body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: #1f2937;
  background: #f3f4f6;
}

h1 {
  font-weight: 500;
  font-size: 1.5rem;
}