Issue modifying colors on hover for buttons

Hi,

I am using corbu theme, can somebody please help me with following issues:

1. Unable to change colors of buttons on hover or mouse move on the button

2. Unable to change the font style like changing to lucida font or any fonts for button text, tabs or texts of table

3. Unable to change the colors of the table like header section

4. Unable to change the font style of the dynamic header, also unable to change from italics to normal or bold

Thanks

Sushma