:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --text: #1f2328;
  --muted: #646b73;
  --link: #1a5fb4;
  --rule: #e3e5e8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --text: #e8eaed;
    --muted: #9aa0a6;
    --link: #8ab4f8;
    --rule: #36383c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
}

main,
footer {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 16px;
}

main {
  padding-top: 56px;
  padding-bottom: 32px;
}

h1 {
  font-size: 34px;
  line-height: 1.2;
  margin: 0 0 8px;
}

h2 {
  font-size: 20px;
  margin: 36px 0 8px;
}

p,
ul {
  margin: 0 0 14px;
}

li {
  margin-bottom: 6px;
}

.lead {
  font-size: 19px;
}

.muted,
.crumb {
  color: var(--muted);
}

.crumb {
  margin-bottom: 20px;
  font-size: 15px;
}

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

footer {
  padding-top: 16px;
  padding-bottom: 48px;
  border-top: 1px solid var(--rule);
  font-size: 15px;
}