:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-bg: #f8f9fa;
            --dark-text: #2c3e50;
            --light-text: #7f8c8d;
            --border-color: #ecf0f1;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--dark-text);
            background-color: #fff;
        }
        header {
            background-color: #fff;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
            padding: 15px 0;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            color: var(--accent-color);
            margin-right: 10px;
        }
        .nav-desktop {
            display: flex;
            gap: 25px;
        }
        .nav-desktop a {
            text-decoration: none;
            color: var(--dark-text);
            font-weight: 500;
            padding: 5px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-desktop a:hover {
            color: var(--secondary-color);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
            padding: 10px;
        }
        .nav-mobile {
            display: none;
            width: 100%;
            flex-direction: column;
            background-color: #fff;
            padding: 20px;
            box-shadow: inset 0 5px 5px -5px rgba(0,0,0,0.1);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 12px 0;
            text-decoration: none;
            color: var(--dark-text);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .nav-mobile a:hover {
            color: var(--secondary-color);
            padding-left: 10px;
        }
        .main-container {
            max-width: 1200px;
            margin: 30px auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        article {
            background: #fff;
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        aside {
            background: var(--light-bg);
            padding: 25px;
            border-radius: 8px;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--secondary-color);
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin: 35px 0 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--dark-text);
            margin: 25px 0 15px;
        }
        h4 {
            font-size: 1.1rem;
            color: var(--light-text);
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--primary-color);
            font-weight: 500;
            margin-bottom: 25px;
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 20px;
        }
        li {
            margin-bottom: 8px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: var(--shadow);
        }
        th, td {
            padding: 15px;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background-color: var(--light-bg);
        }
        .article-img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 25px 0;
            box-shadow: var(--shadow);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--light-text);
            margin-top: -15px;
            margin-bottom: 25px;
        }
        .btn {
            display: inline-block;
            padding: 12px 25px;
            background-color: var(--secondary-color);
            color: white;
            border: none;
            border-radius: 5px;
            text-decoration: none;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            min-height: 44px;
            min-width: 44px;
        }
        .btn:hover {
            background-color: #2980b9;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .btn-accent {
            background-color: var(--accent-color);
        }
        .btn-accent:hover {
            background-color: #c0392b;
        }
        .search-form {
            display: flex;
            margin: 25px 0;
        }
        .search-input {
            flex: 1;
            padding: 15px;
            border: 2px solid var(--border-color);
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-btn {
            padding: 15px 25px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #1a252f;
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 20px 0;
        }
        .stars {
            color: #f1c40f;
            font-size: 1.5rem;
        }
        .share-buttons {
            display: flex;
            gap: 15px;
            margin: 30px 0;
        }
        .share-btn {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: var(--transition);
        }
        .facebook { background-color: #3b5998; }
        .twitter { background-color: #1da1f2; }
        .pinterest { background-color: #bd081c; }
        .whatsapp { background-color: #25d366; }
        .share-btn:hover {
            transform: scale(1.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
        }
        .comment-form {
            background: var(--light-bg);
            padding: 25px;
            border-radius: 8px;
            margin: 40px 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .infobox {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 30px;
        }
        .infobox h3 {
            margin-top: 0;
            text-align: center;
        }
        .infobox img {
            width: 100%;
            border-radius: 5px;
            margin-bottom: 15px;
        }
        .infobox dl {
            display: grid;
            grid-template-columns: auto 1fr;
            gap: 10px 20px;
        }
        .infobox dt {
            font-weight: 600;
        }
        .update-log {
            background-color: #e8f4fc;
            border-left: 4px solid var(--secondary-color);
            padding: 20px;
            margin: 30px 0;
            border-radius: 0 8px 8px 0;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 50px 20px 30px;
            margin-top: 60px;
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 15px 0;
        }
        .copyright {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #bdc3c7;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .share-buttons {
                justify-content: center;
            }
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .search-form {
                flex-direction: column;
            }
            .search-input, .search-btn {
                border-radius: 5px;
                margin-bottom: 10px;
            }
            .btn {
                display: block;
                width: 100%;
                margin-bottom: 15px;
            }
        }