:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #172b4d;
  --muted: #5e6c84;
  --border: #dfe1e6;
  --link: #0052cc;
  --accent: #0747a6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

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

a:hover {
  text-decoration: underline;
}

.topnav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 700;
  color: var(--accent);
}

.topnav nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem 1.75rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
}

h2 {
  margin: 1.75rem 0 0.6rem;
  font-size: 1.2rem;
}

h3 {
  margin: 1.25rem 0 0.4rem;
  font-size: 1.05rem;
}

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

.muted,
.meta {
  color: var(--muted);
  font-size: 0.95rem;
}

ul {
  padding-left: 1.25rem;
}

.hero-links {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.hero-links a.card-link {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.1rem 1.25rem;
  color: inherit;
  text-decoration: none;
}

.hero-links a.card-link:hover {
  border-color: var(--link);
}

.hero-links strong {
  display: block;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

footer {
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f4f5f7;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  background: #f4f5f7;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}