.mapboxgl-canvas {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.mapboxgl-popup-close-button {
    font-size:2em;
    top:10px !important;
    right:10px !important;
    color: #fff;
    background-color: #9f9f9f !important;
    border-radius: 0.5em !important;
    padding: 0em 0.15em 0.18em !important;
}
.mapboxgl-popup-close-button:hover {
    background-color: #454545 !important;
}