this is the directory of my free css & html codes for use customizing the appearance of fanworks hosted on the archive of our own. i choose to host them here privately because most of them lend themselves better to mixing and matching than being one single unified work skin. also there aren't that many public work skins and i really don't want to be the first one for some reason???
to learn how to use these, here is an awesome tutorial series by AO3 users CodenameCarrot and La_Temperanza to get you started.