.SingleBox {
    display:block;
    position:relative;
    max-width:300px;
    min-height:300px;
    margin-left:auto;
    margin-right:auto;
    padding:5px;
 background-position:center center;
    background-size:100% auto;  
    background-repeat:no-repeat;  
}



.EditingArea.BreakPoint860 .SingleBox ,
.EditingArea.BreakPoint660 .SingleBox  ,
.EditingArea.BreakPoint440 .SingleBox  
{
         background-size:auto 100%;  
}

@media screen and (max-width:860px) {
    .SingleBox{
            background-size:auto 100%;  
    }
}
    .SingleBox > div {
        text-align:left;
    }

.EditingArea .SingleBox
{ 
    border: 0.5px dashed green;
}