Space & Radii
Space
A single rhythm for gaps, padding and margins — 3xs (5px) up to 4xl (160px).
Rust: scale::space::{XS3, XS2, XS, S, M, L, XL, XL2, XL3, XL4}.
Radii
scale::radius::{XS3 … XL2}, plus PILL for fully-rounded ends (for a circle
use Val::Percent(50.0)). Each theme also carries structural radii
(radius_selector / radius_field / radius_box) — that's why themes like
synthwave and cyberpunk read as sharp (all 0), while dark and
forest soften (0.5rem / 1rem).