Need Primary Menu to float right

Hello people,

What is the best way to get the menu of the site on the right side. It should look like the sticky menu which appears when scrolling down. I tried different things with margins and stuff but that didn’t really work out as expected. I thought maybe I missed an option in the generatepress settings? If someone could help me out, that would be awesome.

Thanks in advance and stay safe!
Sincerly,

schmark

The page I need help with: [log in to see the link]