More than two typefaces
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Rule · bucket: judgment · severity: note · detector: none · since: v0.1.0
Section: Things to avoid
Group: Typography

Forbidden:
  A serif for headings, a script for the description, a sans for the UI

Instead:
  One sans serif for everything is the safe default: most legible at small sizes, neutral enough to suit any brand, and it keeps the content rather than the lettering as the focus.

A **second** typeface is permitted for headings only, where the brand needs a mood the sans cannot carry. Never a third. Never a script or display face below heading size — they are drawn for large sizes and become unreadable small.