Changing Header/Nav Width.

Site URL: https://bobbyford.io/

As seen in the below, my Press Kit page/nav is below the nav vs to the right of my store. There is plenty of room and I will be adding a few more links, so I need to adjust the head nav width. I'm on 7.1 using the new liquid (?) design tool. I would really appreciate any code or advice. 

Thanks
Bobby

I have been able to adjust enough to get it to show as one line but cannot add any additional nav links (I'll need to add 2 more by next year). So any code that lets me increase the nav space width to get those links added would be appreciated

I never got notified on this, Tuan. Thanks for the help!