:root {
            --primary-color: #D35400;
            --secondary-color: #2C3E50;
            --accent-color: #E74C3C;
            --light-bg: #FDFEFE;
            --dark-text: #2C3E50;
            --light-text: #ECF0F1;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark-text);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--secondary-color);
            color: var(--light-text);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--primary-color);
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 2px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent-color);
            transform: scale(1.05);
        }
        .my-logo span {
            color: var(--light-text);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--light-text);
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: var(--primary-color);
            color: white;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--light-text);
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #34495E;
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #BDC3C7;
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .breadcrumb span {
            color: var(--light-text);
            margin: 0 0.5rem;
        }
        .hero {
            background: linear-gradient(135deg, var(--secondary-color) 0%, #1a2530 100%);
            color: white;
            padding: 4rem 0;
            text-align: center;
            margin-bottom: 3rem;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            color: #ECF0F1;
        }
        .interactive-module {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            margin-bottom: 3rem;
            box-shadow: var(--shadow);
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .module-box h2 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 0.5rem;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #BDC3C7;
            border-radius: var(--border-radius);
            transition: var(--transition);
            font-size: 1rem;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(211, 84, 0, 0.2);
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.3rem;
        }
        .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: #f39c12;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            display: inline-block;
        }
        .btn:hover {
            background-color: var(--accent-color);
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 4rem;
        }
        .article-content {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 3rem;
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: #7F8C8D;
            font-size: 0.9rem;
            margin-bottom: 2rem;
            border-bottom: 1px solid #ECF0F1;
            padding-bottom: 1rem;
        }
        h1, h2, h3, h4 {
            color: var(--secondary-color);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--primary-color);
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.8rem;
        }
        h4 {
            font-size: 1.4rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--secondary-color);
            background-color: #F8F9F9;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary-color);
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #FFF3E0;
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .img-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .featured-img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .featured-img:hover {
            transform: scale(1.02);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .img-caption {
            font-size: 0.9rem;
            color: #7F8C8D;
            margin-top: 0.8rem;
            font-style: italic;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .content-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted transparent;
            transition: var(--transition);
        }
        .content-link:hover {
            color: var(--accent-color);
            border-bottom-color: var(--accent-color);
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 0.5rem;
        }
        .strong-point {
            font-weight: 700;
            color: var(--primary-color);
        }
        .sidebar {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: var(--primary-color);
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 0.5rem;
            margin-top: 0;
        }
        .sidebar ul {
            list-style: none;
            margin-left: 0;
        }
        .sidebar li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #ECF0F1;
        }
        .sidebar a {
            color: var(--secondary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        .sidebar a:hover {
            color: var(--primary-color);
            padding-left: 0.5rem;
        }
        .sidebar i {
            margin-right: 0.8rem;
            color: var(--primary-color);
        }
        .quick-fact {
            background-color: #F8F9F9;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-top: 2rem;
        }
        .site-footer {
            background-color: var(--secondary-color);
            color: var(--light-text);
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-family: 'Georgia', serif;
            font-size: 2rem;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: var(--light-text);
            margin-bottom: 1.5rem;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #BDC3C7;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background-color: #34495E;
            padding: 1rem;
            border-radius: var(--border-radius);
            margin-bottom: 1rem;
        }
        friend-link a {
            color: var(--light-text);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
        }
        friend-link a:hover {
            color: var(--primary-color);
        }
        friend-link i {
            margin-right: 0.8rem;
            font-size: 1.2rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495E;
            color: #95A5A6;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .hero h1 {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .main-nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--secondary-color);
                flex-direction: column;
                padding: 1rem;
                box-shadow: var(--shadow);
                text-align: center;
            }
            .main-nav.active ul {
                display: flex;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-radius: var(--border-radius);
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .interactive-module {
                grid-template-columns: 1fr;
            }
            .article-content {
                padding: 2rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .btn {
                padding: 0.7rem 1.5rem;
                font-size: 0.9rem;
            }
        }