:root {
  --text-color: #1a1a1a;
  --muted-color: #5f6368;
  --border-color: #e5e7eb;
  --accent-color: #2563eb;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background-color: #ffffff;
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

header.site-header {
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
  padding-bottom: 24px;
}

header.site-header a.brand {
  text-decoration: none;
  color: var(--text-color);
  font-size: 1.1rem;
  font-weight: 600;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 8px;
}

h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 32px;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 4px;
}

ul {
  margin: 12px 0;
  padding-left: 24px;
}

li {
  margin: 4px 0;
}

p {
  color: var(--text-color);
  font-size: 1rem;
  margin: 16px 0;
}

.updated {
  color: var(--muted-color);
  font-size: 0.875rem;
  margin-top: 0;
  margin-bottom: 32px;
}

.notice-box {
  background-color: #f8f9fa;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px 24px;
  margin: 24px 0;
}

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

a:hover {
  text-decoration: underline;
}

nav.links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 32px;
}

nav.links a {
  display: block;
  padding: 14px 18px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-color);
  font-weight: 500;
}

nav.links a:hover {
  border-color: var(--accent-color);
  text-decoration: none;
  background-color: #f8f9fa;
}

footer.site-footer {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  color: var(--muted-color);
  font-size: 0.85rem;
}

.back-link {
  display: inline-block;
  margin-top: 40px;
  font-size: 0.95rem;
}