:root {
  --bg: #f7f7f5;
  --text: #1c1c1c;
  --muted: #6b6b6b;
  --accent: #2e7d32;
  --border: #e0e0dc;
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 20px 16px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 1.8rem;
}

.last-updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px 64px;
}

.toc {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 24px;
  margin-bottom: 32px;
}

.toc h2 {
  font-size: 1rem;
  margin-top: 0;
}

.toc ul {
  columns: 1;
  padding-left: 20px;
  margin: 0;
}

.toc a {
  color: var(--accent);
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}

section {
  margin-bottom: 32px;
  scroll-margin-top: 16px;
}

section h2 {
  font-size: 1.2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 24px 20px 48px;
}