Logo Width

Hello,

I do like this theme allot, it’s clean, fast and easy to use.
However, i got 1 challange.
I want to add a webitse logo on the top op the website.
So i go to Site identity, add the logo and set the Width to 1080, however the logo stays really small.
What i want is to get it as Width as the Header Image can be set, site Width.

How can i do this?

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