/** styled the sup and sub tags when they are linked **/
a.sup > sup,
a.sub > sub {
    color: #0057b8;
    text-decoration-line: underline;
    text-decoration-color: #007fa3;
    text-decoration-thickness: 0.125rem;
    text-underline-offset: 6px;
}
a.sup > sup:hover,
a.sub > sub:hover {
    text-decoration-color: #0057b8;
}