Every control is 0px radius — the entire page carries exactly one rounded value. Buttons are 47px tall at 0 30px with 16px Bold labels at +1px tracking, in an inverse pair, becoming solid white blocks over photography. Disabled is a real designed pair (#b2b2b2 on #e9e9e9), not reduced opacity. Fields explicitly zero out both :focus and :focus-visible — an anti-pattern, so a ring is shown here as the recommended fix.
The radius scale is effectively empty — one value on the entire page — making this the squarest system in the library. Shadows are nearly as sparse, and structure is carried by 1px #e5e5e5 and 2px #000000 borders plus the contrast between white chrome and near-black photography. The dominant transition is unusual: text-decoration 0.1s ease on 124 elements, animating link underlines specifically. Four prefers-reduced-motion blocks ship. There are zero gradients, videos, canvases and backdrop filters.