* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #013369; 
            --secondary: #D50A0A; 
            --accent: #FFC20E; 
            --dark: #1a1a1a;
            --light: #f8f9fa;
            --gray: #6c757d;
            --transition: all 0.3s ease;
        }
        body {
            background-color: #fff;
            color: var(--dark);
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, #002244 100%);
            color: white;
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0, 34, 68, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: white;
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: var(--accent);
        }
        .logo i {
            color: var(--accent);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 3px solid transparent;
        }
        .nav-desktop a:hover, .nav-desktop a.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            background-color: var(--primary);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            flex-direction: column;
            padding: 1rem 0;
            box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 0.8rem 1.5rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            font-weight: 600;
        }
        .nav-mobile a:hover {
            background-color: rgba(255,255,255,0.1);
            color: var(--accent);
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem 0;
            border-bottom: 1px solid #dee2e6;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 8px;
        }
        .main-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 0;
            flex-grow: 1;
        }
        @media (max-width: 992px) {
            .main-wrapper {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            border-radius: 8px;
            overflow: hidden;
        }
        .article-header {
            border-bottom: 3px solid var(--accent);
            padding-bottom: 1.5rem;
            margin-bottom: 2rem;
        }
        .article-header h1 {
            color: var(--primary);
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        @media (max-width: 768px) {
            .article-header h1 {
                font-size: 2.2rem;
            }
        }
        .article-meta {
            color: var(--gray);
            font-size: 0.95rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1rem;
        }
        .article-meta i {
            margin-right: 5px;
            color: var(--secondary);
        }
        .intro {
            font-size: 1.2rem;
            color: var(--dark);
            background: linear-gradient(to right, var(--light), transparent);
            padding: 1.5rem;
            border-left: 5px solid var(--secondary);
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .intro strong {
            color: var(--primary);
        }
        .content-section {
            margin-bottom: 3rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #e9ecef;
        }
        h3 {
            color: var(--secondary);
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 4px solid var(--accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        .key-term {
            font-weight: bold;
            color: var(--primary);
            border-bottom: 1px dotted var(--primary);
            cursor: help;
        }
        .figure {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .figure img {
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            border: 1px solid #dee2e6;
            transition: var(--transition);
        }
        .figure img:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 20px rgba(0,0,0,0.12);
        }
        .figcaption {
            font-size: 0.95rem;
            color: var(--gray);
            margin-top: 0.8rem;
            font-style: italic;
            padding: 0 1rem;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        .user-interaction {
            background-color: var(--light);
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
            border: 1px solid #dee2e6;
        }
        .user-interaction h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark);
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(1, 51, 105, 0.1);
        }
        .btn {
            display: inline-block;
            background-color: var(--primary);
            color: white;
            padding: 0.8rem 1.8rem;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: var(--secondary);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 12px rgba(213, 10, 10, 0.2);
        }
        .star-rating {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #ddd;
        }
        .star-rating i {
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating i:hover, .star-rating i.active {
            color: var(--accent);
        }
        aside {
            background-color: var(--light);
            border-radius: 8px;
            padding: 1.5rem;
            align-self: start;
            border: 1px solid #dee2e6;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h4 {
            color: var(--primary);
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
        }
        .search-box {
            display: flex;
            margin-bottom: 1rem;
        }
        .search-box input {
            flex-grow: 1;
            border-right: 0;
            border-radius: 6px 0 0 6px;
        }
        .search-box .btn {
            border-radius: 0 6px 6px 0;
            padding: 0.8rem 1.2rem;
        }
        .related-links ul {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dotted #ced4da;
        }
        .related-links li:last-child {
            border-bottom: none;
        }
        .related-links a {
            color: var(--dark);
            display: block;
        }
        .related-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        .footer-links-section {
            background-color: #002244;
            color: white;
            padding: 3rem 0;
        }
        .footer-links-section h3 {
            color: var(--accent);
            text-align: center;
            margin-bottom: 2rem;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 194, 14, 0.2);
            border-radius: 6px;
            padding: 1rem;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        .web-link a {
            color: white;
            font-weight: 500;
        }
        .web-link a:hover {
            color: var(--accent);
        }
        .site-footer {
            background-color: var(--dark);
            color: #adb5bd;
            padding: 3rem 0 1.5rem;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .copyright {
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #495057;
            width: 100%;
            font-size: 0.9rem;
        }
        .hidden-schema {
            display: none;
        }