I decided to hand optimise the default CSS that came with the CS 2.1 package, both for the mental exercise as well as to derive a less verbose set for me
to customise any future CS projects from.
The totaled file size is reduced from 179 KB to 140 KB, not too impressive but I’m sharing it anyway in the hopes someone might find it useful.
Note that there should be no changes at all, visually.
Update: Ran the files through CSSTidy, down to 103 KB.