Hi again!

I took the liberty to add the keywords from [0].

I moved the justify and align parts out from the flex block and into its
own block.  I also took the liberty to add the `place' variants as well.
These are used a lot when using grid to set up your web page.  I hope
this is usable.  I see that some properties are extracted out into
variables, but not sure what is standard practice here.

Good evening,
Theodor


[0]: https://www.w3.org/TR/css-align-3