:root { color-scheme: light dark; }
body {
  margin: 0;
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 2.25rem 0 0.5rem; }
p, ul { margin: 0 0 0.75rem; }
ul { padding-left: 1.25rem; }