body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #e67e22; text-align: center; }
        h2 { color: #2980b9; border-bottom: 2px solid #f39c12; padding-bottom: 5px; }
        h3 { color: #27ae60; }
        .logo { font-size: 28px; font-weight: bold; color: #e67e22; text-shadow: 1px 1px 2px #ccc; }
        .nav { display: flex; justify-content: space-around; background: #34495e; padding: 10px; margin-bottom: 20px; }
        .nav a { color: white; text-decoration: none; }
        .mobile-toggle { display: none; }
        .download-btn { display: block; background: #27ae60; color: white; padding: 10px; text-align: center; margin: 20px 0; border-radius: 5px; }
        .login-btn { display: block; background: #3498db; color: white; padding: 10px; text-align: center; margin: 20px 0; border-radius: 5px; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .footer { margin-top: 40px; text-align: center; padding: 20px; background: #34495e; color: white; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; display: none; }
            .nav.active { display: flex; }
            .mobile-toggle { display: block; background: #e67e22; color: white; padding: 10px; text-align: center; cursor: pointer; }
        }