Replace the border swap with an outer green outline so the white
border stays in place. Selected = white border + green outline,
unselected = white border only.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- index.css: add visible :focus-visible rings for .site-card-button
and .site-button so keyboard users can see where focus lives
- SiteCard: drop outline:none, add aria-pressed and aria-label so
screen readers announce selection state
- SiteButton: add the .site-button class for the shared focus ring
- SiteDisclaimerScreen: keyboard skip via Enter / Space / Escape, a
role="region" + aria-label wrapper and aria-live="polite" on the
message; honour prefers-reduced-motion on the fade
- IntroVideoPlayer: role="region" with a skip hint in aria-label,
preload="auto", and aria-hidden on the decorative caption span