Remove space between navbar and content

Hi,

I can’t find a solution to remove the space between my image and my navbar
If you look closely you see two different spaces, one below the navbar and one above the image.
I would like to delete the space above the image.
anybody who has some custom css for this?

My theme is pinboard and my site is not yet online but here is a prt screen: http://oi57.tinypic.com/qy79l3.jpg

Ps: I have Firebug so i can look something up, but i don’t know what & how

thanks!