Typography

Typography serves reading and information hierarchy first. Yue's typography tokens do not require consumers to install a specific font, but the package ships local font assets as the default visual baseline and does not depend on an external CDN.

Font roles

Role	Token	Usage
UI font	--font-ui	Interface text, forms, and components
Monospace font	--font-mono	Code, token names, and logs
Numeric font	--font-number	Statistics and data that need stable digit widths

Type scale and line height

The current type scale runs from --font-size-sm to --font-size-display, and line height runs from --line-height-sm to --line-height-display. Components should prefer their own component token mappings of the type scale; only page titles use the base type scale directly.

• Body text uses at least 14px and normal line height; dense controls may use 12px, but cannot carry long-form explanations.
• Font weight is used to establish hierarchy; do not over-emphasize with color and bold at the same time.
• Letter spacing stays at 0 by default; only display titles or all-caps short labels should consider extra letter spacing.
• When font loading fails, it must fall back to system fonts; a failed font asset must not make the layout unusable.