Dynalist is a notetaking app, that let's you have infinite amount of lists.
I wrote two extensions for it. Check out the video explaining it in more details
Stylish Extension CSS violated chrome Web Store Policy so I needed to store my stylish-theme backup
Original theme is found here https://userstyles.org/styles/144225/dynalist-simple-colors-for-default-theme
Dynalist Pro supports CSS within the document itself