:root {
    --time: 0.707s
}

.cards {
    display: grid;
}

.card {
    perspective: 40rem;
}

.card-body {
    transform-style: preserve-3d;
    transition: var(--time) transform;
    .card:hover & {
        transform: rotateX(-180deg);
    }
}

.card-front,
.card-back {
    backface-visibility: hidden;
}

.card-back {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    transform: rotateX(-180deg);
}


/* Make it Pretty */

body {
    line-height: 1.3;
    font-family: sans-serif;
}

.cards {
    grid-gap: 1.5rem;
    padding: 3rem;
    background: whitesmoke;
    grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
}

.card {
    display: flex;
    transition: transform calc(var(--time) / 4);
    text-decoration: none;
    color: inherit;
    &:active {
        transform: scale(0.975);
    }
}

.card-body {
    border-radius: 0.25rem;
    flex: 1;
}

.card-front,
.card-back {
    @extend .shadow;
    display: flex;
    align-items: center;
    background-color: white;
    box-sizing: border-box;
    padding: 1.5rem;
    border-radius: 0.25rem;
}

.card-front {
    font-size: 1.5rem;
}

.shadow {
    box-shadow: 0 -1px 1px rgba(0, 0, 0, 0.04), 0 2px 2px rgba(0, 0, 0, 0.04), 0 4px 4px rgba(0, 0, 0, 0.04), 0 8px 8px rgba(0, 0, 0, 0.04), 0 16px 16px rgba(0, 0, 0, 0.04);
}