MERCURYOS

Hold the primary action to charge it. The metal deforms under the pointer and the specular band slides across the bevel.

state idle

Drag or use the arrow keys. The knob is damped with a spring, so it overshoots, settles, and sheds a droplet if you flick it.

A gooey filter merges the knob into the track as it fills. Switching on makes the metal pour.

The chrome indicator flows between options with a springy overshoot. Arrow keys work once focused.

material Solid

The five stops every surface is built from, in order of pressure.

Tab through the pills. The focus ring is chrome — a dark gap then an ice glint, never a default outline.