body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #f6f7fb;
  color: #172033;
}

main {
  max-width: 720px;
  padding: 48px;
  background: white;
  border-radius: 18px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

code {
  background: #eef1f7;
  padding: 2px 6px;
  border-radius: 6px;
}