:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f9fafb;
            --border-color: #e5e7eb;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --radius: 0.5rem;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow-md);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo a:hover {
            color: var(--secondary-color);
        }
        .logo i {
            color: var(--accent-color);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            position: relative;
        }
        nav a:hover {
            color: var(--secondary-color);
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--primary-color);
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f1f5f9;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: var(--text-light);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
        }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        article {
            background-color: white;
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow-sm);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--text-dark);
            margin: 1.5rem 0 0.75rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--text-dark);
            background-color: #eff6ff;
            padding: 1rem;
            border-left: 4px solid var(--primary-color);
            border-radius: 0 0.5rem 0.5rem 0;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 0.25rem 0.5rem;
            border-radius: 0.25rem;
            font-weight: 600;
        }
        a.keyword-link {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 600;
        }
        a.keyword-link:hover {
            text-decoration: underline;
        }
        .img-container {
            margin: 2rem 0;
            text-align: center;
        }
        .img-container img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            transition: var(--transition);
        }
        .img-container img:hover {
            transform: scale(1.01);
        }
        .caption {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 0.5rem;
            font-style: italic;
        }
        .groups-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: var(--shadow-sm);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .groups-table th {
            background-color: var(--primary-color);
            color: white;
            padding: 1rem;
            text-align: left;
        }
        .groups-table td {
            padding: 0.75rem 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        .groups-table tr:nth-child(even) {
            background-color: #f8fafc;
        }
        .groups-table tr:hover {
            background-color: #f0f9ff;
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            color: var(--primary-color);
            font-size: 1.3rem;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius) 0 0 var(--radius);
            outline: none;
            transition: var(--transition);
        }
        .search-form input:focus {
            border-color: var(--primary-color);
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.25rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--secondary-color);
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.75rem;
        }
        .related-links a {
            color: var(--text-dark);
            text-decoration: none;
            display: block;
            padding: 0.5rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .related-links a:hover {
            background-color: #eff6ff;
            color: var(--primary-color);
            padding-left: 1rem;
        }
        .rating-widget .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .stars i {
            color: #d1d5db;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .stars i:hover,
        .stars i.active {
            color: var(--accent-color);
        }
        .rating-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            width: 100%;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: var(--secondary-color);
        }
        .comment-section {
            margin-top: 3rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            margin-bottom: 1rem;
            resize: vertical;
            min-height: 120px;
            outline: none;
            transition: var(--transition);
        }
        .comment-form textarea:focus {
            border-color: var(--primary-color);
        }
        .comment-form .form-row {
            display: flex;
            gap: 1rem;
            margin-bottom: 1rem;
        }
        .comment-form input {
            flex-grow: 1;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            outline: none;
            transition: var(--transition);
        }
        .comment-form input:focus {
            border-color: var(--primary-color);
        }
        .comment-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background-color: var(--secondary-color);
        }
        .comment-list {
            margin-top: 2rem;
        }
        .comment {
            background-color: white;
            border-radius: var(--radius);
            padding: 1.5rem;
            margin-bottom: 1rem;
            box-shadow: var(--shadow-sm);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.75rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .comment-author {
            font-weight: 600;
            color: var(--primary-color);
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: white;
        }
        .footer-links h4 {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: var(--accent-color);
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: #dbeafe;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            text-decoration: underline;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.1);
            padding: 1rem;
            border-radius: var(--radius);
            margin: 1.5rem 0;
        }
        friend-link a {
            color: var(--accent-color);
            font-weight: 600;
            text-decoration: none;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.2);
            font-size: 0.9rem;
            color: #dbeafe;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 768px) {
            nav ul {
                position: fixed;
                top: 70px;
                left: -100%;
                flex-direction: column;
                background-color: white;
                width: 100%;
                padding: 2rem;
                box-shadow: var(--shadow-lg);
                transition: var(--transition);
                z-index: 99;
            }
            nav ul.active {
                left: 0;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                padding: 1rem 0;
            }
            .comment-form .form-row {
                flex-direction: column;
                gap: 0;
            }
            .comment-form input {
                margin-bottom: 1rem;
            }
        }