How to Edit Flora Styles?

How to Edit Flora Styles?

A JQuery novice, I have some JQuery placed on a page --to make tabs --and I need to edit the styles. Dreamweaver tells me the CSS files ("Flora") are in a remote file and can't be edited.

Do I need to get these CSS files on my local machine to edit them? How do I do that? Do these CSS files control both the styling of the tabs and the content within them?

Thanks.