.custom-popup {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5); /* semi-transparent black */
    z-index: 5000;
}

.omeka-map-timeline-wrapper .custom-popup {
    bottom: 200px;
}

.custom-popup-content {
    background: #fff;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    width: 90%;
    height: 80%;
}

.hidden {
    display: none;
}

.close-btn {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    position: absolute;
    right: 10px;
    top: 10px;
}

.omeka-map-timeline-wrapper {
    position: relative;
}

[id^="timeline-embed-timeline-"] {
    height: 200px!important;
}