.fondonegro {
    font-size:24px;
    line-height:28px;
    background-color: #000;
    color:#FFF;
    padding: 15px;
}
.imgresponsive {
    max-width: 100%;
    height: auto;
}


@media only screen and (max-width: 500px) {
    .imgcel {
        max-width: 120px !important;
        height: auto;
    }
}