:root {
            --primary-dark: #1a2a3a;
            --primary-blue: #2a4a6a;
            --accent-orange: #e67e22;
            --accent-green: #27ae60;
            --light-gray: #ecf0f1;
            --dark-gray: #2c3e50;
            --text-light: #f5f7fa;
            --text-dark: #333;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--primary-blue);
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-orange);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
            color: var(--text-light);
            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 {
            font-size: 1.8rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo a {
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent-orange);
        }
        .logo a:hover {
            color: var(--accent-orange);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-links a {
            color: var(--text-light);
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0.3rem;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-orange);
            border-bottom-color: var(--accent-orange);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light-gray);
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: var(--primary-blue);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #777;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .content {
            background-color: white;
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: white;
            padding: 1.8rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent-orange);
            padding-bottom: 0.7rem;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-blue);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #eee;
        }
        h3 {
            font-size: 1.4rem;
            color: var(--dark-gray);
            margin: 1.8rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.1rem;
            font-weight: 500;
            background: linear-gradient(to right, #f8f9fa, #e9ecef);
            padding: 1.5rem;
            border-left: 5px solid var(--accent-green);
            border-radius: 5px;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #f1c40f;
            margin: 1.8rem 0;
        }
        .tip {
            background-color: #e8f4fd;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #3498db;
            margin: 1.8rem 0;
        }
        .warning {
            background-color: #fdeaea;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #e74c3c;
            margin: 1.8rem 0;
        }
        b, strong {
            color: var(--primary-dark);
        }
        ul, ol {
            margin-left: 1.8rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.7rem;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-img:hover {
            transform: scale(1.01);
        }
        figcaption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        th, td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        th {
            background-color: var(--primary-blue);
            color: white;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        tr:hover {
            background-color: #e3f2fd;
        }
        .form-section {
            background-color: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
            border: 1px solid #dee2e6;
        }
        .form-title {
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark-gray);
        }
        input, select, textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(42, 74, 106, 0.2);
        }
        button {
            background: linear-gradient(to right, var(--primary-blue), var(--primary-dark));
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        button:hover {
            background: linear-gradient(to right, var(--accent-orange), #d35400);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 1rem 0;
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .star {
            color: #ddd;
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #f39c12;
        }
        .sidebar h3 {
            color: var(--primary-dark);
            margin-top: 0;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--accent-orange);
        }
        .sidebar ul {
            list-style: none;
            margin-left: 0;
        }
        .sidebar li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #eee;
        }
        .sidebar a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--dark-gray);
        }
        .sidebar a:hover {
            color: var(--accent-orange);
        }
        .popular-articles li a:before {
            content: "🔫";
            font-size: 0.9rem;
        }
        .footer-links {
            background-color: var(--light-gray);
            padding: 2.5rem 0;
            margin-top: 3rem;
            border-top: 1px solid #ddd;
            border-bottom: 1px solid #ddd;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: white;
            padding: 1.2rem;
            border-radius: 8px;
            box-shadow: 0 3px 8px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 15px rgba(0,0,0,0.1);
        }
        .web-link a {
            color: var(--primary-dark);
            font-weight: 600;
            display: block;
        }
        .web-link a:hover {
            color: var(--accent-orange);
        }
        footer {
            background-color: var(--primary-dark);
            color: var(--text-light);
            padding: 2.5rem 0 1.5rem;
        }
        .footer-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1.5rem;
        }
        .copyright {
            font-size: 0.9rem;
            color: #bbb;
        }
        .social-links {
            display: flex;
            gap: 1.2rem;
        }
        .social-links a {
            color: var(--text-light);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--accent-orange);
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background-color: var(--primary-dark);
                width: 80%;
                max-width: 300px;
                height: calc(100vh - 70px);
                padding: 2rem;
                transition: 0.5s;
                box-shadow: -5px 0 15px rgba(0,0,0,0.2);
                z-index: 999;
            }
            .nav-links.active {
                right: 0;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .content, .sidebar {
                padding: 1.5rem;
            }
            .form-section {
                padding: 1.5rem;
            }
            .footer-container {
                flex-direction: column;
                text-align: center;
            }
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .separator {
            height: 2px;
            background: linear-gradient(to right, transparent, var(--accent-orange), transparent);
            margin: 2.5rem 0;
        }
        .tag {
            display: inline-block;
            background-color: #e3f2fd;
            color: var(--primary-blue);
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }