<ul> lists and will collapse back to readable lists in the absence of css support, making it accessible to all readers. It is open source and easily configurable according to project needs.
The non-chart elements on the html version of this page were styled with mvp.css. MVP.css was one of the inspirations for C💚SS.css. Although C💚SS.css turned out very differently, MVP.css got me on to the idea of having a simple, self-contained .css file that could easily transform a text page into something nice.