The CSS data type represents a distance value. Lengths can be used in numerous CSS properties, such as width, height, margin, padding, border-width, font-size, and text-shadow.
- https://developer.mozilla.org/en-US/docs/Web/CSS/length
- The large, small, and dynamic viewport units https://web.dev/viewport-units/ (web.dev)
- Future CSS: Anchor Positioning (kizu.dev)