Sticky mobile call bar

Below 768 px, the bar stays at the bottom of the screen with two large touch targets: a tel: link that dials the number and a directions link that opens the phone's maps app. It works out from the opening hours whether the business is open and, if not, when it reopens ("Closed, opens Monday at 8"), then refreshes every minute. It respects notches with env(safe-area-inset-*), reserves its height at the end of the page so nothing is hidden, and disappears on desktop where the number and address are already visible.

Accessibility: a named "Contact rapide" aside region, native links reachable by keyboard with a 3 px focus outline, 56 px tall targets, AA contrast measured in light and dark, the open status given by text and not by colour alone, and no transitions with prefers-reduced-motion. Without JavaScript both buttons work; only the open status is hidden.