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

:root {
    --primary-color: #ff0000;
    --bg-primary: #0f0f0f;
    --bg-secondary: #212121;
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --border-color: #3f3f3f;
}

body {
    font-family: 'Roboto', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

.menu-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.2s;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 20px;
    font-weight: bold;
}

.logo i {
    color: var(--primary-color);
    font-size: 28px;
}

.header-center {
    flex: 1;
    max-width: 640px;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 40px;
}

.search-form {
    flex: 1;
    display: flex;
    height: 40px;
}

.search-input {
    flex: 1;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-right: none;
    border-radius: 40px 0 0 40px;
    padding: 0 16px;
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
}

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

.search-btn {
    width: 64px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left: none;
    border-radius: 0 40px 40px 0;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 18px;
}

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

.voice-search-btn {
    width: 40px;
    height: 40px;
    background-color: var(--bg-secondary);
    border: none;
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 18px;
}

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

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-icon {
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    border-radius: 50%;
    transition: background 0.2s;
}

.header-icon:hover {
    background-color: var(--bg-secondary);
}

.user-icon {
    font-size: 24px;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    left: 0;
    top: 56px;
    width: 240px;
    height: calc(100vh - 56px);
    background-color: var(--bg-primary);
    overflow-y: auto;
    padding: 12px 0;
    z-index: 900;
}

.sidebar-section {
    padding: 8px 0;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 10px 24px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s;
}

.sidebar-item:hover {
    background-color: var(--bg-secondary);
}

.sidebar-item.active {
    background-color: var(--bg-secondary);
}

.sidebar-item i {
    font-size: 20px;
    width: 24px;
}

.sidebar-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 12px 0;
}

/* Main Content */
.main-content {
    margin-left: 240px;
    margin-top: 56px;
    padding: 24px;
    min-height: calc(100vh - 56px);
    padding-bottom: 100px;
}

/* Category Pills */
.category-pills {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.category-pills::-webkit-scrollbar {
    height: 8px;
}

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

.pill {
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    border: none;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s;
}

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

.pill.active {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}

/* Ad Container Styles */
.ad-container {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 24px;
    text-align: center;
}

.ad-label {
    display: inline-block;
    background-color: #ffcc00;
    color: #000;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: bold;
    margin-bottom: 8px;
}

.ad-placeholder {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    padding: 40px;
    color: white;
}

.ad-placeholder p {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 8px;
}

.ad-placeholder small {
    font-size: 12px;
    opacity: 0.8;
}

.ad-placeholder.small {
    padding: 20px;
}

/* Videos Grid */
.videos-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-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
}

.video-thumbnail {
    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;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

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

.channel-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    flex-shrink: 0;
}

.video-info-text {
    flex: 1;
}

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

.channel-name, .video-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

.video-meta {
    margin-top: 2px;
}

/* Loading Indicator */
.loading-indicator {
    text-align: center;
    padding: 40px;
    display: none;
}

.loading-indicator.active {
    display: block;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer Sticky Ad */
.footer-sticky-ad {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 12px;
    z-index: 999;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
}

.ad-close {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
}

.ad-close:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

/* Video Page Styles */
.video-page-container {
    display: flex;
    gap: 24px;
    margin-left: 0;
    margin-top: 56px;
    padding: 24px;
    max-width: 1750px;
    margin: 56px auto 0;
}

.video-main-section {
    flex: 1;
    max-width: 1200px;
}

.video-player-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    background-color: #000;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 16px;
}

#videoPlayer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Mid-roll Ad Overlay */
.midroll-ad-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.midroll-ad-overlay.active {
    display: flex;
}

.midroll-ad-content {
    text-align: center;
}

.ad-timer {
    background-color: #ffcc00;
    color: #000;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: bold;
    margin-bottom: 20px;
    display: inline-block;
}

.ad-display {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 40px;
    border-radius: 12px;
    color: white;
}

.ad-display h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.ad-display p {
    font-size: 16px;
    opacity: 0.9;
}

/* Video Info */
.video-info {
    margin-bottom: 16px;
}

.video-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.3;
}

.video-stats-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.video-stats {
    color: var(--text-secondary);
    font-size: 14px;
}

.video-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-secondary);
    border: none;
    border-radius: 24px;
    padding: 10px 16px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
}

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

.action-btn i {
    font-size: 18px;
}

/* Channel Info */
.channel-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 16px;
}

.channel-details {
    display: flex;
    align-items: center;
    gap: 16px;
}

.channel-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.channel-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.channel-subs {
    font-size: 12px;
    color: var(--text-secondary);
}

.subscribe-btn {
    background-color: var(--primary-color);
    border: none;
    border-radius: 24px;
    padding: 10px 20px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
}

.subscribe-btn:hover {
    background-color: #cc0000;
}

.video-description {
    background-color: var(--bg-secondary);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 14px;
    line-height: 1.6;
}

/* Comments Section */
.comments-section {
    margin-top: 24px;
}

.comments-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.comments-header h3 {
    font-size: 18px;
}

.sort-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}

.comment-input-container {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
}

.comment-input {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 8px 0;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

.comment-input:focus {
    border-bottom-color: var(--text-primary);
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.comment {
    display: flex;
    gap: 16px;
}

.comment-content {
    flex: 1;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.comment-author {
    font-size: 13px;
    font-weight: 600;
}

.comment-date {
    font-size: 12px;
    color: var(--text-secondary);
}

.comment-text {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 8px;
}

.comment-actions {
    display: flex;
    gap: 16px;
}

.comment-action-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s;
}

.comment-action-btn:hover {
    color: var(--text-primary);
}

/* Related Videos Sidebar */
.related-videos-sidebar {
    width: 402px;
    flex-shrink: 0;
}

.related-videos-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.related-video-card {
    display: flex;
    gap: 8px;
    cursor: pointer;
    border-radius: 8px;
    padding: 4px;
    transition: background 0.2s;
}

.related-video-card:hover {
    background-color: var(--bg-secondary);
}

.related-thumbnail-container {
    position: relative;
    width: 168px;
    height: 94px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
}

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

.related-video-info {
    flex: 1;
    padding: 4px 0;
}

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

.related-channel-name {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.related-video-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Ad spacing in related videos */
.related-ad {
    margin: 8px 0;
    padding: 12px;
}

/* Responsive Design */
@media (max-width: 1300px) {
    .video-page-container {
        flex-direction: column;
    }
    
    .related-videos-sidebar {
        width: 100%;
        max-width: 1200px;
    }
    
    .related-videos-container {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 16px;
    }
    
    .related-video-card {
        flex-direction: column;
    }
    
    .related-thumbnail-container {
        width: 100%;
        height: auto;
        padding-top: 56.25%;
        position: relative;
    }
    
    .related-thumbnail {
        position: absolute;
        top: 0;
        left: 0;
    }
}

@media (max-width: 1024px) {
    .main-content {
        margin-left: 0;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
}

@media (max-width: 768px) {
    .header-center {
        margin: 0 16px;
    }
    
    .videos-grid {
        grid-template-columns: 1fr;
    }
    
    .video-page-container {
        padding: 12px;
    }
    
    .video-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .action-btn span {
        display: none;
    }
    
    .action-btn {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .header-center {
        display: none;
    }
    
    .category-pills {
        gap: 8px;
    }
    
    .pill {
        padding: 6px 12px;
        font-size: 12px;
    }
}