State reads three ways on every card -- a stripe, a shaped-and-labelled
pill, and the copy -- so it survives a colourblind reader and a glance at
arm's length. Colour alone would fail on the one screen where getting it
wrong costs money.
The expired card leads with what still works, because that is the first
thing a worried customer wants to know and the backend really does keep
servers, monitors and agent keys running. The awaiting-link card is
deliberately loud: a customer who has paid and not linked has paid for
nothing yet.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
