pub fn h0() -> LengthExpand description
Responsive counterparts of the px constants: each returns a Length
that scales with the surface’s smaller dimension (vmin) and is clamped
to a sensible px range, so the same level reads correctly from a portrait
phone to a 4K desktop. Same hierarchy as the constants — h0 the largest
display heading down to body_xs the smallest caption. Largest display
heading: scales as 5% of vmin, clamped to 32..=80 px.