.dropbox{outline:2px dashed grey;outline-offset:-10px;background:#e0ffff;color:dimgray;padding:10px;min-height:200px;position:relative;cursor:pointer}.input-file{opacity:0;width:100%;height:200px;position:absolute;cursor:pointer}.dropbox:hover{background:#add8e6}.dropbox p{font-size:1.2em;text-align:center;padding:50px 0}.warning{color:red}