Weird empty space

Hi there!

I'm having some issues with the top bar... There's a weird white space underneath it that doesn't seem to be made by padding/margin. Do you have any ideas?

The URL is https://mattt.is/telefooncenter/winkel/

This is the normal white space: https://www.dropbox.com/s/2iyyizt5pwdghf9/Screenshot%202021-02-13%20at%2016.35.21.png?dl=0
This is what it looks like now: https://www.dropbox.com/s/48usvgsawv2z34p/Screenshot%202021-02-13%20at%2016.34.57.png?dl=0

Could you help?

Best,
Matt