Got it!
I see Ccomment relies on the current template nesting rule for <ul> tags. In my case, for some reason, it has been set by the template owners to... no margin at all.
Getting the code from your Ccomment css template page I added:
.ccomment-replies{
margin: 0.5em 0;
margin: 0 0 0 2em;
}
in /media/com_comment/templates/default/css/default.css
In this way (I suppose) it overrides my template css for that specific class and now it looks great!
I don't know if this override will work in any case, but if it is so... maybe it would be useful to add it to the component css by default? So that it will be independent by some weird template setting. Just a suggestion, eheh. Have a good day guys!