.leaflet-control-better-filelayer {
    background-color: #fafafa;
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-radius: 2px;
    background-image: url(https://unpkg.com/leaflet-better-filelayer@0.1.1/dist/3af9a1795ef60ecd7179.svg);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    width: 34px;
    height: 34px;
    cursor: pointer;
}

.leaflet-control-better-filelayer input[type="file"] {
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}