Add classes to WordPress basepage

Stackexchange user "Evan" wrote:

I was looking to restyle event pages (only) and began with the page with all events: '/civicrm/?page=CiviCRM&q=civicrm/event/ical&reset=1&list=1&html=1' This page, including individual events, and other public-facing pages created by CiviCRM have little to nothing in ways of identifying the page by unique IDs or descriptive Classes, especially at the very top of the parent hierarchy.

http://civicrm.stackexchange.com/questions/17403/html-event-pages-unspecific-ids-and-classes-at-the-top/

It seems like a good idea to add descriptive classes to the basepage that reflect the "page" that CiviCRM is displaying there.