:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5a5a5a;
  --accent: #0f8a7a;
  --border: #e5e5e5;
  --card: #f7f7f7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #ececec;
    --muted: #a8a8a8;
    --accent: #3ddcc4;
    --border: #2a2a2a;
    --card: #1c1c1c;
  }
}

* { box-sizing: border-box; }

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

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 20px 96px;
}

header.page-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--fg);
}

.brand .dot {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--accent);
  display: inline-block;
}

.effective-date {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

h1 {
  font-size: 1.9rem;
  margin: 24px 0 8px;
}

h2 {
  font-size: 1.25rem;
  margin-top: 2.2em;
  border-top: 1px solid var(--border);
  padding-top: 1.2em;
}

h3 {
  font-size: 1.05rem;
  margin-top: 1.6em;
}

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

.lead {
  color: var(--muted);
}

ul, ol {
  padding-left: 1.3em;
}

strong { color: var(--fg); }

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

.callout {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  margin: 24px 0;
  font-size: 0.95rem;
}

.crosslink {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--muted);
}

.placeholder {
  background: #ffe9a8;
  color: #6b4e00;
  padding: 1px 5px;
  border-radius: 4px;
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .placeholder {
    background: #4a3c00;
    color: #ffd257;
  }
}

footer.page-footer {
  margin-top: 56px;
  color: var(--muted);
  font-size: 0.85rem;
}