* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f7f4;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-family: 'Georgia', serif; color: #2c3e50; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: 2.8rem; border-bottom: 3px solid #e74c3c; padding-bottom: 0.5rem; margin-top: 1.5rem;}
        h2 { font-size: 2.2rem; color: #34495e; margin-top: 2.5rem; padding-left: 0.5rem; border-left: 5px solid #3498db;}
        h3 { font-size: 1.8rem; color: #16a085; margin-top: 2rem; }
        p { margin-bottom: 1.5rem; text-align: justify; font-size: 1.1rem; }
        .lead { font-size: 1.3rem; font-weight: 300; color: #555; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.5rem; border-radius: 3px; }
        em { color: #e74c3c; font-style: italic; }
        strong { color: #2c3e50; font-weight: 700; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #2c3e50 0%, #4a6491 100%);
            color: white;
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-family: 'Courier New', monospace;
            font-size: 2.2rem;
            font-weight: 800;
            color: #f1c40f;
            text-decoration: none;
            letter-spacing: 1px;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
        }
        .logo span { color: #ecf0f1; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #ecf0f1;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: #f1c40f;
            color: #2c3e50;
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #ecf0f1;
            font-size: 0.95rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.7rem;
            color: #7f8c8d;
        }
        .breadcrumb a {
            color: #3498db;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .hero {
            background: linear-gradient(rgba(44, 62, 80, 0.85), rgba(44, 62, 80, 0.9)), url('https://images.unsplash.com/photo-1611652022419-a9419f74343d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: 4rem 2rem;
            text-align: center;
            border-radius: 10px;
            margin-bottom: 3rem;
        }
        .hero h1 { color: #f1c40f; border: none; font-size: 3.2rem; }
        .hero p { font-size: 1.3rem; color: #ecf0f1; max-width: 800px; margin: 1.5rem auto; }
        .content-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .article-content p { margin-bottom: 1.8rem; }
        .article-content section { margin-bottom: 3.5rem; }
        .figure-wrapper {
            margin: 2.5rem 0;
            text-align: center;
            border: 1px solid #ddd;
            padding: 1rem;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .figure-wrapper img {
            border-radius: 5px;
            margin: 0 auto 1rem;
        }
        .figure-caption {
            font-style: italic;
            color: #7f8c8d;
            font-size: 0.95rem;
        }
        .sidebar {
            background-color: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .widget { margin-bottom: 2.5rem; }
        .widget h3 { font-size: 1.5rem; border-bottom: 2px dashed #3498db; padding-bottom: 0.5rem; margin-top: 0; }
        .search-form { display: flex; }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem;
            border: 2px solid #3498db;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover { background-color: #2980b9; }
        .rating-widget p { margin-bottom: 1rem; }
        .stars { display: flex; gap: 0.3rem; margin-bottom: 1rem; }
        .stars i { color: #f1c40f; cursor: pointer; font-size: 1.5rem; transition: transform 0.2s; }
        .stars i:hover { transform: scale(1.2); }
        .rating-form textarea,
        .rating-form input {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
        }
        .rating-form button {
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            width: 100%;
            font-weight: bold;
            transition: background 0.3s;
        }
        .rating-form button:hover { background-color: #27ae60; }
        .web-links-section {
            background-color: #ecf0f1;
            padding: 3rem 0;
            margin: 3rem 0;
            border-top: 3px solid #3498db;
            border-bottom: 3px solid #3498db;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: white;
            padding: 1.2rem;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.12);
        }
        .web-link a {
            color: #2c3e50;
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .web-link a:before {
            content: '🧩';
            font-size: 1.2rem;
        }
        .web-link a:hover { color: #e74c3c; }
        .site-footer {
            background-color: #2c3e50;
            color: #bdc3c7;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo { flex: 1; min-width: 250px; }
        .footer-logo .logo a { font-size: 1.8rem; }
        .footer-nav { flex: 2; min-width: 300px; }
        .footer-nav h4 { color: #f1c40f; margin-bottom: 1.5rem; }
        .footer-nav ul { list-style: none; }
        .footer-nav li { margin-bottom: 0.8rem; }
        .footer-nav a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-nav a:hover { color: #f1c40f; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        @media (max-width: 992px) {
            .content-layout { grid-template-columns: 1fr; }
            .sidebar { position: static; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .hero h1 { font-size: 2.5rem; }
            .main-nav ul {
                flex-direction: column;
                position: fixed;
                top: 90px;
                left: -100%;
                width: 100%;
                background-color: #2c3e50;
                padding: 2rem;
                transition: left 0.5s ease;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                z-index: 999;
            }
            .main-nav.active ul { left: 0; }
            .hamburger { display: block; }
            .header-content { position: relative; }
        }
        @media (max-width: 576px) {
            .hero { padding: 3rem 1rem; }
            .web-links-grid { grid-template-columns: 1fr; }
            .footer-content { flex-direction: column; }
        }