#wrap {
    display: flex;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    justify-content: center;
    align-items: center;
    background: #eee;
  }

  #wrap #message {
    color: #333;
    padding: 2em;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-shadow: 0px 0px 3px #aaa;
    font-family: arial;
    background: white;
    text-align: center;
  }