* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #10b981;
            --dark: #1f2937;
            --light: #f9fafb;
            --gray: #6b7280;
            --gray-light: #e5e7eb;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background-color: #ffffff;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .logo:hover {
            color: var(--primary-dark);
        }
        .desktop-nav ul {
            display: flex;
            gap: 30px;
        }
        .desktop-nav a {
            font-weight: 600;
            color: var(--dark);
            padding: 5px 0;
            position: relative;
        }
        .desktop-nav a:hover {
            color: var(--primary);
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark);
        }
        .mobile-nav {
            display: none;
            background-color: white;
            padding: 20px;
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .mobile-nav a {
            font-weight: 600;
            display: block;
            padding: 10px;
            border-radius: var(--radius);
        }
        .mobile-nav a:hover {
            background-color: var(--gray-light);
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 15px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--gray-light);
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 10px;
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        .search-section {
            padding: 40px 0 20px;
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
        }
        .search-container {
            max-width: 700px;
            margin: 0 auto;
        }
        .search-box {
            display: flex;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
            background: white;
        }
        .search-input {
            flex: 1;
            padding: 18px 25px;
            border: none;
            font-size: 1rem;
        }
        .search-input:focus {
            outline: none;
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--primary-dark);
        }
        main {
            padding: 40px 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 50px;
            padding-bottom: 30px;
            border-bottom: 2px solid var(--gray-light);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: var(--gray);
            font-size: 0.9rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-content {
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .article-content h2 {
            font-size: 2rem;
            margin: 50px 0 20px;
            color: var(--dark);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
        }
        .article-content h3 {
            font-size: 1.5rem;
            margin: 35px 0 15px;
            color: var(--dark);
        }
        .article-content p {
            margin-bottom: 25px;
            text-align: justify;
        }
        .article-content strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        .article-content em {
            color: var(--secondary);
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(to right, #f0f9ff, #e0f2fe);
            border-left: 5px solid var(--primary);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .featured-image {
            margin: 40px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img {
            transform: scale(1.02);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .sidebar {
            background-color: var(--light);
            padding: 25px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
        }
        .sidebar-links {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .sidebar-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 15px;
            background-color: white;
            border-radius: var(--radius);
            transition: var(--transition);
            border-left: 4px solid transparent;
        }
        .sidebar-link:hover {
            border-left-color: var(--primary);
            transform: translateX(5px);
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
        }
        .sidebar-link i {
            color: var(--primary);
        }
        .interactive-section {
            background-color: var(--light);
            padding: 40px;
            border-radius: var(--radius);
            margin: 60px 0;
            box-shadow: var(--shadow);
        }
        .interactive-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .rating-widget, .comment-widget {
            background-color: white;
            padding: 25px;
            border-radius: var(--radius);
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 15px 0;
        }
        .star {
            font-size: 1.8rem;
            color: var(--gray-light);
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #fbbf24;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-top: 20px;
        }
        .form-input {
            padding: 12px 15px;
            border: 1px solid var(--gray-light);
            border-radius: var(--radius);
            font-size: 1rem;
        }
        .form-input:focus {
            outline: none;
            border-color: var(--primary);
        }
        textarea.form-input {
            min-height: 120px;
            resize: vertical;
            font-family: inherit;
        }
        .submit-btn {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 14px;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: #0da271;
        }
        .web-links-section {
            padding: 50px 0;
            border-top: 1px solid var(--gray-light);
            border-bottom: 1px solid var(--gray-light);
            background-color: #f8fafc;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }
        .web-link {
            background: white;
            padding: 20px;
            border-radius: var(--radius);
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .web-link:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .web-link a {
            color: var(--primary);
            font-weight: 600;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h3 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            color: white;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--primary);
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            color: #d1d5db;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #374151;
            color: #9ca3af;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            h1 {
                font-size: 2.3rem;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            .article-content h2 {
                font-size: 1.7rem;
            }
            .interactive-grid {
                grid-template-columns: 1fr;
            }
            .search-section {
                padding: 30px 0 15px;
            }
            .search-box {
                flex-direction: column;
                border-radius: var(--radius);
            }
            .search-input {
                padding: 15px;
            }
            .search-btn {
                padding: 15px;
                border-radius: 0 0 var(--radius) var(--radius);
            }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 15px;
            }
            .article-header {
                margin-bottom: 30px;
            }
            .article-meta {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .interactive-section {
                padding: 25px;
            }
            .highlight-box {
                padding: 20px;
            }
        }