html {
    scroll-behavior: smooth;
}

#toc {
    border: 1px solid #ddd;
    padding: 1em;
    margin-bottom: 2em;
    background: #f9f9f9;
}

#toc ul {
    list-style: none;
    padding-left: 0;
}

#toc li {
    margin: 0.3em 0;
}

#toc a {
    text-decoration: none;
}

#toc a:hover {
    text-decoration: underline;
}