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, #0069d9, #00c851); color: white; padding: 20px; border-radius: 10px; margin-bottom: 30px; }
        .logo { font-size: 2.5em; font-weight: bold; text-shadow: 2px 2px 4px rgba(0,0,0,0.3); }
        nav ul { list-style: none; padding: 0; display: flex; gap: 20px; }
        nav li { display: inline; }
        nav a { color: white; text-decoration: none; }
        .mobile-menu { display: none; }
        @media (max-width: 768px) {
            nav ul { display: none; }
            .mobile-menu { display: block; }
            .logo { font-size: 1.8em; }
        }
        h1 { color: #0069d9; border-bottom: 2px solid #00c851; padding-bottom: 10px; }
        h2 { color: #007bff; margin-top: 30px; }
        h3 { color: #17a2b8; }
        .download-btn { background: #28a745; color: white; padding: 12px 25px; border-radius: 30px; text-decoration: none; font-weight: bold; display: inline-block; margin: 15px 0; }
        .login-btn { background: #007bff; color: white; padding: 12px 25px; border-radius: 30px; text-decoration: none; font-weight: bold; display: inline-block; margin: 15px 0; }
        .highlight { background: #fffde7; padding: 5px 10px; border-radius: 5px; }
        footer { margin-top: 50px; padding: 20px; background: #f8f9fa; border-top: 2px solid #e9ecef; }
        img { max-width: 100%; height: auto; border-radius: 10px; margin: 20px 0; }