I'm sorry if this has been asked before but I've been looking all over the place to find out how to customize the look of radio buttons and checkboxes for forms built with Visual Form Builder. No matter what I try with the CSS (ie. adding to the existing styles or writing a new style based on the classes that define them), they remain their default selves. Ideally, I'd like them to appear flat with a background colour and a border.
Is this possible?