Custom registration with wizard

I've followed this https://filamentphp.com/docs/3.x/panels/users#customizing-the-authentication-features and it's working, so questions. 1. How can I change width, I've tried this https://filamentphp.com/docs/3.x/panels/pages#customizing-the-maximum-content-width and not working. 2. How can I remove "sign up" button