.dropzone{
    min-height:150px;
    border:1px solid #f1f1f1;
    background:#f4f7fa;
    padding: 20px;
    box-shadow: none;
}
.dropzone.dz-clickable .dz-message{
    cursor:pointer;
    text-align:center;
    margin: 4em 0;
}
.dz-message span{
    font-size: 18px;
}