:root {
  --bg: #ffffff;
  --fg: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --link: #1d4ed8;
  --max-width: 680px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 20px 80px;
}

header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

header .brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  text-decoration: none;
}

header nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
}

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

h1 {
  font-size: 28px;
  line-height: 1.25;
  margin: 0 0 8px;
}

h2 {
  font-size: 18px;
  line-height: 1.3;
  margin: 32px 0 8px;
}

p, ul, ol { margin: 12px 0; }

ul, ol { padding-left: 22px; }

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

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: #f3f4f6;
  padding: 1px 6px;
  border-radius: 4px;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.effective-date {
  color: var(--muted);
  font-size: 14px;
  margin-top: 4px;
}

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

footer a {
  color: var(--muted);
  margin-right: 12px;
}