bottom: 1rem;
    }

    .video-title {
        font-size: 1.4rem;
    }

    .video-details {
        padding: 1.5rem;
    }

    .video-meta {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .related-videos-list {
        grid-template-columns: 1fr;
    }

    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .related-thumbnail {
        width: 140px;
        height: 79px;
    }

    .related-info h3 {
        font-size: 0.875rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .video-grid .related-video-card {
        flex-direction: row;
    }

    .video-grid .related-thumbnail {
        width: 168px;
        height: 94px;
        padding-bottom: 0;
    }
}