.leaflet-container .leaflet-control-customprint > button {
    background-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 0 5px #bbb;
    height: 30px;
    width: 30px;
    padding-top: 3px;
    padding-bottom: 3px;
    text-align: center;
    border-radius: 3px;
    color: #333;
    font: 14px/1.5 "Helvetica Neue", Arial, Helvetica, sans-serif;
}