UI component typography

Interface text is scanned and acted on, not read continuously. Different failure modes from body copy, and different rules.

1. When to invoke

• Typography inside buttons, labels, inputs, nav, tables, badges, tooltips.
• Numbers misaligning or jittering in tables or dashboards.
• Labels wrapping, truncating, or overflowing.
• Dense product UI where vertical space is contested.

Do not invoke for running prose (body-text-and-reading) or editorial layout (editorial-web-typography).

2. Required context