div#envelope{
width: 80%;
margin: 1% 30% 1% 30%;
}


.containerCenter {
    background: #fff;
    height: 100%;
    padding: 0 0 0 20%;
    position: relative;
 }

.tableGroup {
    width: 100%;
    min-width: 100px;
    max-width: 300px;
   
}