:root {
  color-scheme: light dark;
  --font-stack: 'Helvetica Neue', Helvetica, Arial, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --bg-light: #f9fafb;
  --bg-dark: #111;
  --text-light: #111;
  --text-dark: #f4f5f7;
  --accent: #005fcc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  line-height: 1.6;
  background: var(--bg-light);
  color: var(--text-light);
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: dark) {
  body {
    background: var(--bg-dark);
    color: var(--text-dark);
  }
}

main {
  max-width: 60ch;
  margin: 4rem auto 5rem;
  padding: 0 1.5rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.2;
  margin: 1.5rem 0 0.5rem;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--accent);
}

a:focus,
a:hover {
  text-decoration: underline;
}

code,
pre {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  background: rgba(0, 0, 0, 0.05);
  padding: 0.1em 0.3em;
  border-radius: 4px;
}

pre {
  padding: 1rem;
  overflow-x: auto;
}

main {
  display: block;
}

main > *:first-child {
  margin-top: 0;
}

@media (max-width: 600px) {
  main {
    margin: 2rem auto 3rem;
    padding: 0 1rem;
  }
}