:root { color-scheme: light dark; --fg: #1a1a1a; --muted: #6b7280; }
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  font: 16px/1.5 system-ui, -apple-system, sans-serif; color: var(--fg);
}
main { max-width: 38rem; padding: 2rem; text-align: center; }
h1 { font-size: 2.25rem; margin: 0 0 .5rem; }
.muted { color: var(--muted); font-size: .875rem; }
code { background: rgba(127,127,127,.15); padding: .1em .35em; border-radius: 4px; }