.carousel .carousel-item {  
    height: 75vh;    
}
.imageslide {
height: 100%;
display: block;
margin-left: auto;
margin-right: auto;
}
.imageslideportrait {
width: 120%;
display: block;
margin-left: -10%;
margin-right: auto;
}
.carousel-control-prev-icon, .carousel-control-next-icon {
    width: 1em;
    height: 1em;
    filter: invert(13%);  
}
@media screen and (max-width: 736px)
{.carousel-control-prev-icon, .carousel-control-next-icon {visibility: none;}
 .imageslide {width:100%; height: auto;} 
}