body { font-family: 'Arial', sans-serif; line-height: 1.6; margin: 0; padding: 0; background: #f8f2e4; color: #333; }
        .header { background: #ff6b35; color: white; padding: 15px; text-align: center; position: relative; }
        .header-logo { font-size: 24px; font-weight: bold; text-transform: uppercase; }
        .nav { display: flex; justify-content: center; gap: 20px; margin: 10px 0; }
        .nav a { color: white; text-decoration: none; }
        .mobile-toggle { display: none; position: absolute; right: 20px; top: 20px; }
        .content { max-width: 800px; margin: 20px auto; padding: 0 20px; }
        .download-btn { background: #4CAF50; color: white; padding: 10px 20px; text-align: center; margin: 15px 0; display: inline-block; }
        .login-btn { background: #2196F3; color: white; padding: 10px 20px; text-align: center; margin: 15px 0; display: inline-block; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .footer { background: #333; color: white; text-align: center; padding: 15px; margin-top: 30px; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; display: none; }
            .mobile-toggle { display: block; }
            .nav.active { display: flex; }
        }