.vml-map {
    width: 100%;
    position: relative;
    overflow: hidden;
}

.vml-map--filter-grayscale { filter: grayscale(100%); }
.vml-map--filter-invert { filter: invert(100%) hue-rotate(180deg); }
.vml-map--filter-saturate { filter: saturate(200%); }
.vml-map--filter-sepia { filter: sepia(80%); }

.vml-map .leaflet-container {
    width: 100%;
    height: 100%;
}