thank you for your reply. I will try toi do so.
Just for a better understanding. I work with wordpress for a couple of years now. In general, I use child themes and do not have any problems so far with custom css. Depends the functionality of custom css from the internal coding of the theme.
I thought, if wp do not find any custom css settings, it will use the css from the parent theme. The partent’s css comes witn an @import into the style.css of the child theme and should have a lower priority (means, the child#s css will overwrite the parent’s css.
Isn’t it correct?
If it will work as you described, it’s OK. I just want to avoid of loosing my custom css after a theme upsate,
Thanks & regards