@cube-drone/marquee-css

The Marquee reference stylesheet: the mq-* class contract every renderer targets — effects under prefers-reduced-motion (the exit is contractual), the layout grids, the schemes, the size dial, placeholders and affordances.

Two ways in:

import "@cube-drone/marquee-css/marquee.css";      // bundlers: the file itself
import { marqueeCss } from "@cube-drone/marquee-css"; // node: the string, to inline or write

Without this stylesheet a rendered document is still readable semantic HTML (and <font color> still colors — the floor of the degradation ladder is the browser itself); with it, the marquee scrolls. Part of the Marquee markup language.