* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #4361ee;
            --primary-dark: #3a56d4;
            --secondary: #7209b7;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --light-gray: #e9ecef;
            --success: #4cc9f0;
            --border-radius: 12px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            background-color: #fff;
            color: var(--dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(67, 97, 238, 0.3);
            color: white;
        }
        header {
            background-color: white;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            padding: 15px 0;
            border-bottom: 1px solid var(--light-gray);
        }
        .header-top .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.5px;
        }
        .search-box {
            flex-grow: 1;
            max-width: 500px;
            margin: 0 30px;
            position: relative;
        }
        .search-box form {
            display: flex;
        }
        .search-box input {
            width: 100%;
            padding: 14px 20px;
            border: 2px solid var(--light-gray);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-box input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-box button {
            padding: 0 25px;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            color: white;
            border: none;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: linear-gradient(to right, var(--primary-dark), var(--secondary));
        }
        .user-actions a {
            margin-left: 20px;
            font-size: 1.1rem;
            color: var(--gray);
        }
        .user-actions a:hover {
            color: var(--primary);
        }
        nav {
            padding: 15px 0;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-links a {
            color: var(--dark);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 0;
            position: relative;
        }
        .nav-links a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            transition: width 0.3s ease;
        }
        .nav-links a:hover:after,
        .nav-links a.active:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--dark);
        }
        .breadcrumb {
            padding: 20px 0;
            background-color: var(--light);
            margin-bottom: 30px;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child):after {
            content: '>';
            margin-left: 10px;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--dark);
            font-weight: 600;
        }
        main {
            padding: 30px 0 60px;
        }
        .article-header {
            margin-bottom: 40px;
            text-align: center;
            padding: 30px;
            background: linear-gradient(135deg, #f5f7ff, #e3e9ff);
            border-radius: var(--border-radius);
        }
        .article-header h1 {
            font-size: 3.2rem;
            margin-bottom: 15px;
            color: var(--dark);
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 25px;
            color: var(--gray);
            font-size: 0.95rem;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 350px;
            gap: 40px;
        }
        article {
            font-size: 1.125rem;
        }
        article h2 {
            font-size: 2.2rem;
            margin: 50px 0 20px;
            color: var(--dark);
            padding-bottom: 10px;
            border-bottom: 3px solid var(--light-gray);
        }
        article h3 {
            font-size: 1.7rem;
            margin: 40px 0 15px;
            color: var(--primary-dark);
        }
        article p {
            margin-bottom: 25px;
            text-align: justify;
        }
        article strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        article em {
            background-color: #fffacd;
            padding: 0 5px;
            font-style: italic;
        }
        .highlight-box {
            background-color: #f0f8ff;
            border-left: 5px solid var(--primary);
            padding: 25px;
            margin: 35px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .image-container {
            margin: 40px 0;
            text-align: center;
        }
        .image-container img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 0 auto;
        }
        .image-caption {
            margin-top: 10px;
            font-style: italic;
            color: var(--gray);
            font-size: 0.95rem;
        }
        aside {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 25px;
            margin-bottom: 30px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--dark);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-gray);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffc107;
            margin: 15px 0;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        #rating-form {
            display: none;
            margin-top: 20px;
        }
        #rating-form textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid var(--light-gray);
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            resize: vertical;
        }
        .comment-list {
            max-height: 400px;
            overflow-y: auto;
        }
        .comment-item {
            padding: 15px 0;
            border-bottom: 1px solid var(--light-gray);
        }
        .comment-item:last-child {
            border-bottom: none;
        }
        .comment-author {
            font-weight: 600;
            color: var(--dark);
        }
        .comment-date {
            font-size: 0.85rem;
            color: var(--gray);
        }
        .comment-text {
            margin-top: 8px;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
        }
        .feature-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }
        .feature-card i {
            font-size: 3rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 20px;
        }
        .footer-links {
            background-color: var(--light);
            padding: 50px 0 30px;
        }
        .web-link {
            display: inline-block;
            margin: 10px 20px 10px 0;
            padding: 12px 24px;
            background-color: white;
            border-radius: 50px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        .web-link a {
            color: inherit;
        }
        footer {
            background-color: var(--dark);
            color: var(--light-gray);
            padding: 50px 0 30px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-col h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--accent));
        }
        .footer-links-list {
            list-style: none;
        }
        .footer-links-list li {
            margin-bottom: 15px;
        }
        .footer-links-list a {
            color: #adb5bd;
            transition: var(--transition);
        }
        .footer-links-list a:hover {
            color: white;
            padding-left: 8px;
        }
        .copyright {
            text-align: center;
            padding-top: 40px;
            margin-top: 40px;
            border-top: 1px solid #495057;
            font-size: 0.9rem;
            color: #adb5bd;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 2.8rem;
            }
            .nav-links {
                gap: 20px;
            }
        }
        @media (max-width: 768px) {
            .header-top .container {
                flex-wrap: wrap;
            }
            .search-box {
                order: 3;
                max-width: 100%;
                margin: 20px 0 0;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 120px;
                left: -100%;
                flex-direction: column;
                background-color: white;
                width: 100%;
                padding: 30px;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
                transition: left 0.5s ease;
                z-index: 999;
            }
            .nav-links.active {
                left: 0;
            }
            .nav-links a {
                padding: 15px 0;
                font-size: 1.2rem;
                border-bottom: 1px solid var(--light-gray);
            }
            .article-header h1 {
                font-size: 2.3rem;
            }
            article h2 {
                font-size: 1.9rem;
            }
            .interactive-section {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.9rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 10px;
            }
            .feature-card {
                padding: 20px;
            }
        }