:root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #3498db;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --gray: #95a5a6;
            --success: #27ae60;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: #f8f9fa;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary);
            text-decoration: none;
            letter-spacing: -1px;
        }
        .logo span {
            color: var(--primary);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--secondary);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: var(--transition);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .search-box {
            display: flex;
            margin-left: 30px;
        }
        .search-box input {
            padding: 10px 15px;
            border: 2px solid var(--light);
            border-radius: var(--radius) 0 0 var(--radius);
            outline: none;
            width: 250px;
            transition: var(--transition);
        }
        .search-box input:focus {
            border-color: var(--accent);
        }
        .search-box button {
            background: var(--accent);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: #2980b9;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--dark);
        }
        .breadcrumb {
            background: var(--light);
            padding: 12px 0;
            font-size: 0.9rem;
            margin-bottom: 30px;
        }
        .breadcrumb a {
            color: var(--accent);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 8px;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 30px 0;
        }
        article {
            background: white;
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }
        aside {
            background: white;
            border-radius: var(--radius);
            padding: 25px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 35px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin: 25px 0 15px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--primary);
            font-weight: 600;
            background: var(--light);
            padding: 20px;
            border-left: 5px solid var(--accent);
            border-radius: var(--radius);
            margin-bottom: 30px;
        }
        .highlight {
            background: #fff9e6;
            padding: 25px;
            border-radius: var(--radius);
            border-left: 5px solid #f1c40f;
            margin: 25px 0;
        }
        .tip {
            background: #e8f6f3;
            padding: 20px;
            border-radius: var(--radius);
            border-left: 5px solid var(--success);
            margin: 20px 0;
        }
        .tip i {
            color: var(--success);
            margin-right: 10px;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 10px;
        }
        strong {
            color: var(--primary);
        }
        .feature-img {
            width: 100%;
            height: auto;
            border-radius: var(--radius);
            margin: 25px 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .feature-img:hover {
            transform: scale(1.01);
        }
        .cta-box {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            padding: 30px;
            text-align: center;
            border-radius: var(--radius);
            margin: 40px 0;
        }
        .cta-button {
            display: inline-block;
            background: var(--secondary);
            color: white;
            padding: 15px 40px;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.2rem;
            margin-top: 20px;
            transition: var(--transition);
            box-shadow: 0 6px 0 rgba(192, 57, 43, 0.8);
        }
        .cta-button:hover {
            background: #c0392b;
            transform: translateY(-3px);
        }
        .rating-widget {
            background: var(--light);
            padding: 20px;
            border-radius: var(--radius);
            margin: 30px 0;
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #f1c40f;
            margin: 15px 0;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
            margin: 0 5px;
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .comment-section {
            margin-top: 50px;
        }
        .comment-form textarea,
        .comment-form input {
            width: 100%;
            padding: 15px;
            margin-bottom: 15px;
            border: 2px solid var(--light);
            border-radius: var(--radius);
            font-family: inherit;
            transition: var(--transition);
        }
        .comment-form textarea:focus,
        .comment-form input:focus {
            border-color: var(--accent);
            outline: none;
        }
        .comment-form button {
            background: var(--accent);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background: #2980b9;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin: 40px 0;
        }
        .web-link {
            background: var(--light);
            padding: 15px;
            border-radius: var(--radius);
            text-align: center;
        }
        .web-link a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background: var(--primary);
            color: white;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 40px;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h4 {
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #bbb;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            h1 {
                font-size: 2.3rem;
            }
        }
        @media (max-width: 768px) {
            .nav-links,
            .search-box {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .mobile-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background: white;
                box-shadow: var(--shadow);
                padding: 20px;
                transform: translateY(-100%);
                opacity: 0;
                transition: var(--transition);
                z-index: 999;
            }
            .mobile-nav.active {
                transform: translateY(0);
                opacity: 1;
            }
            .mobile-nav ul {
                list-style: none;
            }
            .mobile-nav li {
                margin-bottom: 15px;
            }
            .mobile-nav a {
                text-decoration: none;
                color: var(--dark);
                font-weight: 600;
                font-size: 1.1rem;
                display: block;
                padding: 10px 0;
                border-bottom: 1px solid var(--light);
            }
            .header-top {
                padding: 12px 0;
            }
            article {
                padding: 25px;
            }
        }