body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 2rem;
  background: #f8fafc;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
  background: #fff;
  border-radius: 16px;
  padding: 40px 32px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

h1 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

a.button {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  margin: 0.5rem;
  border-radius: 999px;
  border: 1px solid #cbd5f5;
  text-decoration: none;
  color: #333;
  font-weight: 600;
}

a.button.primary {
  background: #4f46e5;
  color: #fff;
  border-color: #4f46e5;
}

.helper-text {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: #666;
}

@media (max-width: 640px) {
  body {
    margin: 1rem;
  }

  .container {
    padding: 28px 20px;
  }
}