:root {
            --primary-color: #1a4b8c;
            --secondary-color: #e63946;
            --accent-color: #2a9d8f;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: var(--dark-text);
            line-height: 1.6;
        }
        
        /* Header Styles */
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        
        .navbar-brand i {
            color: var(--secondary-color);
        }
        
        .nav-link {
            font-weight: 500;
            margin: 0 5px;
        }
        
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        
        .search-box {
            max-width: 300px;
        }
        
        .login-btn {
            background-color: var(--primary-color);
            color: white;
            border-radius: 4px;
            padding: 6px 20px !important;
            margin-left: 10px;
        }
        
        .login-btn:hover {
            background-color: #0d3a73;
            color: white;
        }
        
        /* Hero Section */
        .hero-section {
            background: linear-gradient(rgba(26, 75, 140, 0.85), rgba(26, 75, 140, 0.9)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 80px 0;
            margin-bottom: 40px;
        }
        
        /* Section Titles */
        .section-title {
            color: var(--primary-color);
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 30px;
            font-weight: 700;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background-color: var(--secondary-color);
        }
        
        /* Article List */
        .article-item {
            margin-bottom: 30px;
            border-bottom: 1px solid #eaeaea;
            padding-bottom: 20px;
            transition: transform 0.3s;
        }
        
        .article-item:hover {
            transform: translateY(-5px);
        }
        
        .article-img {
            width: 150px;
            height: 120px;
            object-fit: cover;
            border-radius: 5px;
        }
        
        .article-title {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 8px;
            font-size: 1.2rem;
        }
        
        .article-title a {
            color: inherit;
            text-decoration: none;
        }
        
        .article-title a:hover {
            color: var(--secondary-color);
        }
        
        .article-meta {
            color: #6c757d;
            font-size: 0.9rem;
        }
        
        .article-meta i {
            margin-right: 5px;
        }
        
        /* Video List */
        .video-card {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s;
            height: 100%;
        }
        
        .video-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
        }
        
        .video-thumbnail {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        
        .video-title {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 10px;
            font-size: 1.1rem;
        }
        
        .video-meta {
            color: #6c757d;
            font-size: 0.85rem;
        }
        
        .play-btn {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: rgba(36, 36, 36, 0.85);
            color: white;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        /* Footer */
        .footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 50px 0 20px;
            margin-top: 50px;
        }
        
        .footer-title {
            color: white;
            font-weight: 600;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        
        .footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            display: block;
            margin-bottom: 10px;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .copyright {
            border-top: 1px solid #34495e;
            padding-top: 20px;
            margin-top: 30px;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        
        /* Responsive adjustments */
        @media (max-width: 768px) {
            .article-img {
                width: 100%;
                height: 180px;
                margin-bottom: 15px;
            }
            
            .search-box {
                margin-top: 15px;
                max-width: 100%;
            }
            
            .login-btn {
                margin-left: 0;
                margin-top: 10px;
            }
        }
         /* Page Header */
        .page-header {
            background-color: var(--light-bg);
            padding: 40px 0;
            margin-bottom: 10px;
            border-bottom: 1px solid #dee2e6;
        }
        
        .page-title {
            color: var(--primary-color);
            font-weight: 700;
            margin-bottom: 10px;
        }
        
        .page-subtitle {
            color: #6c757d;
            font-size: 1.1rem;
        }
          /* Breadcrumb */
        .breadcrumb {
            background-color: transparent;
            padding: 20px 0;
            margin-bottom: 0;
        }
        
        .breadcrumb-item a {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .breadcrumb-item.active {
            color: #6c757d;
        }
         /* Pagination */
        .pagination-container {
            margin-top: 50px;
            margin-bottom: 30px;
        }
        
        .page-link {
            color: var(--primary-color);
            border: 1px solid #dee2e6;
            padding: 8px 16px;
        }
        
        .page-link:hover {
            color: white;
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        
        .page-item.active .page-link {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        
        .page-item.disabled .page-link {
            color: #6c757d;
        }

        /* Sidebar */
        .sidebar {
            background-color: var(--light-bg);
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 30px;
        }
        
        .sidebar-title {
            color: var(--primary-color);
            font-weight: 600;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary-color);
        }
        
        .sidebar-list {
            list-style: none;
            padding: 0;
        }
        
        .sidebar-list li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dashed #dee2e6;
        }
        
        .sidebar-list a {
            color: #495057;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .sidebar-list a:hover {
            color: var(--primary-color);
        }
        
        .sidebar-list .badge {
            background-color: var(--accent-color);
            font-size: 0.7rem;
            margin-left: 5px;
        }

        .toc-list {
            list-style: none;
            padding-left: 0;
        }
        
        .toc-list li {
            margin-bottom: 8px;
            padding-left: 15px;
            position: relative;
        }
        
        .toc-list li:before {
            content: "•";
            color: var(--primary-color);
            position: absolute;
            left: 0;
        }
        
        .toc-list a {
            color: #495057;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .toc-list a:hover {
            color: var(--primary-color);
        }
        .popular-article {
            display: flex;
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eaeaea;
        }
        
        .popular-img {
            width: 80px;
            height: 60px;
            object-fit: cover;
            border-radius: 4px;
            margin-right: 15px;
        }
        
        .popular-title {
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 5px;
        }
        
        .popular-title a {
            color: var(--dark-text);
            text-decoration: none;
        }
        
        .popular-title a:hover {
            color: var(--primary-color);
        }

           /* Article Header */
        .article-header {
            margin-bottom: 30px;
        }
        
        .article-title {
            color: var(--primary-color);
            font-weight: 700;
            margin-bottom: 15px;
            font-size: 2.2rem;
        }
        
        .article-meta {
            color: #6c757d;
            font-size: 0.95rem;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eaeaea;
        }
        
        .article-meta i {
            margin-right: 5px;
        }
        
        .article-category {
            background-color: var(--primary-color);
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-right: 15px;
        }
        
        /* Article Content */
        .article-content {
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .article-content h2 {
            color: var(--primary-color);
            margin-top: 40px;
            margin-bottom: 20px;
            font-weight: 600;
            font-size: 1.8rem;
        }
        
        .article-content h3 {
            color: var(--primary-color);
            margin-top: 30px;
            margin-bottom: 15px;
            font-weight: 600;
            font-size: 1.5rem;
        }
        
        .article-content p {
            margin-bottom: 20px;
        }
        
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 30px 0;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        
        .article-content blockquote {
            border-left: 4px solid var(--accent-color);
            padding: 15px 20px;
            margin: 30px 0;
            background-color: var(--light-bg);
            font-style: italic;
            font-size: 1.2rem;
        }
        
        .article-content ul, .article-content ol {
            margin-bottom: 20px;
            padding-left: 20px;
        }
        
        .article-content li {
            margin-bottom: 10px;
        }
        
        .article-featured-image {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: 8px;
            margin-bottom: 30px;
        }
        /* Comments Section */
        .comments-section {
            margin: 50px 0;
        }
        
        .comment-form {
            background-color: var(--light-bg);
            border-radius: 8px;
            padding: 25px;
            margin-bottom: 30px;
        }
        
        .comment-item {
            margin-bottom: 25px;
            padding-bottom: 25px;
            border-bottom: 1px solid #eaeaea;
        }
        
        .comment-author-img {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 15px;
        }
        
        .comment-author {
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 5px;
        }
        
        .comment-date {
            color: #6c757d;
            font-size: 0.85rem;
        }
        
        .comment-content {
            margin-top: 10px;
            color: #495057;
        }