Foundations

Typography

LIM uses system typography — not a downloaded brand font package.

A deliberate choice

Layered Interface Method does not require installing special typefaces. The interface inherits a stack that prefers SF Pro Display when the operating system provides it, then falls back through Helvetica Neue → Helvetica → Arial → sans-serif.

No unofficial CDN hosts SF Pro. No pirated font files ship with the site. On macOS and iOS the text feels native; on Windows and Linux the fallbacks remain calm and readable.

Sans stack

The primary interface family is defined once and reused everywhere via --lim-font-sans.

--lim-font-sans:
  "SF Pro Display",
  "SF Pro Icons",
  "Helvetica Neue",
  Helvetica,
  Arial,
  sans-serif;

Optical roles

Hero

700 · tracking −0.045em · line-height 0.92

Section

700 · tracking −0.03em · calm leading

Card title

600 · secondary to display

Body

400 · line-height 1.6

Code

Monospace stays on --lim-font-mono for code, keys, and technical labels. It never inherits the display sans stack.