Custom Styles in Embedded Reports

Custom Styles in Embedded Reports

What is the best way to create custom CSS or other styles to a Zoho Creator Report?  Do I have to create a separate "Page" and build it from scratch?  Certainly not....

All I have found so far is very limited color changes but I need to adjust the font size of various records and even better would like to highlight certain groups or records differently.

I am new to this so maybe this is not too complicated of a question...

Thanks