button { 
    font-size: 1.1em;
    background-color: #EBF5FF;
    color: #4312AE;
    border: 2px solid black;
    box-shadow: 4px 4px 4px #999999;
  }
  button:hover, button:focus, button:active { 
    /* swap colors */
    color: #EBF5FF;
    background-color: #4312AE;
    cursor: pointer; /* displays a hand */
  }