Wedding Bells – changing the size of the header

Hi –
I cannot figure out how to change the size of the header – it’s too big with too much white space. I want the nav bar to move up to cover some of that white space.
Website address: https://pmc.pratt.edu/~jmaher/wordpress/

My deadline is tomorrow end of day, Wednesday 06/29/11 if anyone can help out.

Thanks!