*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-accent: #2563eb;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width: 720px;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  font-size: 16px;
  padding: 0 1rem;
}

header {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 0;
  margin-bottom: 2.5rem;
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
}

header a {
  color: var(--color-accent);
  text-decoration: none;
  font-size: 0.9rem;
}

header a:hover {
  text-decoration: underline;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-bottom: 4rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.effective-date {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-bottom: 2.5rem;
}

h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
  color: #374151;
}

ul {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.4rem;
  color: #374151;
}

footer {
  border-top: 1px solid var(--color-border);
  margin-top: 4rem;
  padding: 2rem 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.85rem;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

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

footer a:hover {
  text-decoration: underline;
}

/* index page */
.page-list {
  list-style: none;
  padding: 0;
  margin-top: 2rem;
}

.page-list li {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 1rem;
}

.page-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: var(--color-text);
}

.page-list a:hover {
  background: #f9fafb;
  border-radius: 8px;
}

.page-list .arrow {
  color: var(--color-muted);
}