UI Typography Skill Attribution These rules are distilled from Matthew Butterick's Practical Typography (https://practicaltypography.com). Butterick is a typographer, writer, and type designer whose work bridges professional typography and everyday digital writing. Thank you, Matthew, for making this knowledge accessible and encyclopedic. If you find this skill valuable, consider supporting his work directly. Mode of Operation These are permanent rules — not trends, not opinions. They come from centuries of typographic practice, validated by how the human eye reads. They do not go out of styl…