:root {
  --bg: #ffffff;
  --fg: #16181d;
  --muted: #5c6270;
  --line: #e3e6ec;
  --accent: #2f6df6;
  --card: #f7f8fa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101216;
    --fg: #e8eaef;
    --muted: #9aa1b0;
    --line: #262a33;
    --accent: #7aa2ff;
    --card: #171a20;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 0 1.25rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap {
  max-width: 44rem;
  margin: 0 auto;
  padding: 3.5rem 0 4rem;
}

header.site {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

header.site .mark {
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--fg);
}

header.site .tag {
  color: var(--muted);
  font-size: 0.95rem;
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 0.75rem;
}

h3 {
  font-size: 1rem;
  margin: 1.75rem 0 0.5rem;
}

p, li { color: var(--fg); }

.lead {
  font-size: 1.1rem;
  color: var(--muted);
  margin: 0 0 2rem;
}

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

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  margin: 1rem 0;
}

.card p:last-child { margin-bottom: 0; }
.card p:first-child { margin-top: 0; }

dl.meta { margin: 0; }
dl.meta dt { color: var(--muted); font-size: 0.85rem; margin-top: 0.75rem; }
dl.meta dt:first-child { margin-top: 0; }
dl.meta dd { margin: 0.1rem 0 0; }

footer.site {
  margin-top: 4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

footer.site a { color: var(--muted); }

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

@media (max-width: 480px) {
  .wrap { padding-top: 2.5rem; }
  h1 { font-size: 1.6rem; }
}