body {
  margin: 0;
  font-family: Segoe UI, Arial, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 48px 24px;
}

h1 {
  color: #f8fafc;
  font-size: 2.4rem;
}

h2 {
  color: #cbd5e1;
  margin-top: 32px;
}

p, li {
  line-height: 1.6;
}

pre {
  overflow-x: auto;
  background: #111827;
  border: 1px solid #374151;
  padding: 16px;
  border-radius: 10px;
}