UX: add smooth scroll behaviour

[simonives]

Solution

Add scroll-behavior: smooth; to the html selector in style.css or style-v2.css.

This applies to all in-page anchor navigation (e.g. any #section links). One CSS declaration; no JavaScript required.

Acceptance criteria

• In-page anchor links scroll smoothly rather than jumping
• No regressions on any page
• Behaviour is consistent across Chrome, Firefox, and Safari

Note

Respect prefers-reduced-motion. Wrap in a media query:

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}