How can I remove white space from about the "thank you" page?

I have a form embedded in a WordPress.com post (so, not using the script approach, using the short code [embed] approach). I set up the CSS to remove extra padding from above and below the form and it works great.

I have a "thank you message" defined for the form that I have formatted using the rich text editor in JotForm. Everything looks good except when this page is presented embedded in my WordPress post, the padding above the "page" is back and it messes up my layout.

How can I removed that extra white space above the "thank you message?" Is there a CSS approach to this like there was for removing the white space above the form itself?

Thanks.

Jim

Thanks for the quick response. How would you target that CSS to the thank you page? I put in the CSS needed to get the margin and padding right for the form itself but it doesn't affect the thank you page. What would the entire CSS entry look like? Or should this snippet go in the HTML for the table itself in the thank you message? I tried that and it didn't seem to work (or stay put -- any touch to the wysiwyg editor erased this addition.

Thanks for the additional information.

Jim 

Thanks. Worked perfectly. Really appreciate the fast turn around.

Related question: the thank you message needs less space on the page than the form did. Is it possible to resize, so the text that follows the form / thank you message area doesn't seem to be pushed down so far?

Jim