@keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Firefox < 16 */
@-moz-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}



@keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}

/* Firefox < 16 */
@-moz-keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}

/* Internet Explorer */
@-ms-keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}

/* Opera < 12.1 */
@-o-keyframes fadeout {
    from { opacity: 1; }
    to   { opacity: 0; }
}

#success-message {
    margin-top: 1rem;
}

#success-message.fadein {
    -webkit-animation: fadein 2s; /* Safari, Chrome and Opera > 12.1 */
       -moz-animation: fadein 2s; /* Firefox < 16 */
        -ms-animation: fadein 2s; /* Internet Explorer */
         -o-animation: fadein 2s; /* Opera < 12.1 */
            animation: fadein 2s;
            animation-fill-mode: forwards;
            opacity: 0;
}


#success-message.fadeout {
    -webkit-animation: fadeout 2s; /* Safari, Chrome and Opera > 12.1 */
       -moz-animation: fadeout 2s; /* Firefox < 16 */
        -ms-animation: fadeout 2s; /* Internet Explorer */
         -o-animation: fadeout 2s; /* Opera < 12.1 */
            animation: fadeout 2s;
            animation-fill-mode: forwards;
            opacity: 1;
}