Three faces.
Three jobs.
One brand.

Geist Sans 700 for hero headlines · Geist Sans 500 for body · Geist Mono 700 for stamps/labels

Geist Sans 500–600 everywhere · Geist Mono for token values + timestamps

Geist Sans 500–700 · system fallback to -apple-system / Roboto · Geist Mono for code/values

Courier Prime 12pt locked · Geist Sans for editor chrome only

Geist Sans web-safe stack · Geist Mono for receipts/codes · Geist Sans 700 for branded launch emails

Geist Sans 700 for cover headlines · Geist Sans 400–500 for slide body · Geist Mono 700 for slide numbers

• Use Geist Sans 900 for every wordmark instance.
• Use Geist Sans 700 for every heading on every surface.
• Use Geist Mono for all timestamps, codes, version stamps, and metadata.
• Lock Courier Prime to .arq screenplay rendering — never UI, never marketing.
• Anchor all sizes to a 4px grid: 12 · 14 · 16 · 18 · 24 · 36 · 48 · 64 · 96.

• Don't introduce a fourth typeface — even temporarily, even for a campaign.
• Don't use Inter, Söhne, Fraunces, JetBrains Mono, or any retired face in new work.
• Don't use a serif anywhere — Fraunces is retired, Geist Sans 700 owns headings.
• Don't mix Geist Sans and Geist Mono in the same line; switch contexts cleanly.
• Don't set Courier Prime outside the editor — it reads as "screenplay", not "arqo".