adding and styling fields in Biblio module

Apologies for posting also in Biblio - I think this is a better forum in which to post.
Two things I don't understand, possibly connected:

1) how to style Biblio output
I have got some control - WebDeveloper/Firefox showed me the output is:
{ table tbody tr.even, table tbody tr.even td.menu-disabled }
which I can affect in style.css.

Then I added a field, 'research area' to the biblio content type, and can't affect that field's appearance.
It's a text pop-up. It shows up in WebDev as a field of three rows:
----------------------------------------------------------------------------------------------------
div #page-wrapper > div #main-wrapper > div #content-region-both > div #node-2 .node clear-block > div .content
> div .field field-type-text field-field-research-area
> div .field field-type-text field-field-research-area > div .field-items
> table #attachements > thead > tr
----------------------------------------------------------------------------------------------------

Those div ids are not in style.css (of course) and not in biblio.css (I guess Biblio can't provide styles for fields that don't exist yet!). But is there a default style for user-added fields? If so, where is it?
If not, then I guess I must create one. In that case, should I copy biblio.css to my theme folder and do the overriding there?

2) What is the proper way to add fields to that content type? (not strictly Theme-related but it may be affecting the Theming)
When I Display fields in the Biblio module, the only one which shows up is the one I added.
When I Manage fields, all the fields appear.
WebDev or Firebug shows the added field is being treated separately from the biblio style:
(carets omitted as the editor doesn't seem to like displaying content within carets):

div class="content"
div id="biblio-node" /div
div class="field field-type-text field-field-research-area" /div [ the added field ]
table id="attachements"
/div
etc.

There's no biblio-node id in biblio.css.

Thanks for reading - any suggestions?