I finally figured where the problem came from: a bad edit on my function.php
Thanks to you I stopped wasting time on my stylesheet
Cheers!
Thank you for your help,
since your answer, I’ve been trying to follow your instructions and find the modif that caused the issue. So far, my attempts have been unsuccessful.
At this stage, I’ll check the files one by one and compare them with the unmodified theme to find out.
Thanks again 🙂