Responsive typography

The shift Brown argues for: stop designing screens and start designing relationships that hold at any size.

1. When to invoke

• Type sizes must change across viewports or container widths.
• Headings wrap badly, overflow, or shrink below legibility on small screens.
• Building a type system meant to work without per-breakpoint overrides.
• Migrating from fixed breakpoint steps to fluid sizing.

Do not invoke to choose the base size (body-text-and-reading) or the ratio (hierarchy-and-scale). This skill adapts a scale you already have.

2. Required context