div.toggle-switch {
    color:#fff;
    padding:10px;
    background:#3e7472;
    cursor:pointer;
    text-align:center;
}
div.toggle-switch > span{
    display:block;
    color:#fff;
}
div.open span{
    background:#000;
}
div.toggle-contents ul > li{
    padding:15px;
    border-bottom: 1px solid gray;
    text-align:center;
}