A materials lab hero over the reaction-diffusion background component: a live Gray-Scott simulation in WebGL grows coral and fingerprint patterns across the page in the theme's paper, ink and primary colors, steering around the headline, intro and buttons while a slow drifting eraser keeps it evolving. The cursor or a tap seeds new colonies and it also seeds itself. Every growth setting passes through the growth prop; a primary Arrow Pill and an underline link sit under the copy. Pauses offscreen, grows one settled still frame for reduced motion and falls back to a CSS pattern without WebGL.