Hello @lucke-stz,
The CSS is not the problem.
Can you please try by clearing WordPress and browser cache.
When we view your site, it is working fine
https://prnt.sc/10lwv5u
https://prnt.sc/10lwvj7
https://prnt.sc/10lww39
https://prnt.sc/10lwwe5
https://prnt.sc/10lwwos
Can you please verify it.
Best Regards!