remvoing margins

I am creating a form that will be embedded on a webpage. I am looking to remove all margins, but primarily the header and footer so there isn't space between the top of the form and the first question. I've tried adding some code and it hasn't worked so far. Any ideas? Here's some of the code I found on previous discussions that I tried: .Skin #Logo { height: 0px !important; } .Skin .SkinInner { padding-top: 0px !important; } .Skin label.QuestionText { display: unset; }