Nice work! I like that you have included support for prefers-color-scheme, which is one of the more highly-requested features for these kinds of frameworks.
I've added Lissom to the big list of minimal CSS frameworks [0] which aims to collect all of these types of projects (more or less) in one place for ease of discoverability and comparison. You can preview the CSS on some HTML5 boilerplate here [1].
Thank you for adding Lissom.CSS to the list. Indeed, I think that all modern websites should account for `prefers-color-scheme`, now that it has been supported by virtually every browser for several years.
I've added Lissom to the big list of minimal CSS frameworks [0] which aims to collect all of these types of projects (more or less) in one place for ease of discoverability and comparison. You can preview the CSS on some HTML5 boilerplate here [1].
[0]: https://github.com/dohliam/dropin-minimal-css
[1]: https://dohliam.github.io/dropin-minimal-css/?lissom