:root {
            --primary: #FF6B6B;
            --secondary: #4ECDC4;
            --accent: #FFD166;
            --dark: #2D3047;
            --light: #F7FFF7;
            --gray: #6C757D;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --radius: 12px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Arial', 'Nirmala UI', sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            color: var(--dark);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .header {
            background: var(--dark);
            padding: 1rem 2rem;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo span {
            color: var(--primary);
            text-shadow: 0 0 10px rgba(255,107,107,0.3);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            color: var(--light);
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            transition: var(--transition);
            position: relative;
        }
        .nav-desktop a:hover {
            background: var(--primary);
            transform: translateY(-2px);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: var(--transition);
        }
        .nav-desktop a:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--light);
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .nav-mobile {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: var(--dark);
            padding: 1rem;
            flex-direction: column;
            gap: 1rem;
            box-shadow: var(--shadow);
            border-top: 2px solid var(--primary);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: var(--light);
            text-decoration: none;
            padding: 0.8rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .nav-mobile a:hover {
            background: var(--primary);
            padding-left: 1.5rem;
        }
        .breadcrumb {
            background: var(--light);
            padding: 1rem 2rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb ol {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            gap: 0.5rem;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: var(--gray);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--gray);
            font-size: 0.9rem;
        }
        .main-container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            flex: 1;
            display: grid;
            grid-template-columns: 1fr 350px;
            gap: 2.5rem;
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .article {
            background: white;
            border-radius: var(--radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .article-header {
            margin-bottom: 2rem;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 1.5rem;
        }
        .article-title {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: var(--gray);
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .content-section {
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 1px dashed #e0e0e0;
        }
        .section-title {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            padding-left: 1rem;
            border-left: 5px solid var(--secondary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .highlight-box {
            background: linear-gradient(to right, #FFEFBA, #FFFFFF);
            border-left: 4px solid var(--accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .code-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .code-item {
            background: var(--dark);
            color: var(--light);
            padding: 1rem;
            border-radius: var(--radius);
            text-align: center;
            font-family: monospace;
            font-size: 1.1rem;
            letter-spacing: 1px;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .code-item:hover {
            background: var(--primary);
            transform: translateY(-3px);
            border-color: var(--accent);
        }
        .image-container {
            margin: 2rem 0;
            text-align: center;
        }
        .featured-image {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: scale(1.02);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        .image-caption {
            margin-top: 0.8rem;
            color: var(--gray);
            font-style: italic;
            font-size: 0.95rem;
        }
        .interactive-section {
            background: linear-gradient(135deg, var(--light) 0%, #e3f2fd 100%);
            padding: 2rem;
            border-radius: var(--radius);
            margin: 2rem 0;
            border: 2px dashed var(--secondary);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark);
        }
        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #ddd;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(78,205,196,0.2);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn:hover {
            background: #ff5252;
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(255,107,107,0.3);
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #3dbeb6;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: var(--accent);
            transform: scale(1.2);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: var(--radius);
            padding: 1.8rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--primary);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: var(--radius);
        }
        .search-btn {
            background: var(--dark);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: var(--radius);
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: var(--primary);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #f0f0f0;
        }
        .related-links a {
            color: var(--dark);
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .related-links a:hover {
            color: var(--primary);
            padding-left: 0.5rem;
        }
        .footer-links {
            background: var(--dark);
            padding: 3rem 2rem 2rem;
            margin-top: 3rem;
        }
        .web-links-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background: rgba(255,255,255,0.05);
            padding: 1.2rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-3px);
        }
        .web-link a {
            color: var(--light);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            font-size: 1rem;
        }
        .web-link a:hover {
            color: var(--accent);
        }
        .footer {
            background: #1a1c2e;
            color: var(--light);
            padding: 2rem;
            text-align: center;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .copyright {
            color: #aaa;
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .copyright a {
            color: var(--accent);
            text-decoration: none;
        }
        @media (max-width: 768px) {
            .header {
                padding: 1rem;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .main-container {
                padding: 0 1rem;
                margin: 1rem auto;
            }
            .article {
                padding: 1.5rem;
            }
            .article-title {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .code-list {
                grid-template-columns: 1fr;
            }
            .footer-links {
                padding: 2rem 1rem;
            }
            .web-links-container {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .article-title {
                font-size: 1.5rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .rating-stars {
                justify-content: center;
            }
        }
        @media print {
            .header, .sidebar, .interactive-section, .footer-links, .footer {
                display: none;
            }
            .article {
                box-shadow: none;
                padding: 0;
            }
            body {
                background: white;
                color: black;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            border: 0;
        }
        :focus {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .content-section, .sidebar-widget {
            animation: fadeIn 0.6s ease-out;
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }