);
}
// Shared-layout spring — the active decoration slides between items on nav change.
const activeSpring = { type: 'spring' as const, stiffness: 420, damping: 34 };
/**
* The active-item decoration — a single clean recessed dark fill (no stroke, no
* border, no color). The shared `layoutId` makes it glide from the
* previously-active item to the new one.
*/
function ActiveDecoration() {
return (