Foundations

Twenty-three roles in four sets, and every pair measured before it is written.

Two families, two weights, a scale of seven sizes and the display heading.

A four-pixel scale, icon and control sizes, the smallest pointer target.

Containers, breakpoints, corners, lines and the stacking order.

Three durations, two easings, one switch that zeroes them all.

There is none. Structure comes from the line; the veil under a dialog is the one translucency.

Twenty-three stroke drawings, always next to a word, the same shape as a string in the extension.

One attribute on the root, one key in storage, one script before paint, on three surfaces.

What the product says: the four statuses, their symbols, the sentences of the official grid.