div.locate-popup {
    position: absolute;
    text-align: center;
    transform: translate(-50%,calc(-100% - 1em));
    background: white;
    box-shadow: 0 3px 14px rgba(0,0,0,0.4);
    white-space: nowrap;
    border-radius: 12px;
    padding: 1em 2em 1em 1em;
}

div.locate-popup:after {
    content: '';
    display: block;
    position: absolute;
    left: calc(50% - 1em);
    bottom: -1em;
    width: 0;
    height: 0;
    border-left: 1em solid transparent;
    border-right: 1em solid transparent;
    border-top: 1em solid white;
}

a.locate-popup-close {
    position: absolute;
    top: 0.25em;
    right: 0.25em;
    text-decoration: none;
    font-weight: bold;
    font-size: 125%;
    color: black;
}