I am trying to modify the style for modules in a Joomla Art Template.  I have created a folder in modules/mod_k2_content/tmpl called monthlyfocus and copied the k2.css file into this directory.  When I open the module I see the monthly focus in the dropdown of sub-template types.  I choose it but can not see where my changes are occurring.  I have changed the background color on the even and odd for the "Zebra Rows" as well as modified some font sizes.  Can anyone provide any help?

The k2.css should not be pasted in modules/mod_k2_content/tmpl/monthlyfocus, but rather in templates/your template/css/.

It contains all k2 styling and not only for the modules.

Thanks for the help

Wouldn't modifying the CSS in this manner affect all modules and thus defeat the purpose of having a separate template?

Try to give a different class suffix to control the different templating.