[nawgz]

I still don't think you can make a block or an assignment using CSS vars, i.e. the left hand side of a `property: value;` statement. Maybe I'm wrong, that would be interesting

[royal_ts]

yes you can, it's known as css custom properties

[easrng]

I think they're trying to say that you can't

  :root {
    --prop: color;
    --value: red;
    var(--prop): var(--value)
  }