How To Style Modal Contact Form Link

I’m using the modal contact form with the link such as follows:

Contact

My question is that if i want to turn the contact text into a nice looking CSS Button…how would i actually style this?

For example i want to use one of these buttons:
http://www.zurb.com/blog_uploads/0000/0617/buttons-03.html

but i need to style using class/css..any way to get around this?

Thanks!