:root {
            --primary: #0047AB; 
            --secondary: #FF4C00; 
            --accent: #00C853; 
            --dark: #1A1A2E;
            --light: #F8F9FA;
            --gray: #6C757D;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-family: 'Arial Black', sans-serif;
            font-size: 2rem;
            color: white;
            text-decoration: none;
            letter-spacing: -0.5px;
        }
        .logo span {
            color: var(--secondary);
            font-weight: 900;
        }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-desktop a:hover {
            color: var(--secondary);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary);
            transition: width 0.3s;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: var(--dark);
            flex-direction: column;
            padding: 1rem 2rem;
            box-shadow: var(--shadow);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 0.8rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        main {
            grid-column: 1;
        }
        aside {
            grid-column: 2;
        }
        .article-heading {
            margin-bottom: 2.5rem;
            border-bottom: 3px solid var(--primary);
            padding-bottom: 1rem;
        }
        .article-heading h1 {
            font-size: 2.8rem;
            color: var(--dark);
            line-height: 1.2;
            margin-bottom: 0.5rem;
        }
        .article-meta {
            color: var(--gray);
            font-size: 0.95rem;
            display: flex;
            gap: 1rem;
        }
        .article-meta i {
            margin-right: 0.3rem;
        }
        .featured-image {
            width: 100%;
            margin: 2.5rem 0;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .featured-image img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            padding: 0.5rem;
            font-size: 0.9rem;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        h2, h3 {
            color: var(--primary);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed #dee2e6;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.6rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: rgba(0, 71, 171, 0.05);
            border-left: 4px solid var(--primary);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        .key-term {
            font-weight: 700;
            color: var(--primary);
        }
        .inline-link {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted var(--secondary);
            transition: var(--transition);
        }
        .inline-link:hover {
            color: #d43f00;
            border-bottom-style: solid;
        }
        em {
            color: var(--gray);
        }
        .interactive-module {
            background: var(--light);
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            box-shadow: var(--shadow);
        }
        .module-title {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .module-title i {
            color: var(--primary);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 71, 171, 0.1);
        }
        button, .btn {
            background: linear-gradient(to right, var(--primary), #0066CC);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 6px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
            text-align: center;
            text-decoration: none;
            font-size: 1rem;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #003d82, var(--primary));
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 71, 171, 0.15);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #FFD700;
        }
        aside {
            position: sticky;
            top: 120px;
            align-self: start;
            height: fit-content;
        }
        .sidebar-widget {
            background: var(--light);
            border-radius: 10px;
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #dee2e6;
        }
        .related-links a {
            color: var(--dark);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.7rem;
            transition: var(--transition);
        }
        .related-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .related-links i {
            color: var(--primary);
            font-size: 0.9rem;
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }
        .footer-logo span {
            color: var(--secondary);
        }
        .footer-about p {
            color: #ccc;
            margin-bottom: 1.5rem;
        }
        friend-link {
            display: block;
            margin-top: 1rem;
        }
        .friend-link-item a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
            display: inline-block;
            padding: 0.3rem 0;
        }
        .friend-link-item a:hover {
            color: var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            aside {
                grid-column: 1;
                position: static;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
        }
        @media (max-width: 768px) {
            .header-container, .container, .breadcrumb {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .article-heading h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            .footer-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }