body {
    font-size: 12px;
}

.table_of_contents {
    width: 20em;
    height: 500px;
    position: fixed;
    top: 2em;
    left: 1px;
    overflow-y: scroll;
    padding-left: 2em;
}

.big_list_of_images {
    padding-left: 30em;
}


.thumbnail {
    vertical-align: top;
}

.table_of_content_entry {
    display: block;
}