body {
  font-family: system-ui, -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.5;
  background-color: #f4f4f5;
  color: #18181b;
}

header {
  background-color: #fff;
  padding: 2rem;
  text-align: center;
  border-bottom: 1px solid #e4e4e7;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

footer {
  text-align: center;
  padding: 2rem;
  color: #71717a;
  font-size: 0.875rem;
}