* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2ecc71;
            --secondary-color: #27ae60;
            --accent-color: #e74c3c;
            --dark-color: #2c3e50;
            --light-color: #ecf0f1;
            --text-color: #333;
            --text-light: #7f8c8d;
            --border-color: #ddd;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-color);
        }
        ul, ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-color);
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo span {
            color: var(--accent-color);
        }
        .search-container {
            flex: 0 1 300px;
            position: relative;
        }
        #search-form {
            display: flex;
        }
        #search-input {
            flex: 1;
            padding: 0.75rem 1rem;
            border: 2px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
            transition: var(--transition);
        }
        #search-input:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        #search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        #search-form button:hover {
            background-color: var(--secondary-color);
        }
        nav {
            padding: 1rem 0;
        }
        .breadcrumb {
            display: flex;
            list-style: none;
            padding: 0;
            margin-bottom: 1rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb li {
            margin-bottom: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .main-nav {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            color: var(--dark-color);
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark-color);
            cursor: pointer;
        }
        main {
            padding: 2rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        article {
            background-color: white;
            border-radius: 8px;
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        article > * {
            margin-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--dark-color);
            line-height: 1.2;
            margin-bottom: 1rem;
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--dark-color);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--dark-color);
            margin: 1.5rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--text-light);
            margin: 1rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: var(--text-light);
            font-size: 0.9rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        .last-updated {
            color: var(--accent-color);
            font-weight: 600;
        }
        .featured-image {
            margin: 2rem 0;
            text-align: center;
        }
        .featured-image img {
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin: 0 auto;
        }
        .image-caption {
            font-style: italic;
            color: var(--text-light);
            font-size: 0.9rem;
            margin-top: 0.5rem;
        }
        .highlight-box {
            background-color: #f8f9fa;
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 4px 4px 0;
        }
        .tip {
            background-color: #e8f4fc;
            border-left: 4px solid #3498db;
            padding: 1rem;
            margin: 1.5rem 0;
        }
        .warning {
            background-color: #fef2f2;
            border-left: 4px solid var(--accent-color);
            padding: 1rem;
            margin: 1.5rem 0;
        }
        .stat-box {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .stat-item {
            background-color: var(--light-color);
            padding: 1rem;
            border-radius: 4px;
            text-align: center;
        }
        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
        }
        blockquote {
            font-style: italic;
            border-left: 4px solid var(--secondary-color);
            padding-left: 1.5rem;
            margin: 2rem 0;
            color: var(--text-light);
        }
        .interactive-section {
            background-color: #f5f5f5;
            padding: 2rem;
            border-radius: 8px;
            margin: 3rem 0;
        }
        .rating-container {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .star-rating .star {
            color: #ddd;
            transition: var(--transition);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #ffc107;
        }
        #rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        #rating-form select,
        #rating-form textarea {
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
        }
        #rating-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        #rating-form button:hover {
            background-color: var(--secondary-color);
        }
        .comments-section {
            margin-top: 3rem;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .comment-form input,
        .comment-form textarea {
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
        }
        .comment-form button {
            align-self: flex-start;
            background-color: var(--dark-color);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background-color: #34495e;
        }
        aside {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.2rem;
            color: var(--dark-color);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-color);
        }
        .related-links {
            list-style: none;
            padding: 0;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid var(--border-color);
        }
        .related-links li:last-child {
            border-bottom: none;
        }
        .table-of-contents {
            position: sticky;
            top: 20px;
        }
        .toc-list {
            list-style: none;
            padding: 0;
        }
        .toc-list li {
            margin-bottom: 0.5rem;
        }
        .toc-list a {
            display: block;
            padding: 0.5rem 0;
            color: var(--text-color);
            border-left: 3px solid transparent;
            padding-left: 10px;
            transition: var(--transition);
        }
        .toc-list a:hover {
            border-left-color: var(--primary-color);
            background-color: #f8f9fa;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #bdc3c7;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
        }
        friend-link a {
            color: var(--primary-color);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            color: #bdc3c7;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            .table-of-contents {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
            .search-container {
                width: 100%;
            }
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: white;
                box-shadow: var(--shadow);
                padding: 1rem;
            }
            .main-nav.active {
                display: flex;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.75rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .stat-box {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            article {
                padding: 1.5rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .text-bold {
            font-weight: 700;
        }
        .text-italic {
            font-style: italic;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 2px;
        }
        .btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background-color: var(--secondary-color);
            color: white;
            transform: translateY(-2px);
        }