How To Center Formmail

Hi, first of all, thanks for the great plugin. I’m trying to center all the fields in the Fast Secure Contact Form, but having no luck. I’ve tried modifying several of the “style settings” from “left” to “center,” but nothing seems to work…. and there are so many! Can someone please tell me how to easily center the formmail and its fields so it sits in the center of the page instead of to the far left? My form can be seen here: https://doyounu.com/ , then you must click CONTACT. Thanks very much for the help!