It turns out not having the viewport meta tag set is the entire reason
the site has looked awful on mobile browsers since about
... 2012. Whoops!
<meta name="generator" content="muse.el" />
<meta http-equiv="<lisp>muse-html-meta-http-equiv</lisp>"
content="<lisp>muse-html-meta-content-type</lisp>" />
+ <meta name="viewport"
+ content="width=device-width, initial-scale=1.0" />
<link href="https://feeds.unknownlamer.org/rss/site-updates"
rel="alternate" type="application/rss+xml" title="Updates Feed" />