Have every property have initial, inherit, unset, and revert as they are CSS wide properties.
https://developer.mozilla.org/en-US/docs/Web/CSS/initial
https://developer.mozilla.org/en-US/docs/Web/CSS/inherit
https://developer.mozilla.org/en-US/docs/Web/CSS/unset
https://developer.mozilla.org/en-US/docs/Web/CSS/revert