/* Both documents opt in; ordinary PHP navigation remains the fallback. */
@media (prefers-reduced-motion: no-preference) and (min-width: 1000px) and (min-height: 600px) {
    @view-transition { navigation: auto; }
    ::view-transition-old(root), ::view-transition-new(root) {
        animation-duration: 160ms;
        animation-timing-function: ease-out;
    }
}
@media (prefers-reduced-motion: reduce) {
    @view-transition { navigation: none; }
}