Calculation can be based on fontSize or capHeight

[jesstelford]

Using the default settings, with capHeight set to 32 produces:

{
  "fontSize": "45.010989010989015px",
  "lineHeight": "56px",
  "transform": "translateY(0.28027343749999994em)",
  "paddingTop": "0.05px",
  "marginTop": "-0.5332031249999999em"
}

Then changing to "Font Size" and setting it to 45 produces:

{
  "fontSize": "45px",
  "lineHeight": "55.9921875px",
  "transform": "translateY(0.28033854166666666em)",
  "paddingTop": "0.05px",
  "marginTop": "-0.5333333333333333em"
}

---

Motivation

I have a design I need to match the font size to, so need the calculation to be derived from those pixel sizes as a basis.

[jesstelford]

Closing this for now - the experiment worked, but has some rough edges and quickly fell out of date with the main branch.

See #4 for keeping track of this idea.