I am trying to update the css for a tab layout I have created. I'm having trouble determining what classes apply to what elements of the tabs. The look needs to be very different from the default styling. I have inspected the DOM but there just seems to be so many different classes being applied.

Can anyone help me with what classes are the most important and/or some documentation as to what I should be overriding? Or are there class properties I can set when I create the tabs in the javascript file? I already have the css classes created. Just need to know how to apply them. Thanks in advance.