Hi @ericf I still think should be an folder containing the doc "website" to this repo as well.

One class selector is enough to make the architecture work fine and better in most of the cases.

e.g
.pure-group {}
.pure-group--button {} /* in this case button is a extension of group /
.pure-group-button {} / in this case button is a child of group /
or even better
.pureGroup {}
.pureGroup--button {} / in this case button is a extension of group /
.pureGroup-button {} / in this case button is a child of group */