CSS

target button of fileinput css

.upload-btn {

    display: block;
    text-align: center;
    margin: 20px auto 20px;
    width: 50%;
    height: 30px;
    background-color: #fcff7f;
    line-height: 30px;

    }

.upload-btn:hover {
    background-color: #c39d5a;
    color: white;
    cursor: pointer;
    }