* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #e74c3c;
            --accent-color: #f39c12;
            --light-bg: #f9f9f9;
            --dark-text: #333;
            --light-text: #666;
            --border-color: #e1e1e1;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            background-color: #fff;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            margin-top: 2rem;
            position: relative;
            padding-bottom: 1rem;
        }
        h1:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100px;
            height: 4px;
            background: var(--secondary-color);
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 2.5rem;
            border-left: 5px solid var(--accent-color);
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
            color: var(--secondary-color);
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-header {
            background-color: var(--primary-color);
            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-size: 2rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--accent-color);
        }
        .logo:hover {
            color: var(--accent-color);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: var(--secondary-color);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--light-text);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
        }
        .breadcrumb i {
            margin: 0 0.5rem;
            font-size: 0.8rem;
            color: var(--light-text);
        }
        .search-section {
            background: linear-gradient(135deg, var(--primary-color), #1a2530);
            padding: 3rem 0;
            text-align: center;
            color: white;
            margin-bottom: 3rem;
        }
        .search-container {
            max-width: 700px;
            margin: 0 auto;
        }
        .search-section h2 {
            color: white;
            border: none;
            padding: 0;
            margin-bottom: 1.5rem;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: 50px 0 0 50px;
            font-size: 1.1rem;
            outline: none;
        }
        .search-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 2rem;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #c0392b;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .article-content {
            background-color: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            background-color: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .featured-image {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 4px solid var(--accent-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight p {
            margin-bottom: 0;
            font-style: italic;
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-item {
            background-color: var(--light-bg);
            padding: 1.5rem;
            border-radius: 8px;
            text-align: center;
            border-top: 4px solid var(--secondary-color);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--secondary-color);
            display: block;
            line-height: 1;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--light-text);
            margin-top: 0.5rem;
        }
        .interactive-section {
            background-color: var(--light-bg);
            padding: 2.5rem;
            border-radius: 10px;
            margin: 3rem 0;
        }
        .tabs {
            display: flex;
            border-bottom: 2px solid var(--border-color);
            margin-bottom: 2rem;
        }
        .tab-btn {
            padding: 1rem 2rem;
            background: none;
            border: none;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--light-text);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }
        .tab-btn.active {
            color: var(--secondary-color);
        }
        .tab-btn.active:after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--secondary-color);
        }
        .tab-content {
            display: none;
            animation: fadeIn 0.5s ease;
        }
        .tab-content.active {
            display: block;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .comment-rating-section {
            margin-top: 4rem;
        }
        .rating-form, .comment-form {
            background-color: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.2);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: var(--accent-color);
        }
        .submit-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 6px;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .submit-btn:hover {
            background-color: #c0392b;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(231, 76, 60, 0.3);
        }
        .footer-links {
            background-color: var(--primary-color);
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .footer-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 2rem;
        }
        .web-link {
            background-color: rgba(255,255,255,0.1);
            padding: 1.5rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: rgba(255,255,255,0.2);
            transform: translateX(10px);
        }
        .web-link a {
            color: white;
            text-decoration: none;
            font-size: 1.1rem;
            display: block;
        }
        .web-link a:hover {
            color: var(--accent-color);
        }
        .main-footer {
            background-color: #1a2530;
            color: #ccc;
            padding: 2.5rem 0;
            text-align: center;
        }
        .copyright {
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #999;
        }
        @media (max-width: 1024px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            .main-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background-color: var(--primary-color);
                padding: 2rem;
                transition: var(--transition);
                z-index: 999;
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-radius: 6px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input,
            .search-btn {
                border-radius: 50px;
                width: 100%;
            }
            .search-input {
                margin-bottom: 1rem;
            }
            .stats-box {
                grid-template-columns: 1fr;
            }
            .tabs {
                flex-direction: column;
            }
            .tab-btn {
                text-align: left;
                border-bottom: 1px solid var(--border-color);
            }
            .featured-image {
                height: 250px;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            .container {
                padding: 0 15px;
            }
            .article-content,
            .sidebar,
            .interactive-section {
                padding: 1.5rem;
            }
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .text-accent { color: var(--accent-color); }
        .text-secondary { color: var(--secondary-color); }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .flex { display: flex; }
        .flex-between { justify-content: space-between; }
        .flex-center { align-items: center; }
        .emoji {
            font-size: 1.2em;
            margin: 0 0.2em;
        }
        .card-symbol {
            color: var(--secondary-color);
            font-weight: bold;
            margin: 0 0.2em;
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }