body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f7f8fa;
  color: #1f2937;
}
.container {
  max-width: 720px;
  margin: 72px auto;
  padding: 0 20px;
}
h1 {
  margin: 0 0 12px;
  font-size: 30px;
}
p {
  margin: 0;
  color: #4b5563;
}