How do I modify class attributes for the Fundraiser plugin via custom CSS?

Hi,

I've been trying to create a custom "Theme" for the Fundraising plugin using the Custom CSS function. I have been able to modify id attributes with "#idnamehere", but I have been unable to modify the class attribute using ".classnamehere". Is there something special I need to do with the class reference to get the changes to appear?

Thanks

I have been