* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f7fa;
  color: #1f2937;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  line-height: 1.5;
}

main {
  max-width: 32rem;
  background: #ffffff;
  padding: 2.5rem;
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
  text-align: center;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #111827;
}

p {
  font-size: 1rem;
  color: #4b5563;
}