#preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    overflow: hidden;
    background: #fff;
}

#map {
    height: 100vh;
}

.country-selector {
    position: absolute;
    top: 2vh;
    left: 50vw;
    transform: translateX(-50%);
    z-index: 2000;
    width: auto;
}

.country-selector .dropdown-menu {
    max-height: 50vh;
    overflow-y: auto;
}