img.card-img-top {
    /* height: 100%;
    width: 100%; */
    max-width: 300px;
    max-height: 150px;
    display: block;
    margin-left: auto;
    margin-right: auto;

    width:100%;
    height: auto;
    overflow:hidden;
}

p.card-text {
    line-height: 1.3;
    font-size: 80%;
}

h6.card-subtitle {
    font-size: 80%;
}

h5.card-title {
    line-height: 1.3;
}