:root {
            --primary-color: #2ecc71;
            --secondary-color: #27ae60;
            --accent-color: #e74c3c;
            --dark-color: #2c3e50;
            --light-color: #ecf0f1;
            --text-color: #333;
            --text-light: #7f8c8d;
            --border-color: #ddd;
            --shadow: 0 4px 12px rgba(0,0,0,0.05);
            --max-width: 1200px;
            --nav-height: 70px;
        }
        * { 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: var(--text-color);
            background-color: #f9f9f9;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        main { flex: 1; }
        h1, h2, h3, h4 { color: var(--dark-color); margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: 2.5rem; border-bottom: 3px solid var(--primary-color); padding-bottom: 0.5rem; }
        h2 { font-size: 2rem; margin-top: 2.5rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border-color); }
        h3 { font-size: 1.5rem; margin-top: 1.8rem; }
        h4 { font-size: 1.2rem; margin-top: 1.5rem; color: var(--secondary-color); }
        p { margin-bottom: 1.2rem; }
        a { color: var(--secondary-color); text-decoration: none; transition: color 0.3s; }
        a:hover { color: var(--accent-color); }
        .lead { font-size: 1.2rem; color: var(--text-light); }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; }
        strong { font-weight: 700; }
        em { font-style: italic; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-top: 2rem;
        }
        @media (max-width: 992px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: var(--nav-height);
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
        }
        .logo a { color: inherit; }
        .my-logo { font-family: 'Georgia', serif; }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        nav a:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--primary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--dark-color);
        }
        @media (max-width: 768px) {
            nav ul {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 1.5rem;
                box-shadow: var(--shadow);
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.3s ease;
                gap: 1rem;
            }
            nav.active ul {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .hamburger { display: block; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .info-box {
            background: #f8f9fa;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1.5rem;
            margin: 2rem 0;
            float: right;
            width: 300px;
            margin-left: 2rem;
        }
        .info-box h3 { margin-top: 0; border-bottom: 1px dashed var(--border-color); padding-bottom: 0.5rem; }
        .info-box ul { list-style: none; padding-left: 0; }
        .info-box li { margin-bottom: 0.8rem; padding-left: 1.5rem; position: relative; }
        .info-box li:before { content: '•'; color: var(--primary-color); position: absolute; left: 0; }
        @media (max-width: 768px) {
            .info-box { float: none; width: 100%; margin-left: 0; }
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: calc(var(--nav-height) + 1rem);
        }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-widget h3 { font-size: 1.3rem; margin-bottom: 1rem; color: var(--dark-color); border-bottom: 2px solid var(--primary-color); padding-bottom: 0.5rem; }
        .sidebar ul { list-style: none; }
        .sidebar li { margin-bottom: 0.8rem; padding-left: 1rem; border-left: 3px solid transparent; transition: all 0.3s; }
        .sidebar li:hover { border-left-color: var(--primary-color); padding-left: 1.2rem; }
        .sidebar a { display: block; }
        .article-img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 1.5rem 0;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            border: 1px solid var(--border-color);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: -0.5rem;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }
        .gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            background: white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        th, td {
            border: 1px solid var(--border-color);
            padding: 1rem;
            text-align: left;
        }
        th {
            background-color: #f2f8f5;
            font-weight: 700;
            color: var(--dark-color);
        }
        tr:nth-child(even) { background-color: #f9f9f9; }
        .btn {
            display: inline-block;
            background: var(--primary-color);
            color: white;
            padding: 0.8rem 1.8rem;
            border-radius: 5px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s;
            text-align: center;
            min-height: 44px;
            min-width: 44px;
        }
        .btn:hover {
            background: var(--secondary-color);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(46, 204, 113, 0.2);
        }
        .btn-secondary {
            background: var(--dark-color);
        }
        .btn-secondary:hover { background: #1a252f; }
        .btn-block { display: block; width: 100%; }
        .btn-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin: 1.5rem 0;
        }
        @media (max-width: 576px) {
            .btn-group { flex-direction: column; }
        }
        form {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border: 1px solid var(--border-color);
        }
        .form-group { margin-bottom: 1.2rem; }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.2);
        }
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .badge {
            display: inline-block;
            background: var(--accent-color);
            color: white;
            padding: 0.2rem 0.6rem;
            border-radius: 12px;
            font-size: 0.8rem;
            font-weight: 700;
            vertical-align: middle;
        }
        .toc {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border-left: 4px solid var(--primary-color);
        }
        .toc h3 { margin-top: 0; }
        .toc ul { list-style: none; padding-left: 1rem; }
        .toc li { margin-bottom: 0.5rem; }
        .toc a { color: var(--dark-color); }
        .update-tag {
            background: #ffeaa7;
            color: #d35400;
            padding: 0.3rem 0.8rem;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-left: 1rem;
        }
        .social-share {
            display: flex;
            gap: 0.8rem;
            margin: 2rem 0;
            justify-content: center;
        }
        .social-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.2rem;
            transition: transform 0.3s;
        }
        .social-icon:hover { transform: scale(1.1); }
        .facebook { background: #3b5998; }
        .twitter { background: #1da1f2; }
        .whatsapp { background: #25d366; }
        .telegram { background: #0088cc; }
        #backToTop {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--dark-color);
            color: white;
            border: none;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }
        #backToTop.show {
            opacity: 1;
            visibility: visible;
        }
        #backToTop:hover { background: var(--primary-color); }
        footer {
            background: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            border-bottom: 2px solid var(--primary-color);
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #bdc3c7; }
        .footer-links a:hover { color: white; }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #bdc3c7;
            font-size: 0.9rem;
        }
        .rating-widget {
            background: #fff;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            padding: 1.5rem;
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #f1c40f;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars i { margin: 0 0.2rem; transition: transform 0.2s; }
        .stars i:hover { transform: scale(1.2); }
        .user-review {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1.2rem;
            margin-bottom: 1.5rem;
        }
        .user-review-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.8rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .user-review-rating { color: #f39c12; }