:root {
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --bg: #ffffff;
  --bg-alt: #fafafa;
  --border: #e5e5e5;
  --accent: #111111;
  --link: #0a5cff;
  --max-width: 720px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--accent);
}

.brand img {
  height: 22px;
  width: auto;
  display: block;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 20px;
  font-size: 15px;
}

.nav a:hover,
.nav a.active {
  color: var(--accent);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 80px;
}

main h1 {
  font-size: 32px;
  line-height: 1.2;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

main h2 {
  font-size: 22px;
  margin: 40px 0 12px;
  letter-spacing: -0.005em;
}

main h3 {
  font-size: 17px;
  margin: 24px 0 8px;
}

main p, main ul, main ol {
  margin: 0 0 16px;
}

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

main li {
  margin-bottom: 4px;
}

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

.effective-date {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 32px;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.intro {
  font-size: 18px;
  color: var(--text);
}

.doc-list {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: grid;
  gap: 16px;
}

.doc-list a {
  display: block;
  padding: 20px 24px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  background: var(--bg-alt);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.doc-list a:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.doc-list .title {
  font-weight: 600;
  font-size: 17px;
  margin-bottom: 4px;
}

.doc-list .meta {
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

.site-footer .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
}

.site-footer a:hover { color: var(--accent); }

@media (max-width: 600px) {
  body { font-size: 16px; }
  main h1 { font-size: 26px; }
  main h2 { font-size: 19px; }
  .nav a { margin-left: 14px; font-size: 14px; }
}