Combine styles with the :is pseudo-class selector

The :is pseudo-class selector applies the styles for any element that matches a selector listed in the arguments.
Rather than writing separate selectors:
header a:hover,
nav a:hover,
footer a:hover {
text-decoration: underline;
}
We can combine them into a single one as following:
:is(header, nav, footer) a:hover {
text-decoration: underline;
}