If you try it out, you'll see that there are two modes, Preview and Published. Your changes don't go to anyone else until you are done with them, so we won't se

If you try it out, you'll see that there are two modes, Preview and Published. Your changes don't go to anyone else until you are done with them, so we won't serve up half-baked CSS while you're still working on it. Once you're done, you hit Publish and only then is it live.