[Theme: Twenty Fourteen] Can't make the header bigger.

Hello everyone.

My question is about the theme: Twenty Fourteen.

I changed the stylesheet a little cause I want it all over my page. The header and the menu.

My menu is at the end of the right side, but my header won’t move with it. I changed the header to 1652px too. I don’t know what I did wrong?

https://www.cocoblond.com – you can see it there.