Cover Image not responsive

Hi there,
I recently set up a new website with WP 6 and Twenty Twenty Two Theme. As header image I used a Cover block. It can be seen here: (
It looks fine on desktop screens, but sucks on mobile. There the pic seems stretched and edgy, while only a narrow area in the middle of the image can be seen. It also is far too high and covers 3/4 of my mobile phone screen.

I just would like to have that image scaled down accordingly so mobile users can see the whole image.

I searched for this problem and found some suggestions to add custom CSS code, but this didn’t work for me and I can’t tell why.

Can someone help?

Thanks and cheers!

• This topic was modified 2 years, 10 months ago by Jan Dembowski.

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