#TopNavigation {
    position: sticky;
    top: 0;
    z-index: 1000;
    margin: 0 auto 2em auto;
    padding: 4px 12px;
    border-bottom: 1px solid #e5e5e5;
    background: #eee;
    max-width: 700px;
    text-align: left;
    box-sizing: border-box;

    -webkit-box-shadow: 1px 1px 1px #ccc;
    -moz-box-shadow: 1px 1px 1px #ccc;
    box-shadow: 1px 1px 1px #ccc;
}