@import url('https://font.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #6563ff;

}

.wrapper {
    height: 400px;
    width: 400px;
    padding: 25px;
    background: #f8f8f8;
    border-radius: 10px;

}

.cards,
.card .v {
    display: flex;
    align-items: center;
    justify-content: center;

}




.cards {
    height: 100%;
    width: 100%;
    flex-wrap: wrap;
    justify-content: space-between;
}

.cards .card {
    position:relative;
    cursor: pointer;
    perspective: 800px;
    transform-style:preserve-3d;
    height: calc(100% / 4 - 10px);
    width: calc(100% / 4 - 10px);
}

.card.shake{
    animation: shake 0.35s ease-in-out;

}
@keyframes shake {
    0%, 100%{
        transform: translateX(0);
    }
    20%{
        transform:translateX(-13px);
    }
    40%{
        transform:translateX(13px);
    }
    60%{
        transform:translateX(-8px);
    }
    80%{
        transform:translateX(8px);
    }
}

.cards .card .v {
    width: 100%;
    height: 100%;
    user-select: none;
    pointer-events: none;
    position:absolute;
    background: #fff;
    border-radius: 7px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.card .fv span {
    color: #6563ff;
    font-size: 40px;
}

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

.card .v {
    backface-visibility: hidden;
    transition: transform 0.5s;
}

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

.card.flip .bv {
    transform: rotateY(0);
}





.card .bv img {

    max-width: 45px;
}


.cards {
    list-style: none;
    padding: 0;
    margin: 0;

}