.button-add-file input {
    display: none;
}

span.file-button {
    border: 1px solid #dadada;
    background-color: white;
    width: 342px;
    height: 40px;
    padding: 0px 18px;
    display: -webkit-box;
    display: -webkit-flex;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -moz-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -moz-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    color: #4f4f4f;
    font-size: 12px;
    text-transform: uppercase;
    cursor: pointer;
    -webkit-transition: all 200ms;
    -o-transition: all 200ms;
    -moz-transition: all 200ms;
    transition: all 200ms;
    position: relative;
}