L.Control.Basemaps.css

.basemaps {
    padding: 4px;
}
.basemaps.closed .basemap {
    display: none;
}
.basemaps.closed .basemap.alt {
    display: inline-block;
}
.basemaps.closed .basemap.alt h4 {
    display: none;
}

.basemap {
    display: inline-block; /* todo: flexbox? */
    cursor: pointer;
}
.basemap.active img {
    border-color: orange;
    box-shadow: 2px 2px 4px #000;
}
.basemap img {
    width: 64px;
    border: 2px solid #FFF;
    margin: 0 2px;
    border-radius: 40px;
    box-shadow: 0 1px 5px rgba(0,0,0,0.65)
}