Spacing

A single 10-step scale (--fuji-space-1 through --fuji-space-16) backs every gap, padding, and margin in Fuji components, including the layout primitives Stack (vertical by default, or horizontal via direction="horizontal") and Grid, whose gap prop maps directly onto it.

Control heights

Interactive controls use three fixed heights: sm 32px, md 40px, lg 48px. The value is consistent across Button, Input, Select, and every other sized control, so mixed-size rows still align on center.