The three families
Schibsted Grotesk, in weights 700 and 800, appears in headings, large numbers, and the wordmark, always with negative tracking around −0.04em. Hanken Grotesk carries almost every word in the product: body copy, labels, buttons, forms, and error messages. IBM Plex Mono marks everything that is machine. When the artificial intelligence speaks, writes, or signs, it is in mono, and it identifies itself. Metadata, protocols, timestamps, and labels follow the same family. This is about transparency: no one should have to guess whether they talked to a person.
The fourth letter. Caveat exists for the handwritten notes over the site’s screens, as if someone had scribbled in pencil over the printout. One weight, one use, and never as reading typography.