body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: #0b1220;
  color: #e8eefc;
  margin: 0;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 24px;
}

.card {
  background: #111a30;
  border-radius: 16px;
  padding: 24px;
  margin-top: 40px;
}

button {
  background: #3b82f6;
  border: none;
  padding: 14px 18px;
  border-radius: 12px;
  color: white;
  font-size: 16px;
  font-weight: 700;
}