*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; } /* ── Smooth page transitions ─────────────────────────────────────────── Cross-document View Transitions: a quick cross-fade between same-origin navigations instead of the white flash of a hard reload. Chromium-only (Chrome/Edge); other browsers ignore these rules and navigate as before. Gated on no-preference so reduced-motion users keep the instant default. Paired with the