how to change the background color for the entry fields on a dark template?

The form looks ok, but when you go to type or select a field, there is a big white block behind it... I mean behind the entire question and entry field... not the actual field.

Where is the css to change that, or how to do that?

I like the dark template except for that.

thanks,

Christine

P.S. actually I meant to include the actual web page -- 

You can disable the highlight effect by following this screenshot.