vcn-validation-style.css

input.error, select.error, textarea.error {
border: 1px red dotted;

}

label.error {
                color: #F00;
                font-family: sans-serif;
                font-size: .8em;
                 -webkit-animation: fadein 2s; /* Safari and Chrome */
       -moz-animation: fadein 2s; /* Firefox */
        -ms-animation: fadein 2s; /* Internet Explorer */
         -o-animation: fadein 2s; /* Opera */
            animation: fadein 2s;
}

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

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

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

/* Internet Explorer */
@-ms-keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}<200b>

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