I wrote two pieces regarding Functional CSS http://minid.net/2019/04/07/the-css-utilitarian-methodology/ http://minid.net/2019/04/07/the-css-utilitarian-methodo

I wrote two pieces regarding Functional CSS http://minid.net/2019/04/07/the-css-utilitarian-methodology/ http://minid.net/2019/04/07/the-css-utilitarian-methodology/ and more arguments on its defense http://minid.net/2019/08/12/in-defense-of-functional-css/ http://minid.net/2019/08/12/in-defense-of-functional-css/. You also have a framework on Sass for starting developing websites with this https://github.com/meerita/utilcss https://github.com/meerita/utilcss