Add scalable font size import

[argyleink]

prototype / demo https://codepen.io/argyleink/pen/Yzgbgzm

@layer demo {
  .scaleable {
    h1, h2, h3, h4 {
      font-size: calc(1rem * pow(var(--scale, 1.4), var(--heading-scale)));
    }
    
    h1 { --heading-scale: 4 }
    h2 { --heading-scale: 3 }
    h3 { --heading-scale: 2 }
    h4 { --heading-scale: 1 }
  }
}

[Brian-Pob]

I like the idea. Where would this be added? In Normalize? As a prop-pack?

[argyleink]

yeah, prop pack, as an alternative set to the relative font sizes 👍🏻