@media only screen and (max-width: 580px) {
    .nuevaClase

{
    display: block;
}

.custom-button {
    text-align: center;
    display: block;
    width: 100%
}

.custom-chk {
    text-align: center;
    display: block;
}

}

@media only screen and (max-width: 830px) {
    .nuevaClase {
        display: block;
    }


}

.mr-10 {
    margin-right: 10px
}