body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #e74c3c; margin-top: 1.5em; }
        h1 { font-size: 2.2em; border-bottom: 3px solid #f39c12; }
        h2 { font-size: 1.8em; }
        h3 { font-size: 1.4em; }
        .logo { font-size: 2.5em; font-weight: bold; color: #e74c3c; text-shadow: 2px 2px 4px #ff9800; }
        nav { background: #2c3e50; padding: 15px; margin-bottom: 20px; }
        nav ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; }
        nav ul li { margin: 0 15px; }
        nav ul li a { color: white; text-decoration: none; font-weight: bold; }
        .mobile-nav-toggle { display: none; background: #e74c3c; color: white; border: none; padding: 10px; cursor: pointer; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .download-btn, .login-btn { display: inline-block; background: #27ae60; color: white; padding: 12px 25px; margin: 15px 0; text-decoration: none; border-radius: 5px; font-weight: bold; }
        .login-btn { background: #3498db; }
        table { width: 100%; border-collapse: collapse; margin: 20px 0; }
        table, th, td { border: 1px solid #ddd; }
        th, td { padding: 12px; text-align: left; }
        th { background: #f2f2f2; }
        @media (max-width: 768px) {
            .mobile-nav-toggle { display: block; }
            nav ul { display: none; flex-direction: column; }
            nav ul.active { display: flex; }
            nav ul li { margin: 10px 0; text-align: center; }
        }