#my-file{
    position:absolute;
    left:0;
    top:0;
    background:red;
    width:100%;
    height:100%;
    opacity:0;
}

#file-wrap{
    position:relative;
    height: auto;
    padding: 0 30px;
    background-color: #F8F9F9;
    display: block;
    border: 1px dashed #ccc;
    text-align: center;
    box-sizing:border-box;
    border-radius: 5px;
    cursor: pointer;
    /*box-shadow: 0 1px 1px 0 silver;*/
}