body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        header { background: linear-gradient(135deg, #ff9900, #ff3300); padding: 15px; color: white; border-radius: 8px; margin-bottom: 30px; }
        .logo { font-size: 2.2em; font-weight: bold; letter-spacing: 1px; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .mobile-menu { display: none; cursor: pointer; }
        h1 { color: #e74c3c; border-bottom: 3px solid #f39c12; padding-bottom: 10px; }
        h2 { color: #2980b9; margin-top: 35px; }
        h3 { color: #27ae60; }
        .download-btn, .login-btn { display: inline-block; background: #2ecc71; color: white; padding: 12px 25px; margin: 15px 0; border-radius: 25px; text-decoration: none; font-weight: bold; }
        .login-btn { background: #3498db; }
        .highlight { background: #fffde7; padding: 8px; border-left: 4px solid #ff9800; }
        img { max-width: 100%; height: auto; border-radius: 8px; margin: 20px 0; }
        footer { margin-top: 50px; padding: 20px; background: #34495e; color: white; border-radius: 8px; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-menu { display: block; }
            .logo { font-size: 1.8em; }
        }