Sticky menu too big because of changes to menu

Hello,

I have made some custom CSS to make my menu slimmer and to make the action button fill the menu etc. Now I'd like to have a sticky menu on my website, but when I add the sticky menu it gets all messed up. Is there any way you guys can help me with some custom css to make the sticky menu look exactly the same as the normal menu?

I have attached a picture of the sticky menu: https://imgur.com/a/Ecti0.
The website is: www.loverne.dk.

I have disabled the sticky menu for now, because of the visual issue, because we have a lot of visitors on the site. I hope for your understanding and hope that there is a fix - if not we understand.