.fileinput-button,
  #admin-styles .responsive-css .fileinput-button {
    position: relative;
    overflow: hidden;
}

.fileinput-button input,
  #admin-styles .responsive-css .fileinput-button input {
    position: absolute;
    top: 0;
    right: 0;
    margin: 0;
    opacity: 0;
    -ms-filter: 'alpha(opacity=0)';
    font-size: 200px;
    direction: ltr;
    cursor: pointer;
}

@media screen\9 {
    .fileinput-button input,
    #admin-styles .responsive-css .fileinput-button input {
        filter: alpha(opacity=0);
        font-size: 100%;
        height: 100%;
    }
}