.callbutton {
    background-color: #bd3535; /* Blue */
    border: none;
    color: white;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 4px;
  }
  .callbutton:hover {
    background-color: #0056B3; /* Darker Blue */
  }