.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    z-index: 1000; 
  }
  
  .popup-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    text-align: center;
  }
  
  button {
    padding: 10px 20px;
    margin: 5px;
    font-size: 16px;
    cursor: pointer;
  }
  
  button#bookAppointment {
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
  }
  
  button#byCallBtn {
    background-color: #28a745;
    color: #fff;
    border: none;
    border-radius: 5px;
  }
  
  button#byOnlineBtn {
    background-color: #dc3545;
    color: #fff;
    border: none;
    border-radius: 5px;
  }