.recipe-item .recipe-thumbnail-container .recipe-thumbnail-front {
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.recipe-item:nth-child(odd) .recipe-thumbnail-container .recipe-thumbnail-front {
    background-image: url(../images/bg-red.png);
}

.recipe-item:nth-child(even) .recipe-thumbnail-container .recipe-thumbnail-front {
    background-image: url(../images/bg-yellow.png);
}