Submit Button Is Text, Not a Button?

I've looked thru numerous forums and played around with the CSS, but it seems as if every single form I create with Gravity Forms, it creates a Submit Button, that overrides the default styling of standard HTML and create a Submit Button that is simply text, rather than an actual Submit Button. This is very confusing to users because they expect a submit button in HTML to act in certain ways (it "goes down" when pressed) and now all they see is text ("Submit"). I've played around with the CSS to create a hover effect, but I'd love to know how I can get Gravity Forms to create a Submit button that is just a button, like every other HTML form. I'm not using images for the form, just straight HTML. How do you do this? Thanks.

Thanks. I actually did alot of digging today and this problem seems to be due to the fact that I use the Thesis theme. This theme adds alot of CSS for input form buttons that override Gravity Forms. I am guessing I'll have to hack Thesis's CSS a bit to fix the issues.