body {
      font-family: Arial, sans-serif;
      text-align: center;
      padding: 20px;
      height: 90vh;
      background-color: #f4f4f4;
      display: flex;
      justify-content: center;
      align-items: center;
  }
  .container {
      width: 80%;
      background: white;
      padding: 20px;
      border-radius: 10px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.521);
      max-width: 400px;
      margin: auto;
      border: 1px solid ;
  }
  input {
      width: 90%;
      padding: 10px;
      font-size: 16px;
      margin-bottom: 10px;
      border: 1px solid #ccc;
      border-radius: 5px;
  }
  .error {
      color: red;
      font-size: 14px;
      margin-bottom: 10px;
  }
  button {
      background: #007bff;
      color: white;
      border: none;
      padding: 10px;
      cursor: pointer;
      font-size: 16px;
      border-radius: 5px;
  }
  button:disabled {
      background: #ccc;
      cursor: not-allowed;
  }
  button:hover{
      background-color: #0462c7;
  }

  #qrcode {
      margin:2.2rem;
      width: 70%;
      height:15rem ;
      padding: 1rem;
      border:1px solid gray ;
      border-radius: 1rem;
      display: flex;
      justify-content: center;
      box-shadow:inset 0 0 1rem gray;
  }