Own Logo too big in mobile version

Hi there!

I added my own Logo into the theme, in 150 x 150 px which was recommended by wordpress.

In the browser version I think it is way too small. But in the mobile version it is way too big!

I want the Logo to be bigger when viewing on the browser and
I want the Logo to be smaller when viewing on mobile.

Got to my website https://www.nadjakuschel.com to see what I mean.

Is there any way to fix this?

Thanks in advance!
Nadja

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