Hello Blaz,
many thanks for your fast reply and also for your offer to help me – much appreciated!
Actually, I found the problem yesterday evening (that is why I marked the post as resolved later on). You are absolutely right: another plugin was overriding it. In this case, it was Learndash. The following code helped to solve the problem:
.learndash-wrapper .ld-focus .ld-tab-content li {
display: inline;
}
Thanks a lot again! ??
Best regards,
Mathias