Change width of menu?

So I am currently making my first website and after loads of researching and blablabla, I still cannot manage to find a way to change the width of the menu at the top. I want all the elements to fit into one line but for some reason two of the links drop down on a second line. Is there anyway to change this? Any script or anyhting?
BTW I’m already running my child theme for any CSS changes.
Any help would be appreciated! Thanks!
My Website:
http://www.NomadaProductions.com