They are nested in a physical sense, its simply not valid html. Im sure it was purely coincidental IE had a special mode to fix broken HTML on the fly, and one of the most popular beginner friendly web authoring tools generated strictly broken html
> They are nested in a physical sense, its simply not valid html.
For this to be true, you'd need containment to be a nontransitive relationship. In the sense in which h3 #2 is contained within h3 #1, all of the following hold:
> font-size: 1.17em;
I think this is default chrome value for h3 tags.