*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f0fdf4;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

header {
  text-align: center;
  margin-bottom: 3rem;
}

header h1 {
  font-size: 3rem;
  color: #16a34a;
}

section {
  margin-bottom: 2rem;
}

section h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: #166534;
}

pre {
  background: #dcfce7;
  border: 1px solid #bbf7d0;
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
}

footer {
  margin-top: 3rem;
  text-align: center;
  color: #6b7280;
  font-size: 0.875rem;
}

footer a {
  color: #16a34a;
}