Applying CSS to unique question error message?

The error page that comes up when a user submits an entry for the same email address does not follow the theme that I have set up. Is there a way to apply CSS or edit the error page? I attached a screenshot. Thanks!

Thank you for contacting us.

Unfortunately, there is no way to style mentioned page at this time. I have attached a feature request ticket to this thread and escalated it to our Development Team for consideration.

We will let you know if we have any updates on this.

Thank you! This large message cuts off on some of our webpages and looks pretty bad. We are trying to keep everything uniform.