Free Jekyll themes with live demo and docs. Curated based on content-first design, personal or magazine-like, uniqueness, responsive or mobile AMP, etc.
There is no clever design philosophy to talk about, I tried to find something to work with, and βscribbleβ came to my mind. This theme uses Open Sans powered by Google Web Fonts, and was written in plain HTML, SCSS & CoffeeScript, though .scss & .coffee files wouldnβt be included in the theme.