html, body {
    height: 100%;
}

#openseadragon1 {
    background-color: rgb(60,60,60);
}

.groups-list, .groups-list li {
    margin: 0;
    padding: 0;
    list-style-type: none;
}

.groups-list {
    overflow: hidden; 
}

.groups-list li {
    float: left;
    background-color: rgb(220,220,220);
    margin-right: 15px;
}

.groups-list li a {
    display: block;
    padding: 15px;
}

.groups-list li:hover {
    background-color: rgb(180,180,180);    
    color: white;
}

.groups-list li:hover a {
    color: white;
}

.sub_title {
    font-size: 32px;
    margin-left: 30px;
    margin-top: 30px;
    line-height: 32px;
    float: left;
    font-weight: bold;
    font-style: italic;
}

.back {
    position: absolute;
    right: 15px;
    top: 15px;
    opacity: 0.2;
    z-index: 1000000;
}

.back:hover {
    opacity: 1;
}

.zoom-image {
    position: relative;
}

.zoom-image img {
    width: 100%;
    height: auto;
}

.quarters {
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
}

.zoom-image .quarter {
    border: 2px solid rgba(255,0,0,0.2);
    width: 14.28%;
    float: left;
    box-sizing: border-box;
}

.zoom-image .quarter:hover {
    border: 2px solid rgba(255,0,0,0.7);
}

.next a, .prev a, .top a, .down a {
    color: white;
}

.next, .prev, .top, .down {
    position: absolute;
    font-size: 64px;
    line-height: 64px;    
    text-shadow: 0px 0px 4px rgba(0,0,0,0.8);
    color: white;
    cursor: pointer;    
}

.next, .prev {
    top: 50%;
    margin-top: -32px;
}

.top, .down {
    left: 50%;
    margin-left: -32px;
}

.next:hover, .prev:hover, .top:hover, .down:hover {
    opacity: 0.7;
}

.next {
    right: 15px;
}

.prev {
    left: 15px;
}

.top {
    top: 15px;
}

.down {
    bottom: 15px;
}