.eventteaser {
    clear: both; 
    border: solid #E9E9E9 1px; 
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    border-radius: 10px;
}

.img-teaser-left {
    background-image: url(/user/themes/bootstrap4/assets/Box3.jpg);
    background-position: center center;
    overflow: hidden; 
    width: 30px; 
    height: 100%; 
    left: 0;
    position: absolute;
}