centered site header

Hi, hoping someone can help on this...

My site has a centered logo in the header and I can't seem to make the navigation width bigger even with the site width and margins large, what am I missing?

Also, is it possible to have the navigation left and right of the central logo? The tech support where no help on this... maybe there's some code?

TIA

Nic

Hi Ziggy, thanks for your reply, here's the url for the site.

https://badger-oval-74a3.squarespace.com/home

Thanks for the link, I will have a look.

Thanks so much Ziggy for your suggestion!! I've dropped in the code from the link and all is working so far!