.simple-toc {
    padding: 15px;
    margin: 20px 0;
    border-left: 4px solid #0073aa;
    font-size: 16px;
}
.simple-toc ul {
    margin: 0;
    padding: 0;
    list-style: none;
}
.simple-toc li {
    margin: 5px 0;
}
.simple-toc a {
    color: #0073aa;
    text-decoration: none;
}
.simple-toc a:hover {
    text-decoration: underline;
}