/** IE10 upgrade overlay & message**/
.ie-dimmer-overlay {
    background: url("https://www.thegreatcourses.com/skin/frontend/enterprise/tgc/images/dimmer-ie.png") repeat scroll 0 0 transparent;
    display: none;
    height: 100%;
    left: 0;
    overflow: hidden;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 10000000;
}

.ie-upgrade-message {
    background: none repeat scroll 0 0 white;
    font: 500 23px/26px 'IBM Plex Serif',serif;
    height: 300px;
    left: 50%;
    margin-left: -250px;
    margin-top: -200px;
    padding: 30px;
    position: absolute;
    top: 50%;
    width: 500px;
    display: block !important;
}

.ie-upgrade-message p {
    margin-top: 25px !important;
}


.ie-upgrade-message img {
    margin-bottom: 10px;
}