* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #4a6fa5;
            --secondary: #f0b400;
            --accent: #d9534f;
            --dark: #2c3e50;
            --light: #ecf0f1;
            --gray: #7f8c8d;
            --success: #5cb85c;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(to right, var(--dark), var(--primary));
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-family: 'Impact', fantasy;
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--secondary);
            text-decoration: none;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: 1px;
        }
        .logo span {
            color: white;
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: var(--dark);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background: rgba(255,255,255,0.1);
            padding-left: 1.5rem;
        }
        .breadcrumb {
            background: white;
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem auto;
            box-shadow: var(--shadow);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .hero {
            background: linear-gradient(rgba(44, 62, 80, 0.9), rgba(44, 62, 80, 0.9)), url('https://images.unsplash.com/photo-1511512578047-dfb367046420?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 4rem 2rem;
            text-align: center;
            border-radius: 12px;
            margin: 2rem auto;
            box-shadow: var(--shadow);
        }
        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        .search-box {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            margin: 2rem auto;
            max-width: 800px;
        }
        .search-box h2 {
            color: var(--dark);
            margin-bottom: 1rem;
            text-align: center;
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        @media (max-width: 576px) {
            .search-form {
                flex-direction: column;
            }
        }
        .search-form input {
            flex: 1;
            padding: 1rem;
            border: 2px solid var(--primary);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(240, 180, 0, 0.2);
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--secondary);
            transform: translateY(-2px);
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem auto;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .content {
            background: white;
            padding: 3rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .content h2 {
            color: var(--dark);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary);
        }
        .content h3 {
            color: var(--primary);
            margin: 1.5rem 0 1rem;
        }
        .content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .content ul, .content ol {
            margin-bottom: 1.5rem;
            padding-left: 2rem;
        }
        .content li {
            margin-bottom: 0.5rem;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(240, 180, 0, 0.2) 0%, rgba(240, 180, 0, 0.1) 100%);
            padding: 2rem;
            border-left: 4px solid var(--secondary);
            border-radius: 8px;
            margin: 2rem 0;
        }
        .highlight strong {
            color: var(--dark);
            font-size: 1.1rem;
        }
        .cta-button {
            display: inline-block;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            color: white;
            padding: 1rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            margin: 1rem 0;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(74, 111, 165, 0.3);
        }
        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(74, 111, 165, 0.4);
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            border-radius: 8px;
            overflow: hidden;
        }
        .comparison-table th {
            background: var(--primary);
            color: white;
            padding: 1rem;
            text-align: left;
        }
        .comparison-table td {
            padding: 1rem;
            border-bottom: 1px solid #eee;
        }
        .comparison-table tr:nth-child(even) {
            background: #f8f9fa;
        }
        .comparison-table tr:hover {
            background: #e3f2fd;
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        @media (max-width: 992px) {
            .sidebar {
                position: static;
            }
        }
        .sidebar h3 {
            color: var(--dark);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--secondary);
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-links {
            list-style: none;
            padding: 0;
        }
        .sidebar-links li {
            margin-bottom: 0.8rem;
        }
        .sidebar-links a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
            display: block;
            padding: 0.5rem;
            border-radius: 4px;
        }
        .sidebar-links a:hover {
            background: #f0f7ff;
            padding-left: 1rem;
        }
        .user-interaction {
            background: white;
            padding: 3rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            margin: 2rem auto;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        .interaction-form {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 8px;
            border: 1px solid #e9ecef;
        }
        .interaction-form h3 {
            color: var(--dark);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interaction-form h3 i {
            color: var(--secondary);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: var(--dark);
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        .rating {
            display: flex;
            gap: 5px;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: var(--secondary);
        }
        .submit-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }
        .submit-btn:hover {
            background: var(--secondary);
            transform: translateY(-2px);
        }
        .footer-links {
            background: var(--dark);
            padding: 3rem 2rem;
            margin-top: 3rem;
            border-radius: 12px 12px 0 0;
        }
        .web-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            color: white;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid rgba(255,255,255,0.2);
        }
        .web-link:hover {
            background: var(--secondary);
            transform: translateY(-2px);
            color: var(--dark);
        }
        footer {
            background: #1a252f;
            color: white;
            padding: 3rem 2rem;
            text-align: center;
        }
        .footer-content {
            max-width: 800px;
            margin: 0 auto;
        }
        .copyright {
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .mb-3 {
            margin-bottom: 3rem;
        }
        .mt-3 {
            margin-top: 3rem;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 5px;
        }
        .keyword {
            background: linear-gradient(120deg, rgba(240, 180, 0, 0.2) 0%, rgba(240, 180, 0, 0) 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: bold;
            color: var(--dark);
        }
        @media (max-width: 768px) {
            .container, .content, .sidebar, .user-interaction {
                padding: 1.5rem;
            }
            .hero {
                padding: 2rem 1rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .comparison-table {
                display: block;
                overflow-x: auto;
            }
        }