:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5b5b5b;
  --accent: #1558d6;
  --card: #f6f7f9;
  --border: #e6e6e6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151a;
    --fg: #e8e8ea;
    --muted: #a2a4ab;
    --accent: #7aa2f7;
    --card: #1c1e26;
    --border: #2a2d38;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  margin: 0;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.2rem 4rem;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header.site {
  border-bottom: 1px solid var(--border);
}
header.site .wrap {
  padding-top: 1.4rem;
  padding-bottom: 1.4rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
header.site .brand { font-weight: 650; font-size: 1.05rem; }
header.site nav a { margin-left: 1.1rem; color: var(--muted); font-size: .95rem; }

h1 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 .6rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
p.lead { font-size: 1.1rem; color: var(--muted); }
ul { padding-left: 1.2rem; }
li { margin: .3rem 0; }
code {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 0 .35em;
  border-radius: 4px;
  font-size: .9em;
}
.note {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .9rem 1.1rem;
  margin: 1.4rem 0;
  font-size: .95rem;
}
.muted { color: var(--muted); }
footer.site {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .9rem;
}
footer.site .wrap { padding-top: 1.4rem; padding-bottom: 2.5rem; }
.updated { color: var(--muted); font-size: .9rem; margin-top: -.3rem; }