How to change height of Header

Hi. I've been looking through Gavick Pixellove's css files and I can seem to find a way to edit both the height of the nav bar and logo. I really don't understand how are the style sheets set up in Pixellove. It's completely different.

Is there a way I can change the height nav bar of pixellove. Knowing so may also give me a hint to changing the height of the logo also.

Thanks in advance

Btw i'm using the light colored version of pixellove and Style #1 (blue) which I believe is the default style.

Thanks again.