I'm picking over Eric Schulte's web page (http://www.cs.unm.edu/~eschulte/),
and the base .org file it came from, and I see he has given his outline
headers (level **) a PROPERTIES drawer:

:PROPERTIES:
:CUSTOM_ID: research
:END

then in his .css file he has this:

#outline-container-research
{
   padding-top: 100px;
}

I can't find any sort of code that would be associating these two, so I
must assume this is a built-in org-mode HTML export feature. Is this true?
(Not really understanding the manual on HTML CSS, either.) If not, how are
these two associated?

LB