.hidden {
    opacity: 0;
    -webkit-transform: scale(0.8); /* Safari and Chrome */
    -moz-transform: scale(0.8); /* Firefox */
    -ms-transform: scale(0.8); /* IE 9 */
    -o-transform: scale(0.8); /* Opera */
    transform: scale(0.8);
}

.show {
    -webkit-animation: fadeInScaleUp 0.6s ease-out forwards; /* Safari and Chrome */
    -moz-animation: fadeInScaleUp 0.6s ease-out forwards; /* Firefox */
    -o-animation: fadeInScaleUp 0.6s ease-out forwards; /* Opera */
    animation: fadeInScaleUp 0.6s ease-out forwards;
}

@-webkit-keyframes fadeInScaleUp {
    to {
        opacity: 1;
        -webkit-transform: scale(1); /* Safari and Chrome */
        transform: scale(1);
    }
}

@-moz-keyframes fadeInScaleUp {
    to {
        opacity: 1;
        -moz-transform: scale(1); /* Firefox */
        transform: scale(1);
    }
}

@-o-keyframes fadeInScaleUp {
    to {
        opacity: 1;
        -o-transform: scale(1); /* Opera */
        transform: scale(1);
    }
}

@keyframes fadeInScaleUp {
    to {
        opacity: 1;
        -webkit-transform: scale(1); /* Safari and Chrome */
        -moz-transform: scale(1); /* Firefox */
        -ms-transform: scale(1); /* IE 9 */
        -o-transform: scale(1); /* Opera */
        transform: scale(1);
    }
}