body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #0b0f14;
  color: #e6edf3;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.card {
  background: #111827;
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid #374151;
  max-width: 600px;
  text-align: center;
}
button {
  background: #2563eb;
  color: white;
  padding: 0.6rem 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.status {
  margin-top: 1rem;
  color: #9ca3af;
}