#pic-preview{position:fixed;left:0;top:0;width:100vw;height:100vh;overflow:auto;z-index:1000}#pic-preview .background{width:100%;min-height:100vh;position:absolute;left:0;top:0;z-index:1;background-color:rgba(0,0,0,.9);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}#pic-preview img{position:relative;z-index:2}