* { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #3498db;
            --light: #ecf0f1;
            --dark: #1a252f;
            --text: #333;
            --gray: #95a5a6;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
            --border-radius: 8px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background-color: #f9f9f9;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a { color: var(--accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 2em; margin: 1em 0; }
        .container { width: 100%; padding-right: 15px; padding-left: 15px; margin-right: auto; margin-left: auto; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            color: white;
            padding: 1.5rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.2rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span:first-child { color: var(--secondary); }
        .my-logo span:last-child { color: var(--accent); }
        .my-logo:hover { text-decoration: none; opacity: 0.9; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
            margin: 0;
            padding: 0;
        }
        .main-nav a {
            color: var(--light);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover { color: white; text-decoration: none; }
        .main-nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--secondary);
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .mobile-nav {
            display: none;
            width: 100%;
            background-color: var(--dark);
            padding: 1rem;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .mobile-nav.active { display: block; }
        .mobile-nav ul { list-style: none; }
        .mobile-nav li { margin: 0.8rem 0; }
        .mobile-nav a { color: white; display: block; padding: 0.5rem; }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .breadcrumb a { color: var(--gray); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb span { margin: 0 5px; }
        main { display: grid; grid-template-columns: 1fr 300px; gap: 2.5rem; margin: 2rem 0; }
        @media (max-width: 992px) { main { grid-template-columns: 1fr; } }
        .article-content { background: white; padding: 2.5rem; border-radius: var(--border-radius); box-shadow: var(--shadow); }
        .sidebar { background: white; padding: 2rem; border-radius: var(--border-radius); box-shadow: var(--shadow); align-self: start; }
        h1 { font-size: 2.8rem; color: var(--primary); margin-bottom: 1.5rem; line-height: 1.2; border-bottom: 3px solid var(--secondary); padding-bottom: 0.5rem; }
        h2 { font-size: 2.1rem; color: var(--dark); margin: 2rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--light); }
        h3 { font-size: 1.6rem; color: var(--primary); margin: 1.8rem 0 1rem; }
        h4 { font-size: 1.3rem; color: #555; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        .lead { font-size: 1.25rem; font-weight: 300; color: var(--dark); margin-bottom: 2rem; padding-left: 1rem; border-left: 4px solid var(--accent); }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; font-weight: 600; }
        strong { color: var(--primary); }
        .featured-img {
            width: 100%;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            border: 1px solid #ddd;
            overflow: hidden;
        }
        .featured-img figcaption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            padding: 0.5rem;
            font-size: 0.9rem;
        }
        .interaction-module {
            background: #f8f9fa;
            border-left: 4px solid var(--accent);
            padding: 1.5rem;
            margin: 2.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .interaction-module h3 { margin-top: 0; color: var(--accent); }
        .form-group { margin-bottom: 1rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        input, select, textarea {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2); }
        .btn {
            display: inline-block;
            background-color: var(--accent);
            color: white;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .btn:hover { background-color: var(--secondary); color: white; text-decoration: none; }
        .rating { display: flex; gap: 5px; margin: 1rem 0; }
        .star { font-size: 1.8rem; color: #ddd; cursor: pointer; transition: var(--transition); }
        .star:hover, .star.active { color: #f1c40f; }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-widget h3 { font-size: 1.4rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--light); margin-bottom: 1rem; }
        .sidebar-links { list-style: none; padding-left: 0; }
        .sidebar-links li { margin-bottom: 0.8rem; padding-bottom: 0.8rem; border-bottom: 1px dotted #eee; }
        .sidebar-links a { display: flex; align-items: center; gap: 10px; color: var(--text); }
        .sidebar-links a:hover { color: var(--accent); }
        .sidebar-links i { color: var(--gray); width: 20px; }
        footer {
            background-color: var(--dark);
            color: var(--light);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
            border-top: 5px solid var(--secondary);
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-widget h3 { color: white; margin-bottom: 1.5rem; font-size: 1.4rem; }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            margin: 0 0.5rem 0.5rem 0;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        friend-link:hover { background: var(--accent); color: white; text-decoration: none; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #bdc3c7;
            font-size: 0.9rem;
        }
        .last-updated {
            text-align: right;
            font-style: italic;
            color: var(--gray);
            font-size: 0.9rem;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #eee;
        }
        @media (max-width: 768px) {
            .header-container { flex-direction: column; align-items: flex-start; }
            .main-nav { display: none; }
            .hamburger { display: block; align-self: flex-end; margin-top: -3rem; }
            .article-content, .sidebar { padding: 1.5rem; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .footer-container { grid-template-columns: 1fr; }
        }