.custom-input-file {
    cursor: pointer;
    margin: auto;
    position: relative;
    width: 100%;
}

.custom-input-file input[type=file] {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    top: 0;
    left: 0;
    z-index: 100;
}