body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
}
.btn-primary {
  background: #7c3aed;
  color: white;
}
.btn-primary:hover {
  background: #6d28d9;
}
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}