ferrofluid button

A WebGL call-to-action button on a light warm-grey page. At rest, a deep black pool stands in a capsule like a drop of ferrofluid, with crisp studio reflections along its rim, a soft shadow under it and a slow swell moving across its surface, and Get access floats on the liquid. Hover it and the liquid rises in a soft bulge under the pointer; moving leaves a wake of expanding, fading rings, like a finger drawn across water, and the label bends and refracts through them. Click and the surface surges at the click point and drops, sending three waves across the button: Get access dissolves under them and You're in surfaces, then the label comes back after about four seconds. It plays an 8-second scripted demo with its own pointer, and hands over to your real mouse the moment you move it. The whole page is one fragment shader that ray-marches the liquid's height field and reflects a procedural studio off it; both labels are one canvas texture, refracted by the surface's normal. The button is a real, keyboard-focusable button you can wire to any action. Change the labels, the size of the pill, the studio lights or how the ripples travel in a few lines. Every demo frame is a pure function of time, with window.__render(t) and a ?rec mode for frame-exact video export; reduced motion shows one still until you take over. The font is local, so it runs offline.