div#toc ul li {
    margin: 8px 0px 8px 22px;
    font-size: 90%;
    list-style: square;
}
div#toc ul {
    background-color: whitesmoke;
    padding: 5px;
    border-radius: 5px;
    max-width: 300px;
    color: gray;
}

div#toc ul li ul {
    padding-left:8px;

}

div#toc ul li ul li::before {
    content: "–  ";
}

div#toc >ul::before {
    content: "Table of Contents";
    font-weight: 500;
    color: #555;
    text-align:center;
    margin-left:auto;
    margin-right:auto;
    width:70px;
    padding-top:20px;
    padding-bottom:20px;
    padding-left:10px;
}