@keyframes zoominoutsinglefeatured {
    0% {
        transform: scale(1, 1);
    }
    50% {
        transform: scale(1.2, 1.2);
    }
    100% {
        transform: scale(1, 1);
    }
}

.cardcontainer img {
    animation: zoominoutsinglefeatured 1s infinite;
}