How to make logo overlap the menu header container...

Hi,
How can I make the logo overlap the menu (links) header container and reduce the height (not the width) of it. The idea is to make logo come above the menu header container and reduce the mega menu links height for more spaces. Screenshot: http://awesomescreenshot.com/07b524o2a4
url: http://sportvision.barniwebs.com

Regards