* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --border-radius: 8px;
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
            margin-bottom: 30px;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: var(--secondary-color);
        }
        .my-logo i {
            color: var(--accent-color);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        nav a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        nav a:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
            padding: 10px;
        }
        main {
            display: grid;
            grid-template-columns: 3fr 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }
        article {
            background-color: white;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        aside {
            background-color: white;
            padding: 20px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.5rem;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--secondary-color);
        }
        h2 {
            color: var(--primary-color);
            font-size: 1.8rem;
            margin: 30px 0 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-color);
        }
        h3 {
            color: var(--dark-color);
            font-size: 1.4rem;
            margin: 20px 0 10px;
        }
        h4 {
            color: var(--dark-color);
            font-size: 1.2rem;
            margin: 15px 0 8px;
        }
        p {
            margin-bottom: 15px;
            text-align: justify;
        }
        strong {
            color: var(--primary-color);
        }
        em {
            color: var(--accent-color);
        }
        ul, ol {
            margin-left: 20px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 8px;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 20px 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .info-box {
            background-color: var(--light-color);
            border-left: 4px solid var(--secondary-color);
            padding: 20px;
            margin: 20px 0;
            border-radius: var(--border-radius);
        }
        .warning-box {
            background-color: #fff3cd;
            border-left: 4px solid #ffc107;
            padding: 20px;
            margin: 20px 0;
            border-radius: var(--border-radius);
        }
        .card {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 20px;
            margin: 15px 0;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
            border: 1px solid #eee;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            box-shadow: var(--shadow);
        }
        th, td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        tr:hover {
            background-color: #e9ecef;
        }
        form {
            margin: 20px 0;
        }
        .form-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        button, .btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
            text-align: center;
            text-decoration: none;
            min-height: 44px;
            min-width: 44px;
        }
        button:hover, .btn:hover {
            background-color: #2980b9;
            transform: translateY(-2px);
        }
        .btn-accent {
            background-color: var(--accent-color);
        }
        .btn-accent:hover {
            background-color: #c0392b;
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .star {
            color: #ddd;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #ffc107;
        }
        .social-share {
            display: flex;
            gap: 10px;
            margin: 20px 0;
        }
        .social-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--light-color);
            color: var(--dark-color);
            transition: var(--transition);
        }
        .social-icon:hover {
            transform: translateY(-3px);
        }
        .facebook:hover { background-color: #3b5998; color: white; }
        .twitter:hover { background-color: #1da1f2; color: white; }
        .whatsapp:hover { background-color: #25d366; color: white; }
        #backToTop {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }
        #backToTop.show {
            opacity: 1;
            visibility: visible;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 40px 0 20px;
            border-radius: var(--border-radius) var(--border-radius) 0 0;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 15px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 10px 0;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            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;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            nav {
                width: 100%;
                margin-top: 15px;
                display: none;
            }
            nav.show {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 10px;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .article-image {
                margin: 15px 0;
            }
            .social-share {
                justify-content: center;
            }
            #backToTop {
                bottom: 20px;
                right: 20px;
                width: 44px;
                height: 44px;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 15px;
            }
            article, aside {
                padding: 20px;
            }
            .header-container {
                padding: 10px 0;
            }
            .my-logo {
                font-size: 1.8rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
        }
        @media print {
            header, aside, .social-share, #backToTop, footer, form, button {
                display: none !important;
            }
            body {
                max-width: 100%;
                padding: 0;
                background-color: white;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: none;
            }
        }