:root { color-scheme: light dark; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 0 16px;
}
main { max-width: 40rem; }
code { padding: 0.1em 0.3em; border-radius: 4px; background: rgba(127, 127, 127, 0.15); }