No worries, when you created your project it should have automatically created an app.scss page. At the bottom of that page, paste the following and you should be able to click on the radio button to have showAlert() run and the company name to have showAccountDetails(account) run. If your project is set up to have a .scss file for each page, you could paste it there instead so that the change only affects that one page too.
.radio > button {
width: 0;
}
Let me know if that works for you.