What selectors in the css files are used to style the finished HTML table?

Link to test case:
Debugger code (debug.datatables.net):
Error messages shown:
Description of problem: Exploring the selectors (classes or ids) with the web developers tools in Firefox on the finished dataTable HTML, many of the classes and or ids used do not effect the style of the particular element. For example, the tbody, tr have class= "odd". Changing the background-color= red doe snot change the background color of the rows in the finished table. Why? Another example: the Search element is styled with the dataTables_filter; the background color and border can be easily changed using this class.

Ther are many css files listed int he css folder and three other css files in the Database/docs/css folder. Which ones are used to style the dataTables HTML table.

Thanks for your help.