:root {
            --primary-color: #4CAF50;
            --secondary-color: #2196F3;
            --accent-color: #FF9800;
            --dark-color: #2C3E50;
            --light-color: #F8F9FA;
            --text-color: #333;
            --border-color: #E0E0E0;
            --shadow: 0 2px 8px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 1rem 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .my-logo:hover {
            color: var(--secondary-color);
        }
        nav {
            display: flex;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            background-color: var(--light-color);
            color: var(--primary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark-color);
            cursor: pointer;
            padding: 10px;
            min-width: 44px;
            min-height: 44px;
        }
        .search-container {
            margin: 2rem 0;
            background: var(--light-color);
            padding: 1.5rem;
            border-radius: 8px;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            min-width: 44px;
            min-height: 44px;
        }
        .search-btn:hover {
            background-color: var(--secondary-color);
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin: 2rem 0;
        }
        @media (max-width: 1024px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--dark-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--dark-color);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.1rem;
            color: var(--primary-color);
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .content-box {
            background: var(--light-color);
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 4px;
        }
        .tip-box {
            background: #E8F5E9;
            border-left: 4px solid var(--primary-color);
        }
        .warning-box {
            background: #FFF3E0;
            border-left: 4px solid var(--accent-color);
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
            display: block;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            background: white;
            box-shadow: var(--shadow);
            border-radius: 8px;
            overflow: hidden;
        }
        th {
            background-color: var(--dark-color);
            color: white;
            padding: 1rem;
            text-align: left;
        }
        td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
        }
        tr:hover {
            background-color: var(--light-color);
        }
        aside {
            position: sticky;
            top: 100px;
            height: fit-content;
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .sidebar-section {
            margin-bottom: 2rem;
        }
        .sidebar-section h3 {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: var(--dark-color);
        }
        .rating-container {
            text-align: center;
            padding: 1rem;
            background: var(--light-color);
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        .stars {
            color: #FFD700;
            font-size: 1.5rem;
            margin: 0.5rem 0;
        }
        .social-share {
            display: flex;
            gap: 0.5rem;
            justify-content: center;
            margin: 1.5rem 0;
            flex-wrap: wrap;
        }
        .social-btn {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            transition: var(--transition);
        }
        .facebook { background: #3b5998; }
        .twitter { background: #1da1f2; }
        .pinterest { background: #bd081c; }
        .whatsapp { background: #25d366; }
        .social-btn:hover {
            transform: translateY(-3px);
            opacity: 0.9;
        }
        .comment-form, .rating-form {
            background: var(--light-color);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--border-color);
            border-radius: 4px;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            min-width: 44px;
            min-height: 44px;
        }
        .submit-btn:hover {
            background-color: var(--secondary-color);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
            border-radius: 8px 8px 0 0;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #ddd;
            text-decoration: none;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 999;
            min-width: 44px;
            min-height: 44px;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            body {
                padding: 0 15px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            nav {
                width: 100%;
                margin-top: 1rem;
                display: none;
            }
            .nav-links {
                flex-direction: column;
                width: 100%;
                gap: 0.5rem;
            }
            .nav-links a {
                display: block;
                padding: 12px 16px;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1rem;
                right: 0;
            }
            .nav-active {
                display: block;
            }
            article, aside {
                padding: 1.5rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input, .search-btn {
                width: 100%;
                border-radius: 4px;
                margin-bottom: 0.5rem;
            }
        }
        @media (max-width: 480px) {
            html {
                font-size: 14px;
            }
            .social-share {
                justify-content: space-around;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            .back-to-top, .social-share, .rating-form, .comment-form, nav, .hamburger {
                display: none !important;
            }
            body {
                background: white;
                color: black;
                max-width: 100%;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }