Thanks for the response. Just a couple of things.
I went ahead and copied all the template files from Easy Digital Downloads into my Gravit theme folder. First thing is, just copying these files (no editing), the little spinning wheel for the “Add to Cart” button turns into a spinning letter q. And when the green “Added to Cart” text appears, what’s supposed to be a check mark is now a small letter w.
The other thing, the edd.min.css file shows all the code on one line, while the edd.css code is nicely organized over some 460 lines.
Basically all I care to change the style of at this point is the buttons. The plugin is so well designed that it matches my site beautifully. I was just interested in moving some buttons to center alignment, and maybe changing their colors, adding a shadow, etc. The “purchase” text in the button https://glimmero.com/checkout/ looks a little grey when I’d like the text to be white.