#container {
    position: relative;
    padding-bottom: 8rem;
}

#content {
    margin-top: 90px;
    scroll-behavior: smooth;
    position: relative;  /* for scrollspy */
}

#toc {
    margin-top: 90px;
    padding-bottom: 8rem;
}

footer {
    margin-top: 8rem;
}