Tokens

Unitless line-height multipliers (resolved to px against each font size). The ladder is a HUMP: it rises to 1.5 at `sm` and then TAPERS to 1.3, because the right amount of leading depends on what a size is used for, not just how big it is. The bottom steps are captions, labels and dense UI chrome — short strings where a tall line box just pads the control — so they run tighter. The middle is prose read over many lines, which wants the most air. The top steps are display copy, where a body ratio reads as a gap between lines rather than leading. A ladder that only climbs (the previous shape here, 1.35 → 1.65) inverts the top half: it made `$xxl` headings 46px tall, double-spaced. This matches the systems the kit draws from, which agree on the shape even though they express it differently. Mantine ships two scales — body `lineHeights` that climb 1.4 → 1.65 across 12–20px, and `headings.sizes` that taper 1.5 → 1.3 across 14–34px; our single 12–28px font scale spans BOTH ranges, so it has to be the union of the two, which is this hump. Tailwind's built-in pairings trace the same curve: 12/16 (1.33), 16/24 (1.5), 18/28 (1.56), 24/32 (1.33), 48/48 (1.0). Against the `font` scale above this resolves to 16 / 20 / 24 / 26 / 28 / 32 / 36 — every value even (so a `(height − lineHeight) / 2` centering gap stays on whole pixels), the first four on a 4px grid, and each one equal to the leading Tailwind or Mantine gives that same font size. Retuning here moves every derived line height at once — `config/fonts.ts`, `createTheme`'s font scales, and `getLineHeight`.