* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
        html { scroll-behavior: smooth; }
        body { background-color: #f8f9fa; color: #333; line-height: 1.7; }
        img { max-width: 100%; height: auto; display: block; }
        h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); margin-bottom: 1.5rem; color: #2c3e50; border-bottom: 3px solid #3498db; padding-bottom: 0.5rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin: 2.5rem 0 1.2rem; color: #2980b9; }
        h3 { font-size: 1.5rem; margin: 2rem 0 1rem; color: #16a085; }
        h4 { font-size: 1.2rem; margin: 1.5rem 0 0.8rem; color: #8e44ad; }
        p { margin-bottom: 1.2rem; text-align: justify; }
        a { color: #3498db; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e74c3c; }
        strong { color: #e74c3c; font-weight: 700; }
        .lead { font-size: 1.2rem; font-weight: 300; color: #555; }
        .last-updated { font-style: italic; color: #7f8c8d; font-size: 0.95rem; margin-bottom: 2rem; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .site-header { background: linear-gradient(135deg, #2c3e50 0%, #4a6491 100%); color: white; padding: 1rem 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; }
        .header-container { display: flex; justify-content: space-between; align-items: center; }
        .my-logo { font-size: 2rem; font-weight: 800; color: #fff; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
        .my-logo span { color: #3498db; }
        .nav-desktop { display: flex; gap: 1.5rem; }
        .nav-desktop a { color: #ecf0f1; font-weight: 500; padding: 0.5rem 0; position: relative; }
        .nav-desktop a:hover { color: #3498db; }
        .nav-desktop a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: #3498db; transition: width 0.3s; }
        .nav-desktop a:hover::after { width: 100%; }
        .hamburger { display: none; font-size: 1.8rem; background: none; border: none; color: white; cursor: pointer; }
        .nav-mobile { display: none; flex-direction: column; background: #2c3e50; position: absolute; top: 100%; left: 0; width: 100%; padding: 1rem; box-shadow: 0 5px 10px rgba(0,0,0,0.2); }
        .nav-mobile.active { display: flex; }
        .nav-mobile a { color: #ecf0f1; padding: 0.8rem 0; border-bottom: 1px solid #34495e; }
        .nav-mobile a:last-child { border-bottom: none; }
        .breadcrumb { background-color: #ecf0f1; padding: 0.8rem 0; font-size: 0.9rem; margin-bottom: 2rem; }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb a:hover { color: #3498db; }
        .breadcrumb span { color: #34495e; }
        .main-content { display: grid; grid-template-columns: 1fr 300px; gap: 3rem; }
        .article-section { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .sidebar { background: white; padding: 1.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); align-self: start; position: sticky; top: 140px; }
        .featured-img { width: 100%; border-radius: 10px; margin: 2rem 0; border: 1px solid #ddd; }
        .interactive-module { background: #f1f8ff; border-left: 5px solid #3498db; padding: 1.5rem; margin: 2rem 0; border-radius: 0 8px 8px 0; }
        .form-group { margin-bottom: 1.2rem; }
        .form-group label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #2c3e50; }
        .form-control { width: 100%; padding: 0.8rem; border: 2px solid #bdc3c7; border-radius: 6px; font-size: 1rem; transition: border 0.3s; }
        .form-control:focus { border-color: #3498db; outline: none; }
        .btn { display: inline-block; background: #3498db; color: white; padding: 0.8rem 1.8rem; border: none; border-radius: 6px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: background 0.3s, transform 0.2s; }
        .btn:hover { background: #2980b9; transform: translateY(-2px); }
        .btn-block { width: 100%; }
        .rating { display: flex; gap: 0.5rem; margin: 1rem 0; }
        .star { font-size: 1.5rem; color: #ddd; cursor: pointer; transition: color 0.2s; }
        .star:hover, .star.active { color: #f39c12; }
        .comment { border-bottom: 1px solid #eee; padding: 1.2rem 0; }
        .comment:last-child { border-bottom: none; }
        .comment-author { font-weight: bold; color: #2c3e50; }
        .comment-date { font-size: 0.85rem; color: #95a5a6; }
        .site-footer { background: #2c3e50; color: #ecf0f1; padding: 3rem 0 1.5rem; margin-top: 4rem; }
        .footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
        .footer-widget h4 { color: #3498db; margin-bottom: 1.2rem; }
        friend-link { display: block; margin-bottom: 0.7rem; }
        friend-link a { color: #bdc3c7; }
        friend-link a:hover { color: #3498db; }
        .copyright { text-align: center; padding-top: 2rem; margin-top: 2rem; border-top: 1px solid #34495e; font-size: 0.9rem; color: #95a5a6; }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
            .sidebar { position: static; }
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .hamburger { display: block; }
            .header-container { position: relative; }
            .article-section { padding: 1.5rem; }
            h1 { font-size: 2rem; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            .btn { padding: 0.7rem 1.5rem; }
        }