* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a365d; 
            --secondary: #c53030; 
            --accent: #f6ad55; 
            --dark: #2d3748;
            --light: #f7fafc;
            --gray: #a0aec0;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --container-max: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background: var(--light);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .site-header {
            background: var(--primary);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 1px;
            background: linear-gradient(90deg, var(--accent), #fff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .nav-primary {
            display: flex;
            gap: 25px;
        }
        .nav-primary a {
            color: white;
            font-weight: 500;
            padding: 5px 0;
            position: relative;
        }
        .nav-primary a:hover {
            color: var(--accent);
        }
        .nav-primary a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }
        .nav-primary a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background: #edf2f7;
            padding: 12px 20px;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin: 0 10px;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--dark);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 20px;
        }
        .content-main {
            background: white;
            padding: 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        h1, h2, h3, h4 {
            color: var(--primary);
            line-height: 1.3;
            margin-top: 1.5em;
            margin-bottom: 0.7em;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 15px;
            margin-top: 0;
        }
        h2 {
            font-size: 2rem;
            padding-left: 15px;
            border-left: 5px solid var(--accent);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--secondary);
        }
        h4 {
            font-size: 1.2rem;
            color: var(--dark);
        }
        .lead {
            font-size: 1.25rem;
            color: var(--primary);
            font-weight: 500;
            margin: 20px 0;
            padding: 15px;
            background: #e6fffa;
            border-left: 4px solid #38b2ac;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
        }
        strong {
            color: var(--secondary);
        }
        em {
            color: var(--primary);
            font-style: italic;
        }
        blockquote {
            border-left: 4px solid var(--accent);
            padding: 15px 20px;
            margin: 25px 0;
            background: #fef3c7;
            font-style: italic;
            color: var(--dark);
        }
        hr {
            border: none;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            margin: 40px 0;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        li strong {
            color: var(--primary);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: var(--shadow);
        }
        .comparison-table th,
        .comparison-table td {
            padding: 15px;
            text-align: left;
            border: 1px solid #ddd;
        }
        .comparison-table thead {
            background: var(--primary);
            color: white;
        }
        .comparison-table tbody tr:nth-child(even) {
            background: #f9f9f9;
        }
        .comparison-table tbody tr:hover {
            background: #e6f7ff;
        }
        .article-img {
            margin: 30px auto;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            max-width: 800px;
        }
        .article-img img {
            transition: transform 0.5s ease;
        }
        .article-img:hover img {
            transform: scale(1.03);
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .widget {
            background: white;
            padding: 20px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: var(--primary);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent);
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid var(--primary);
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background: var(--secondary);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 1.8rem;
            color: #ffd700;
            margin: 10px 0;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .rating-form {
            margin-top: 15px;
        }
        .rating-form select,
        .rating-form button {
            width: 100%;
            padding: 10px;
            margin-top: 10px;
            border-radius: var(--radius);
            border: 1px solid #ccc;
        }
        .rating-form button {
            background: var(--secondary);
            color: white;
            border: none;
            font-weight: bold;
            cursor: pointer;
        }
        .rating-form button:hover {
            background: #9b2c2c;
        }
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 12px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: var(--radius);
            font-family: inherit;
        }
        .comment-form button {
            background: var(--primary);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: var(--radius);
            cursor: pointer;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background: var(--secondary);
        }
        .related-links {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 10px;
            padding: 10px;
            background: #f0f4ff;
            border-left: 3px solid var(--primary);
        }
        .related-links a {
            display: block;
            font-weight: 500;
        }
        .site-footer {
            background: var(--primary);
            color: white;
            padding: 40px 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 15px;
            background: linear-gradient(90deg, var(--accent), #fff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 8px 15px;
            margin: 5px;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-3px);
        }
        .copyright {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.2);
            font-size: 0.9rem;
            color: var(--gray);
        }
        @media (max-width: 992px) {
            .main-wrapper {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: -1;
            }
        }
        @media (max-width: 768px) {
            .nav-primary {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--primary);
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow);
            }
            .nav-primary.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .header-container {
                padding: 12px 20px;
            }
        }
        @media (max-width: 480px) {
            .content-main,
            .widget {
                padding: 20px 15px;
            }
            h1 {
                font-size: 1.8rem;
            }
            .lead {
                font-size: 1.1rem;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(197, 48, 48, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(197, 48, 48, 0); }
            100% { box-shadow: 0 0 0 0 rgba(197, 48, 48, 0); }
        }