body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f7fb;
  color: #1b2430;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
}

section {
  background: #fff;
  border: 1px solid #dfe5ee;
  border-radius: 8px;
  padding: 12px 16px;
  margin-top: 16px;
}

h1,
h2 {
  margin: 0 0 8px;
}

pre {
  white-space: pre-wrap;
  margin: 0;
}