:root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --primary-dark: #000051;
            --secondary: #ffab00;
            --secondary-dark: #c67c00;
            --text: #f5f5f5;
            --text-muted: #b0bec5;
            --background: #121212;
            --surface: #1e1e1e;
            --surface-light: #2d2d2d;
            --border: #424242;
            --success: #00e676;
            --warning: #ff9100;
            --error: #ff5252;
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Roboto', 'Open Sans', sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            line-height: 1.8;
            color: var(--text);
            background-color: var(--background);
            background-image: radial-gradient(circle at 15% 50%, rgba(26, 35, 126, 0.15) 0%, transparent 55%),
                              radial-gradient(circle at 85% 30%, rgba(255, 171, 0, 0.1) 0%, transparent 55%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.3s ease, text-shadow 0.3s ease;
        }
        a:hover {
            color: var(--text);
            text-shadow: 0 0 8px var(--secondary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: rgba(18, 18, 18, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(90deg, var(--secondary), var(--primary-light));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        }
        .my-logo:hover {
            background: linear-gradient(90deg, var(--text), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
        }
        .main-nav {
            display: flex;
            gap: 25px;
        }
        .main-nav a {
            font-weight: 600;
            padding: 8px 5px;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after,
        .main-nav a.active::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border);
            background-color: rgba(30, 30, 30, 0.7);
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .search-container {
            background-color: var(--surface);
            border-radius: 8px;
            padding: 30px;
            margin: 30px 0;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
            border-left: 4px solid var(--secondary);
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex-grow: 1;
            padding: 15px 20px;
            border: 2px solid var(--border);
            border-radius: 6px;
            background-color: var(--background);
            color: var(--text);
            font-size: 1.1rem;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.3);
        }
        .search-button {
            padding: 15px 30px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
            border: none;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-button:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(26, 35, 126, 0.4);
        }
        main {
            flex-grow: 1;
            padding: 30px 0;
        }
        article {
            background-color: var(--surface);
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
            margin-bottom: 40px;
            border: 1px solid var(--border);
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
            padding-bottom: 20px;
            border-bottom: 2px solid var(--border);
        }
        .article-header h1 {
            font-family: var(--font-heading);
            font-size: 3.2rem;
            margin-bottom: 15px;
            color: var(--text);
            line-height: 1.2;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
        }
        .article-header .subtitle {
            font-size: 1.3rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto;
        }
        .last-updated {
            display: inline-block;
            background-color: var(--primary-dark);
            color: var(--text-muted);
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            margin-top: 20px;
        }
        .content-section {
            margin-bottom: 50px;
            padding-bottom: 30px;
            border-bottom: 1px solid var(--border);
        }
        h2 {
            font-size: 2.5rem;
            color: var(--secondary);
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--primary-light);
            font-family: var(--font-heading);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary-light);
            margin: 30px 0 15px;
            font-family: var(--font-heading);
        }
        h4 {
            font-size: 1.4rem;
            color: var(--text);
            margin: 25px 0 10px;
            font-family: var(--font-heading);
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: rgba(255, 171, 0, 0.1);
            border-left: 4px solid var(--secondary);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        .info-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 30px 0;
        }
        .info-card {
            background-color: var(--surface-light);
            padding: 25px;
            border-radius: 8px;
            border-top: 3px solid var(--primary-light);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .info-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
        }
        .info-card h4 {
            color: var(--secondary);
            margin-top: 0;
        }
        .image-container {
            margin: 35px auto;
            text-align: center;
            max-width: 900px;
        }
        .feature-img {
            width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8);
            border: 1px solid var(--border);
            transition: transform 0.5s ease;
        }
        .feature-img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            margin-top: 10px;
            font-style: italic;
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .related-links {
            background-color: var(--surface-light);
            border-radius: 10px;
            padding: 25px;
            margin: 40px 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin-top: 20px;
        }
        .links-grid a {
            display: block;
            padding: 12px 15px;
            background-color: rgba(26, 35, 126, 0.2);
            border-radius: 6px;
            transition: all 0.3s ease;
        }
        .links-grid a:hover {
            background-color: rgba(26, 35, 126, 0.4);
            padding-left: 20px;
        }
        .interaction-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-top: 50px;
        }
        @media (max-width: 768px) {
            .interaction-section {
                grid-template-columns: 1fr;
            }
        }
        .rating-container,
        .comment-container {
            background-color: var(--surface-light);
            padding: 30px;
            border-radius: 10px;
        }
        .rating-container h3,
        .comment-container h3 {
            margin-top: 0;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 20px 0;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2.5rem;
            color: var(--border);
            cursor: pointer;
            transition: color 0.3s ease;
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: var(--secondary);
        }
        .rating-form,
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-weight: 600;
        }
        .form-control {
            padding: 15px;
            border: 2px solid var(--border);
            border-radius: 6px;
            background-color: var(--background);
            color: var(--text);
            font-family: var(--font-body);
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-light);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            align-self: flex-start;
            padding: 15px 35px;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            color: var(--primary-dark);
            border: none;
            border-radius: 6px;
            font-weight: bold;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .submit-btn:hover {
            background: linear-gradient(135deg, #ffc400, var(--secondary));
            transform: translateY(-3px);
            box-shadow: 0 7px 20px rgba(255, 171, 0, 0.4);
        }
        footer {
            background-color: var(--primary-dark);
            color: var(--text-muted);
            padding: 50px 0 20px;
            margin-top: 60px;
            border-top: 1px solid var(--border);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h4 {
            color: var(--secondary);
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 10px;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .article-header h1 {
                font-size: 2.6rem;
            }
            h2 {
                font-size: 2.2rem;
            }
            h3 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0;
                margin-top: 20px;
                background-color: var(--surface);
                border-radius: 8px;
                padding: 15px;
                border: 1px solid var(--border);
            }
            .main-nav.active {
                display: flex;
            }
            .main-nav a {
                padding: 12px 10px;
                border-bottom: 1px solid var(--border);
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.9rem;
            }
            article {
                padding: 25px;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 15px;
            }
            .article-header h1 {
                font-size: 1.9rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-button {
                justify-content: center;
            }
        }