:root {
  --bg: #fdfdfc;
  --fg: #1c1c1a;
  --muted: #6b6b66;
  --rule: #e4e3dd;
  --link: #1c1c1a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --fg: #e8e6e1;
    --muted: #9a978f;
    --rule: #2c2c31;
    --link: #e8e6e1;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 0 24px;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

header {
  max-width: 40rem;
  margin: 0 auto;
  padding: 32px 0 20px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--rule);
}

.brand {
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
}

nav { display: flex; gap: 18px; }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

nav a:hover { color: var(--fg); }

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 40px 0 64px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

h2 {
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
}

p { margin: 0 0 16px; }

.lede { color: var(--muted); margin-bottom: 36px; }

.meta {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 10px;
}

a { color: var(--link); text-decoration: underline; text-decoration-color: var(--rule); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--muted); }

ul.index { list-style: none; margin: 0; padding: 0; }

ul.index li {
  padding: 14px 0;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}

ul.index li:last-child { border-bottom: 1px solid var(--rule); }

ul.index a { text-decoration: none; }
ul.index a:hover { text-decoration: underline; }

ul.index .meta { margin: 0; flex: 0 0 auto; }

article { margin: 0 0 44px; }

article:last-child { margin-bottom: 0; }

footer {
  max-width: 40rem;
  margin: 0 auto;
  padding: 24px 0 48px;
  border-top: 1px solid var(--rule);
}

footer p { color: var(--muted); font-size: 14px; margin: 12px 0 0; }
footer a { color: var(--muted); }

@media (max-width: 480px) {
  body { font-size: 16px; padding: 0 18px; }
  header { flex-direction: column; gap: 8px; padding-top: 24px; }
  ul.index li { flex-direction: column; gap: 4px; }
}