Adjust header height (extra css)

Hi everyone,

I am pretty new to all of this and happy with the way my website looks right now, but I want to change the height of the header (there used to be a big picture there, that came with the theme). As you can see on the website (click on the link), the size is too big for my standard image I always use. Height should be smaller and maybe even a bit less wide. My question is: how do I change this? So I want to remove the white spaces around the logo. I know that under appearance > customizer > extra CSS, you can change things, but it does not seem to change anything….

Thanks a lot in advance!

• This topic was modified 4 years ago by Steven Stern (sterndata).

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