.flip-card {
    perspective: 1000px;
}

.flip-card.show-forgot > .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-inner {
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card-front, .flip-card-back {
    position: absolute;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.flip-card-back {
    transform: rotateY(180deg);
}

.passw-err {
    display: none;
    color:red;
}