:root {
  --text: #1a1a1a;
  --muted: #666;
  --bg: #fff;
  --accent: #2563eb;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  font-size: 16px;
  line-height: 1.8;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

h1 {
  font-size: 28px;
  margin: 0 0 8px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 12px;
}

h2 {
  font-size: 20px;
  margin: 40px 0 12px;
  padding-left: 10px;
  border-left: 4px solid var(--accent);
}

h3 {
  font-size: 16px;
  margin: 24px 0 8px;
  color: var(--muted);
}

p, li {
  font-size: 15px;
}

ul {
  padding-left: 24px;
}

li {
  margin-bottom: 6px;
}

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

a:hover {
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

th, td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}

th {
  background: #f9fafb;
}

.meta {
  color: var(--muted);
  font-size: 13px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.nav {
  margin-bottom: 32px;
  font-size: 14px;
}

.nav a {
  color: var(--muted);
}