How the salt moves.

Bonneville treats the web page as one measured mile. The visitor never leaves the course or turns a corner. Seven full-width stations travel laterally past a fixed horizon, while the browser’s familiar vertical wheel input becomes forward motion. The design borrows the severe legibility of timing slips, the enormous type painted on a record car, and the bleaching effect of noon on salt.

The fictional Meridian M-17 program gives the instrument a human pulse. Ada Rusk’s white-glove release, Len Varo’s two-stage parachute ritual and Mireya Sol’s dawn salt reading frame speed as teamwork and patience. Even at 843 km/h, the real subject is measurement: one line, one direction, one clock.

In main.js, resize() measures the wide .track, calculates its maximum travel and gives .scroll-shell enough vertical height to cover it. updateTarget() converts page scroll into a zero-to-one value. The animation loop eases toward that target and writes --travel-x, allowing the GPU-friendly translate3d() in styles.css to move the entire ribbon.

The mile-marker buttons call goToStop(), which reverses the midpoint-calibration exponent before mapping a station back to vertical scroll. Arrow and Page keys use the same path. At rest, the frame loop sleeps; it also cancels when the document is hidden. Under reduced motion, the sticky system opens into a conventional vertical reading order.

drawWorld() paints the cyanotype sky, white crust, horizon and converging course lines on #salt-world. makeCracks() uses a seeded linear-congruential generator, so its branching salt fractures look irregular but remain stable between frames. Device-pixel ratio is capped at 1.5 for a crisp result without wasting fill rate.

Above 500 km/h, updateInterface() exposes --heat and --mirage-opacity. Eight clipped copies inside .mirage-bank shear independently while drawWorld() bends salt bands on canvas. Crossing 842 toggles .trap-active: a photo-cell ruler, one-shot scan and chronograph certificate expose the record. calibrateRecord() then lets a fine pointer pull the numeral’s chromatic slices without adding another frame loop.