:root{--colour-ink:#111;--colour-paper:#fff;--colour-muted:#555;--font-body:system-ui, -apple-system, "Segoe UI", sans-serif;--space-2:.5rem;--space-4:1rem;--space-8:2rem;--measure:40rem}*,:before,:after{box-sizing:border-box}body{color:var(--colour-ink);background:var(--colour-paper);font-family:var(--font-body);margin:0;line-height:1.5}