:root {
  color-scheme: light dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: #1f2328;
  background: #ffffff;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

h1 {
  font-size: 1.8rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.5rem;
}

p,
li {
  color: #333a42;
}

a {
  color: #0b62c4;
}

nav a {
  margin-right: 1.25rem;
}

footer {
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #6a737d;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #e6edf3;
    background: #0d1117;
  }

  p,
  li {
    color: #c9d1d9;
  }

  a {
    color: #58a6ff;
  }

  footer {
    color: #8b949e;
  }
}