Configuring scroll-behavior to respect prefers-reduced-motion

Goal

Ensure that smooth scrolling initiated via the CSS scroll-behavior property automatically respects a user’s prefers-reduced-motion: reduce setting without requiring JavaScript overrides.

Constraints

The CSS Scroll Behavior specification does not define how scroll-behavior should interact with media features, leading to inconsistent browser implementations where smooth animation runs regardless of motion‑reduction preferences.

• Should scroll-behavior honor prefers-reduced-motion: reduce by default?
• If not, what CSS‑only mechanism can developers use to suppress smooth scrolling when the media query matches?
• How can the behavior be reliably tested across Chrome, Firefox, and Safari without resorting to script‑based scrolling?