.banner__imagen{
    background: url('../../img/banner.png') no-repeat center / cover;
    width: 100%; 
}

@media screen and (min-width:0px) {
    .banner__imagen{
        height: calc(100vh - 51px);;
    }
    
}

@media screen and (min-width:768px) {
    .banner__imagen{
        height: calc(100vh - 72px);
    }
}