@media (min-width: 576px)
.bd-example {
    padding: 1.5rem;
    margin-right: 0;
    margin-left: 0;
    border-width: 1px;
    border-top-left-radius: 0.25rem;
    border-top-right-radius: 0.25rem;
}
.bd-example {
    position: relative;
    padding: 1rem;
    margin: 1rem -0.75rem 0;
    border: solid #dee2e6;
    border-width: 1px 0 0;
}
img.mediana{
   width: 150px;
    height: 100px;
        margin-top: 10px;
}

.card.revista{
	background-color: #eeeeee;
/*width: 500px;*/
    margin-left: 30px;
    margin-top: 25px;
    padding-left: 10px;
    padding-bottom: 20px;
}