.flex{display:-webkit-box;display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap}.img-box{position:relative;display:inline-block;margin-right:10px;margin-bottom:10px;padding:10px;border-radius:6px;background-color:#f0f2f5}.img-box:hover .icon-box{opacity:1}.icon-box{opacity:0;position:absolute;top:0;left:0;right:0;bottom:0;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;color:#fff;background-color:rgba(0,0,0,.6)}.modal-box{min-height:300px}.pdf-box{margin-bottom:10px}