* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-dark: #0a2e3d;
            --primary-color: #1a5276;
            --secondary-color: #f39c12;
            --accent-color: #e74c3c;
            --light-color: #f8f9fa;
            --dark-color: #2c3e50;
            --text-color: #333;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            background-color: #f5f7fa;
            color: var(--text-color);
            line-height: 1.7;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
        }
        .logo i {
            color: var(--secondary-color);
            margin-right: 10px;
            font-size: 2rem;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 1.5rem;
        }
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        nav ul li a:hover, nav ul li a.active {
            background-color: rgba(255,255,255,0.15);
            color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e8f4fc;
            padding: 0.8rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid #d1e7f5;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb li a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: #777;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        .article-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .article-content h1 {
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
            font-size: 2.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 0.5rem;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #ddd;
            color: #666;
            font-size: 0.9rem;
        }
        .article-meta span i {
            margin-right: 5px;
            color: var(--secondary-color);
        }
        .featured-image {
            width: 100%;
            margin-bottom: 2rem;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .featured-image img:hover {
            transform: scale(1.03);
        }
        .article-content h2 {
            color: var(--primary-color);
            margin: 2.5rem 0 1.2rem;
            font-size: 1.8rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eaeaea;
        }
        .article-content h3 {
            color: var(--dark-color);
            margin: 2rem 0 1rem;
            font-size: 1.4rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.05rem;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box {
            background-color: #e8f7ff;
            border: 1px solid #aed6f1;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 8px;
        }
        .tip-box h4 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
        }
        .tip-box h4 i {
            margin-right: 10px;
            color: var(--accent-color);
        }
        .article-content ul, .article-content ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }
        .stats-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        .stats-table th, .stats-table td {
            border: 1px solid #ddd;
            padding: 12px 15px;
            text-align: left;
        }
        .stats-table th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        .stats-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .stats-table tr:hover {
            background-color: #f1f9ff;
        }
        .interactive-section {
            background: linear-gradient(145deg, #f0f8ff, #e6f0fa);
            padding: 2rem;
            border-radius: 10px;
            margin: 2.5rem 0;
            text-align: center;
        }
        .interactive-section h3 {
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
        }
        .rating-box {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .stars {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .stars .fas {
            color: var(--secondary-color);
        }
        .search-box, .comment-form, .rating-form {
            margin-top: 2rem;
            padding: 1.5rem;
            background-color: #f8fafc;
            border-radius: 10px;
            border: 1px solid #e2e8f0;
        }
        .search-box h3, .comment-form h3, .rating-form h3 {
            margin-bottom: 1rem;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }
        .search-box h3 i, .comment-form h3 i, .rating-form h3 i {
            margin-right: 10px;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #555;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 82, 118, 0.1);
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 0.8rem 1.8rem;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn:hover {
            background: linear-gradient(to right, var(--primary-dark), #083045);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .btn-secondary {
            background: linear-gradient(to right, var(--secondary-color), #e67e22);
        }
        .btn-secondary:hover {
            background: linear-gradient(to right, #e67e22, #d35400);
        }
        sidebar {
            align-self: start;
        }
        .sidebar-widget {
            background-color: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            color: var(--primary-color);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #f0f0f0;
            font-size: 1.3rem;
        }
        .popular-links ul {
            list-style: none;
        }
        .popular-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #eee;
        }
        .popular-links li:last-child {
            border-bottom: none;
        }
        .popular-links a {
            color: var(--dark-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        .popular-links a:hover {
            color: var(--primary-color);
            transform: translateX(5px);
        }
        .popular-links i {
            margin-right: 10px;
            color: var(--secondary-color);
            font-size: 0.9rem;
        }
        .download-box {
            text-align: center;
            background: linear-gradient(145deg, #1a5276, #0a2e3d);
            color: white;
            padding: 2rem 1.5rem;
            border-radius: 10px;
        }
        .download-box h3 {
            color: white;
            border-bottom: none;
            margin-bottom: 1rem;
        }
        .download-box p {
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
            opacity: 0.9;
        }
        .btn-download {
            background-color: var(--secondary-color);
            color: #333;
            font-weight: 700;
        }
        .btn-download:hover {
            background-color: #f1c40f;
            color: #000;
        }
        .footer-links {
            background-color: #2c3e50;
            padding: 3rem 0 2rem;
            margin-top: 3rem;
        }
        .footer-links .container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .web-link {
            background-color: #34495e;
            padding: 1.2rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: #3d566e;
            transform: translateY(-5px);
        }
        .web-link a {
            color: #ecf0f1;
            text-decoration: none;
            font-weight: 600;
            display: block;
        }
        .web-link a:hover {
            color: var(--secondary-color);
        }
        footer {
            background-color: var(--primary-dark);
            color: #ccc;
            padding: 2.5rem 0;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .social-links {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
        }
        .social-links a {
            color: #ccc;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--secondary-color);
            transform: scale(1.2);
        }
        .copyright {
            font-size: 0.9rem;
            color: #999;
            border-top: 1px solid #3a5066;
            padding-top: 1.5rem;
            width: 100%;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .article-content h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 1rem;
                background-color: var(--primary-dark);
                border-radius: 8px;
                padding: 1rem;
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                margin: 0.5rem 0;
                width: 100%;
            }
            nav ul li a {
                display: block;
                padding: 0.8rem;
            }
            .hamburger {
                display: block;
            }
            .article-content {
                padding: 1.5rem;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }
            .rating-box {
                flex-direction: column;
            }
        }