:root {
  --bg: #ffffff;
  --text: #1f2328;
  --muted: #6b7280;
  --accent: #e05252;
  --border: #e5e7eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181818;
    --text: #f2f2f2;
    --muted: #8f8f8f;
    --accent: #ff8585;
    --border: #333333;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 5rem;
}
header.site {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.25rem;
}
header.site nav {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  gap: 1.5rem;
  align-items: baseline;
}
header.site .brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}
header.site a { color: var(--accent); text-decoration: none; }
header.site a:hover { text-decoration: underline; }
h1 { font-size: 1.9rem; line-height: 1.25; margin-bottom: 0.25rem; }
h2 { font-size: 1.25rem; margin-top: 2.25rem; border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
h3 { font-size: 1.05rem; margin-top: 1.5rem; }
.effective { color: var(--muted); margin-top: 0; }
a { color: var(--accent); }
ul { padding-left: 1.4rem; }
li { margin: 0.35rem 0; }
footer {
  color: var(--muted);
  font-size: 0.85rem;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}