The menu colours are driving me insane

Hello,

I have finished a website using your onetone theme that I am unbelievably happy with… however the very last thing I need to change before the site goes live is the menu background and font colours, when i change the pc menu it effect the mobile versions menu and I need to have the colours on the pc menu different to the mobile menu colours. Is there anyway to adjust them all independently?

While trying to work out how to do this I have somehow given part of my menu a black background… could you also tell me how to fix this too? haha!

You can see the site at http://www.buryadvertising.com as well as view the image below

http://s32.postimg.org/reg8jowqt/menuwrong.jpg

Thank you