.toast{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 200px;
    height: 60px;
    color: #fff;
    font-size: 16px;
    line-height: 60px;
    text-align: center;
    background-color: rgba(0,0,0,0.8); 
 }