:root {
  --text: #1c1c1e;
  --muted: #5b5b60;
  --bg: #ffffff;
  --line: #e5e5e7;
  --link: #0a66c2;
  --max-width: 720px;
}

* { box-sizing: border-box; }

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

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header.top {
  margin-bottom: 28px;
}

.brand {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
}

h1 {
  font-size: 28px;
  line-height: 1.25;
  margin: 12px 0 4px;
}

.effective-date {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 32px;
}

h2 {
  font-size: 19px;
  margin: 36px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

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

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

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

strong { font-weight: 600; }

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.nav-links {
  margin-top: 8px;
}

.nav-links a {
  margin-right: 16px;
}

.index-list {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.index-list li {
  margin-bottom: 12px;
}

.index-list a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  color: var(--text);
}

.index-list a:hover {
  background: #fafafa;
}

.index-list .desc {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 14px;
  margin-top: 4px;
}