The visual system and the voice rules, as the Stak carries them. Every value on this page is one Claude reads.
Type
Two families. The display face is for headlines and the wordmark; everything a person has to read for more than a line is set in the body face.
Display · Bitter
Built to hold up in year sixteen.
Aa 30Aa 21Aa 15
Headlines, pull quotes, and the wordmark. Weight 600, tight leading, never all caps.
Body · Work Sans
Every sentence a customer reads is set here: pages, emails, menus, captions. Sixteen pixels on the web, never lighter than regular, never justified.
RegularMediumSemibold
H1
Display 600 · 40/44 · one per page
H2
Display 600 · 26/32
Body
Body 400 · 16/26 · max 62 characters a line
Caption
Body 500 · 12/16 · uppercase, tracked .08em