:root {
  color-scheme: light dark;
}
body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  line-height: 1.6;
  background: #fafafa;
  color: #1b2430;
}
main {
  max-width: 36rem;
  margin: 18vh auto;
  padding: 0 1.5rem;
}
h1 {
  font-size: 1.75rem;
  margin: 0 0 1rem;
}
a {
  color: #0e5a7a;
}
@media (prefers-color-scheme: dark) {
  body {
    background: #111827;
    color: #e5e7eb;
  }
  a {
    color: #93c5fd;
  }
}