#msg {
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  text-align: center;
  line-height: 20px;
  z-index: 10000;
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  border-radius: 2px;
  padding: 10px 20px;
  font-size: 14px; }