Manage WordPress website CSS on my local machine (mac), via Atom

I’m hoping someone a lot more savvy than I am, can help me out here! The answers may be simple, but I’m just not sure what to do.

I have a Wordpress site and I’m using a plugin that allows me to manage my site CSS.

I would much rather use Atom to edit/update/manage my style.css file for my Wordpress site.

I’m sure there are several ways this can be done, but what would be the cleanest and simplest?

I love using Atom. I’d love to be able to keep it open and go to my .CSS file and make adjustments and have it so that whenever I press SAVE, my changes to live, to my site.

Thanks in advance!