.btnCast {
    width: 28px;
    height: 28px;
    padding: 0;
    background-color: transparent;
    border: 0;
    background-size: 100%;
    vertical-align: middle;
    margin: 0 .6em;
}

.btnDefaultCast {
    background-image: url(images/chromecast/ic_media_route_off_holo_dark.png);
}

.btnActiveCast {
    background-image: url(images/chromecast/ic_media_route_on_holo_dark.png);
}