:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --rule: #e3e3e6;
  --link: #1a7f4b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131315;
    --fg: #e8e8ea;
    --muted: #98989e;
    --rule: #2c2c30;
    --link: #4ec97f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
  max-width: 40rem;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.15rem;
  margin: 2.25rem 0 0.5rem;
  letter-spacing: -0.01em;
}

p, ul { margin: 0 0 1rem; }
ul { padding-left: 1.25rem; }
li { margin-bottom: 0.4rem; }

a { color: var(--link); }
a:hover { text-decoration: none; }

.lede {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

nav {
  margin: 2.5rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}

nav a { margin-right: 1.25rem; }

footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.85rem;
}