Responsive Nav issues and spacing

Hello there,

I have a couple issues with my Navigation. After D4Z’s help, I now have my Nav showing up in the same place, scroll or no scroll. But,
on Scroll, the navigation is moving from normal size to the slightly reduced size nav items… shrinking the nav bar and making it appear to move in height. Is there a simple CSS line to keep the nav bar the same padding styles on scroll as on normal load?

Also, a second issue is.. in my Responsive nav, all the items look decent, but the top level menu items li(a are seemingly close together, looking squished. I know its a spacing issue, but not sure what selector to use to make the adjustment.

Here is my site:
https://rudolfconstruction.outputva.com/

I appreciate your help in advance!

Thanks!
-Mike