.stl-viewer{
    width:100%;
    padding-top:100%;
    position:relative;
    text-align:center;
    vertical-align:middle
}
.stl-viewer canvas{
    position:absolute;
    height:250px;
    top:0;
    left:0;
    bottom:0;
    right:0
}

.svs-custom{
    padding-top:0% !important;
    margin:0 auto
}

.svs-4-3{
    padding-top:100% !important
}

.svs-16-9{
    padding-top:100% !important
}

@media (min-width: 600px){
    .stl-viewer{
        padding-top:56.25%
    }
    .svs-4-3{
        padding-top:75% !important
    }
    .svs-16-9{
        padding-top:56.25% !important
    }
}