:root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --primary-dark: #000051;
            --secondary: #d32f2f;
            --secondary-light: #ff6659;
            --secondary-dark: #9a0007;
            --accent: #ff9800;
            --text-primary: #212121;
            --text-secondary: #757575;
            --bg-light: #f5f5f5;
            --bg-white: #ffffff;
            --border: #e0e0e0;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --radius: 8px;
            --transition: all 0.3s ease;
            font-size: 16px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--text-primary);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-family: 'Georgia', serif;
            font-size: 2.2rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            letter-spacing: 1px;
            text-transform: uppercase;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a span {
            color: var(--accent);
        }
        .logo a:hover {
            transform: scale(1.02);
            transition: var(--transition);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .nav-desktop a:hover, .nav-desktop a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--primary-dark);
            padding: 1rem;
            transform: translateY(-100%);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .nav-mobile.active {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }
        .nav-mobile a {
            display: block;
            color: white;
            text-decoration: none;
            padding: 0.8rem 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            font-weight: 600;
        }
        .nav-mobile a:hover {
            color: var(--accent);
            padding-left: 10px;
            transition: var(--transition);
        }
        .breadcrumb {
            background-color: var(--bg-white);
            padding: 0.8rem 1.5rem;
            border-bottom: 1px solid var(--border);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: var(--text-secondary);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .container {
            max-width: 1280px;
            margin: 2rem auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2.5rem;
            overflow: hidden;
        }
        .article-header {
            border-bottom: 3px solid var(--primary);
            padding-bottom: 1.5rem;
            margin-bottom: 2.5rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        .meta i {
            margin-right: 0.5rem;
            color: var(--accent);
        }
        .lead {
            font-size: 1.3rem;
            color: var(--text-primary);
            font-weight: 500;
            border-left: 4px solid var(--accent);
            padding-left: 1.5rem;
            margin: 2rem 0;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 3rem 0 1.5rem 0;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed var(--border);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--primary-light);
            margin: 2.5rem 0 1rem 0;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--text-primary);
            margin: 2rem 0 1rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 152, 0, 0.1);
            border-left: 4px solid var(--accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        .bold {
            font-weight: 700;
            color: var(--primary-dark);
        }
        em {
            color: var(--secondary);
            font-style: italic;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .img-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .img-container img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .img-container img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 0.8rem;
            font-style: italic;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        th, td {
            border: 1px solid var(--border);
            padding: 1rem;
            text-align: left;
        }
        th {
            background-color: var(--primary);
            color: white;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background-color: var(--bg-light);
        }
        aside {
            background-color: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: var(--primary);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border);
            margin-bottom: 1.2rem;
        }
        .search-box {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-box input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 1px solid var(--border);
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-box button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: var(--primary-dark);
        }
        .toc {
            list-style: none;
            padding-left: 0;
        }
        .toc li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dotted var(--border);
        }
        .toc a {
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        .toc a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .toc a i {
            margin-right: 0.8rem;
            color: var(--accent);
            font-size: 0.9rem;
        }
        .interactive-section {
            background-color: #f8f9fa;
            border-radius: var(--radius);
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid var(--border);
        }
        .interactive-section h3 {
            margin-top: 0;
        }
        .rating-form, .comment-form {
            margin-top: 1.5rem;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars label:hover,
        .rating-stars label:hover ~ label,
        .rating-stars input:checked ~ label {
            color: var(--accent);
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text-primary);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            font-size: 1rem;
            font-family: inherit;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
        }
        .btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .btn-accent {
            background-color: var(--accent);
        }
        .btn-accent:hover {
            background-color: #e68900;
        }
        .footer-links {
            background-color: var(--primary-dark);
            color: white;
            padding: 3rem 1.5rem;
        }
        .footer-links-container {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 2rem;
        }
        .web-link {
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            padding: 1.2rem;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        .web-link a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            display: block;
            line-height: 1.6;
        }
        .web-link a:hover {
            color: var(--accent);
        }
        .web-link a::before {
            content: "🔗";
            margin-right: 0.8rem;
        }
        .footer {
            background-color: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            text-align: center;
            padding: 1.5rem;
            font-size: 0.95rem;
        }
        .footer p {
            margin-bottom: 0.5rem;
        }
        .footer a {
            color: var(--accent);
            text-decoration: none;
        }
        .footer a:hover {
            text-decoration: underline;
        }
        @media (max-width: 768px) {
            .container, .header-container, .breadcrumb ol, .footer-links-container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            article {
                padding: 1.5rem;
            }
            .meta {
                flex-direction: column;
                gap: 0.8rem;
            }
            .footer-links-container {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            .header, .breadcrumb, aside, .interactive-section, .footer-links, .footer {
                display: none;
            }
            body {
                background-color: white;
                color: black;
                font-size: 12pt;
                line-height: 1.5;
            }
            .container {
                max-width: 100%;
                margin: 0;
                padding: 0;
                grid-template-columns: 1fr;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }