* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #1e293b;
  background: #f8fafc;
  line-height: 1.7;
}
.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}
.nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 14px;
  margin-bottom: 40px;
}
.nav .brand { font-weight: 700; color: #1e293b; margin-right: auto; }
h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 4px;
}
.updated {
  color: #94a3b8;
  font-size: 14px;
  margin-bottom: 36px;
}
.lead {
  font-size: 17px;
  color: #475569;
  margin-bottom: 32px;
}
.section {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}
h2 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}
p, ul, ol {
  font-size: 15px;
  color: #475569;
}
ul, ol {
  padding-left: 20px;
  margin-top: 8px;
}
li { margin-bottom: 4px; }
a { color: #6366f1; text-decoration: none; }
a:hover { text-decoration: underline; }
.footer {
  text-align: center;
  margin-top: 48px;
  color: #94a3b8;
  font-size: 13px;
}

@media (prefers-color-scheme: dark) {
  body { color: #e2e8f0; background: #0f172a; }
  .nav .brand { color: #e2e8f0; }
  .section { background: #1e293b; border-color: #334155; }
  p, ul, ol, .lead { color: #cbd5e1; }
  a { color: #a5b4fc; }
}