#snackbar {
    visibility: hidden; 
    min-width: 250px; 
    margin-left: -125px; 
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 2px;
    padding: 16px;
    position: fixed;
    z-index: 1;
    left: 50%;
    bottom: 20%;
}

    #snackbar.show {
        visibility: visible; 
        -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
        animation: fadein 0.5s, fadeout 0.5s 2.5s;
    }

@-webkit-keyframes fadein {
    from {
        bottom: 0;
        opacity: 0;
    }

    to {
        bottom: 20%;
        opacity: 1;
    }
}

@keyframes fadein {
    from {
        bottom: 0;
        opacity: 0;
    }

    to {
        bottom: 20%;
        opacity: 1;
    }
}

@-webkit-keyframes fadeout {
    from {
        bottom: 20%;
        opacity: 1;
    }

    to {
        bottom: 0;
        opacity: 0;
    }
}

@keyframes fadeout {
    from {
        bottom: 20%;
        opacity: 1;
    }

    to {
        bottom: 0;
        opacity: 0;
    }
}