* {
            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;
            max-width: 100%;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        h1, h2, h3, h4 {
            font-family: Georgia, 'Times New Roman', Times, 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: #3498db;
            margin-top: 2.5rem;
            padding-left: 0.75rem;
            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: 500;
            color: #555;
            background: #e8f4fc;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        em {
            color: #7d3c98;
            font-style: italic;
        }
        strong {
            color: #c0392b;
            font-weight: 700;
        }
        blockquote {
            border-left: 4px solid #f39c12;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background: #fef9e7;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background: linear-gradient(135deg, #2c3e50 0%, #4a6491 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: white;
            text-decoration: none;
            font-size: 2.2rem;
            font-weight: 800;
            font-family: 'Trebuchet MS', sans-serif;
            letter-spacing: -1px;
        }
        .logo span {
            color: #f1c40f;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        .main-nav li {
            margin-left: 2rem;
        }
        .main-nav a {
            color: #ecf0f1;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: rgba(241, 196, 15, 0.9);
            color: #2c3e50;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background: #ecf0f1;
            padding: 0.8rem 1.5rem;
            border-radius: 0 0 8px 8px;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #3498db;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: #7f8c8d;
        }
        .featured-image {
            margin: 2.5rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            position: relative;
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            padding: 0.75rem;
            background: #f8f9fa;
            color: #666;
            font-size: 0.95rem;
        }
        .content-main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2.5rem 0;
        }
        @media (max-width: 992px) {
            .content-main {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .interactive-module {
            background: #f8f9fa;
            border: 1px solid #ddd;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .module-title {
            font-size: 1.6rem;
            margin-bottom: 1.5rem;
            color: #2980b9;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .module-title i {
            color: #e74c3c;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.85rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            font-family: inherit;
            transition: border 0.3s;
        }
        input:focus,
        textarea:focus,
        select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #3498db, #2980b9);
            color: white;
            padding: 0.9rem 1.8rem;
            border: none;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
        }
        .btn:hover {
            background: linear-gradient(to right, #2980b9, #1c6ea4);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0,0,0,0.1);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #f1c40f;
        }
        .web-links-section {
            background: #2c3e50;
            color: white;
            padding: 3rem 1.5rem;
            margin-top: 4rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .web-link {
            background: rgba(255,255,255,0.1);
            padding: 1.2rem;
            border-radius: 8px;
            transition: transform 0.3s, background 0.3s;
        }
        .web-link:hover {
            background: rgba(52, 152, 219, 0.3);
            transform: translateY(-5px);
        }
        .web-link a {
            color: #f1c40f;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            display: block;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        .site-footer {
            background: #1a252f;
            color: #bdc3c7;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        .copyright {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            width: 100%;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-container {
                flex-wrap: wrap;
            }
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
            }
            .main-nav.active {
                max-height: 400px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                width: 100%;
            }
            .main-nav li {
                margin: 0.5rem 0;
                margin-left: 0;
            }
            .main-nav a {
                display: block;
                padding: 0.8rem;
                background: rgba(255,255,255,0.05);
            }
            .article-body,
            .sidebar {
                padding: 1.5rem;
            }
            .content-main {
                gap: 2rem;
            }
        }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-3 { margin-top: 3rem; }
        .emoji { font-size: 1.2em; }