:root {
            --primary-color: #1a237e;
            --secondary-color: #ff6f00;
            --accent-color: #00acc1;
            --light-bg: #f5f5f5;
            --dark-bg: #121212;
            --text-color: #333;
            --text-light: #fff;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --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: 1.6;
            color: var(--text-color);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-color);
            color: var(--text-light);
            padding: 15px 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--secondary-color);
            text-transform: uppercase;
            letter-spacing: 2px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--text-light);
            transform: scale(1.05);
        }
        .nav-container {
            display: flex;
            align-items: center;
            gap: 30px;
        }
        .main-nav ul {
            display: flex;
            gap: 25px;
        }
        .main-nav a {
            font-weight: 600;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .main-nav a:hover {
            background-color: var(--secondary-color);
            color: var(--primary-color);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            padding: 10px 15px;
            border: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            width: 220px;
        }
        .search-form button {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 10px 15px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            padding: 10px 0;
            background-color: rgba(255,255,255,0.1);
            margin-top: 10px;
            border-radius: var(--border-radius);
        }
        .breadcrumb ul {
            display: flex;
            gap: 10px;
            font-size: 0.9rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 10px;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 0;
        }
        .article-content {
            background-color: white;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 10px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 25px 0 15px;
            padding-left: 10px;
            border-left: 5px solid var(--accent-color);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--secondary-color);
            margin: 20px 0 10px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--accent-color);
            margin: 15px 0 8px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
            line-height: 1.8;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 15px;
            border-left: 4px solid var(--secondary-color);
            margin: 20px 0;
            font-weight: 600;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 25px 0;
            box-shadow: var(--shadow);
        }
        .interactive-section {
            background-color: var(--light-bg);
            padding: 25px;
            border-radius: var(--border-radius);
            margin: 30px 0;
        }
        .interactive-section h3 {
            color: var(--primary-color);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: bold;
            transition: var(--transition);
            display: inline-block;
        }
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .rating {
            display: flex;
            gap: 10px;
            align-items: center;
            margin: 15px 0;
        }
        .rating input[type="radio"] {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating input[type="radio"]:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: var(--secondary-color);
        }
        aside {
            background-color: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            height: fit-content;
        }
        aside h3 {
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-bg);
        }
        .related-links li {
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px dashed #eee;
        }
        .related-links a {
            display: block;
            padding: 10px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .related-links a:hover {
            background-color: var(--light-bg);
            color: var(--primary-color);
            padding-left: 15px;
        }
        footer {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h4 {
            color: var(--secondary-color);
            margin-bottom: 20px;
            font-size: 1.4rem;
        }
        friend-link {
            display: block;
            padding: 10px;
            background-color: rgba(255,255,255,0.05);
            margin-bottom: 10px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255,111,0,0.2);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            .nav-container {
                gap: 20px;
            }
            .search-form input {
                width: 180px;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--primary-color);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                box-shadow: var(--shadow);
            }
            #nav-toggle:checked ~ .main-nav ul {
                display: flex;
            }
            .nav-container {
                order: 3;
                width: 100%;
                justify-content: space-between;
                margin-top: 15px;
            }
            .search-form {
                width: 100%;
            }
            .search-form input {
                width: 100%;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .article-content {
                padding: 20px;
            }
        }