.card-side {
    height: 20rem;
    border-radius: 15px;
    transition: all 0.8s ease;
    backface-visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    width: 80%;
    padding:2rem;
    color: white;
    display:flex;
    justify-content:center;
    align-items:center;
}

.card-side.back {
    transform: rotateY(-180deg);
    background-color: #4158D0;
    background-image:linear-gradient(to right top,#fb6906,#5cf705);
}

.card-side.front {
    background-color: #0093E9;
    background-image:linear-gradient(to right top,#FB0712,#124FEB);
}

.card:hover .card-side.front {
    transform: rotateY(180deg);
}

.card:hover .card-side.back {
    transform: rotateY(0deg);
}