:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --ink: #1c1c1e;
  --ink-soft: #55555a;
  --rule: #e6e6e3;
  --accent: #3a6ea5;
  --measure: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121214;
    --surface: #1a1a1d;
    --ink: #ececec;
    --ink-soft: #a6a6ad;
    --rule: #2a2a2e;
    --accent: #7fa8d6;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 3.5rem 1.4rem 5rem;
}

header.site {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem 1.4rem 0;
}

.wordmark {
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.05rem;
}

h1 {
  font-size: 1.9rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem;
}

h2 {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 2.2rem 0 0.5rem;
}

p { margin: 0 0 1rem; color: var(--ink-soft); }

main > p:first-of-type { color: var(--ink); }

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

.updated {
  display: inline-block;
  margin: 0.2rem 0 1.5rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.lede { color: var(--ink); }

hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 2.5rem 0;
}

.back {
  display: inline-block;
  margin-top: 2.5rem;
  font-size: 0.9rem;
  text-decoration: none;
}
.back:hover { text-decoration: underline; }

footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2rem 1.4rem 3rem;
  border-top: 1px solid var(--rule);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

ul { color: var(--ink-soft); padding-left: 1.2rem; }
li { margin: 0.3rem 0; }