.leaflet-control-google-labels {
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.4);
    background: #fff;
    border-radius: 5px;

    width: 36px;
    height: 36px;
    display: block;

    line-height: 36px;
    font-weight: bold;
    text-align: center;
    font-family: serif;
}

.leaflet-control-google-labels:hover {
    cursor: pointer;
    background-color: #f4f4f4
}