This is insane. Why can't custom CSS be an option of FormsCentral? I understand that it isn't really designed for designers. But wouldn't it make more sense if it were an option? I want my buttons an forms to look like the rest of my site. Now I have to go and adjust everything with JQuery. You just alienated designers, for what reason? You only want to provide solutions for the lowest common denominator? Are you following the IE business model?
CSS is not currently supported in FormsCentral. If you want to see it in the future, please submit your feature request or vote on an existing one at http://forums.adobe.com/community/formscentral?view=idea. We use this list to prioritize new features to add to the product.