Center A Resizeable Image Vertically And Horizontally In A Container With Hover And Background

A snippet that will centre an image within a container. The image also has a hover and background element ‘on’ the image.


                                          Markup:                                 
     CSS: body {
    background: #FAFAFA;
}
 .cell-wrapper {
    display: table;
}
 /* Cell */.thumb-wrapper {
    display: table-cell;
    text-align: center;
    vertical-align: middle;
         background: #EEEEEE;
    width: 139px;
    height: 182px;
}
 .thumb {
    display: inline-block;
    position: relative;
}
 img {
    position: relative;
    z-index: 1;
    border: 1px solid;
    display: block;
}
 /*Background*/.thumb:after {
    content: '';
    width: 100%;
    height: 100%;
    background: #FFF;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    -webkit-box-shadow: 2px 2px 2px 0px #898989;
    -moz-box-shadow: 2px 2px 2px 0px #898989;
    box-shadow: 2px 2px 2px 0px #898989;
}
 /* Offset background for paging effect */.thumb.multi:after {
    content: '';
    margin-left: 2px;
    margin-top: 2px;
}
 /* Hover */.thumb.selectable:before {
    content: "";
    opacity: 0;
    width: 100%;
    height: 100%;
    background: black;
    display: block;
    position: absolute;
    cursor: pointer;
    z-index: 2;
}
 .thumb.selectable:hover:before {
    opacity: 0.2;
}