body{margin:0;font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif;background:#f6f7f9;color:#1d2330}
main{max-width:560px;margin:18vh auto;padding:0 20px}
h1{font-size:28px;margin:0 0 12px}
.muted{color:#6b7280}