Hi Mary, hi Richard
Sorry, my CSS is rusty, or this YUI beats me (or both).
First the selector: I am convinced that
.course-content li.section li.activity ul
is the right one.
ul, ul ul, ul ul ul, ul ul ul ul, ul ul ul ul ul
touches just too many things, as found out with my red paint method.
The properties: I tried
{list-style-type: circle !important; list-style-position: outside; list-style-image none; }
and other variations of it. No reaction.
I find FireBug doesn't tell me much about the CSS cascades. May be, I don't understand it. So, I am still stuck.
Edit: 'list-style-position: inside;' rather than 'list-style-position: outside;' gives me an acceptable solution (see screen-shot). So the final solution is
.course-content li.section li.activity ul {list-style-type: disc; list-style-position: inside; list-style-image none; }
. Thank you both for all your support!