Replace the website with the instrument

The previous pass was a cleaner version of the same landing-page
template: centered hero, badge, screenshot, stat strip, card grid.
This one removes the website patterns entirely.

The hero is a running instance of the product — a 14-second
deterministic simulation in which an action waits for its window,
executes, settles into a fresh note, the score ticks from 62.4 to
79.6, and the observer column records an executor hop or nothing at
all. Elapsed time drives pure functions, so it pauses off-screen,
survives tab switches, and renders a fixed frame under reduced motion.

Sections become numbered instrument panels: the engine as one bordered
panel with five aligned rows, the attacker view as a single split
ledger whose observer column is mostly em-dashes, disclosure as mono
receipts. A dark mono protocol ticker separates hero from body. Type
scale doubles, second phrases drop to gray, film grain and an aurora
glow replace flat white, and primary buttons go ink-black.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>