This is nice, but you'll see some alphabets or words would get wrapped into new lines when the element(.demo-type) is resized. It's a minor but subtle effect.

You might want to revisit how the font-size (and line-height) do not always remain in perfect sync to the element-width. What we've here is the ratio of font-size over width-of-the-element. Since font-size doesn't depict width of the font accurately, a percentage change in it doesn't reflect proportionally to revised width of the element(.demo-type). Hope this helps.

We call this resolution stationary rendering internally and use it in our product: https://bubbleideas.com/letters/the-tiger-by-sir-william-bla...