.auth-container {
  max-width: 400px;
  margin: 50px auto;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.qr-placeholder {
  width: 200px;
  height: 200px;
  background: #ddd;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  color: #555;
  margin: 10px auto;
  border-radius: 5px;
}