Added a CSS responsive menu to the site that replaces the jump links in the body of each page. On a desktop browser, this puts a menu strip above the top, like so:
On small-screen devices, it collapses like so:
And opens like so:
I've also added a Google-powered search box in the corner, which is kind of redundant, so I'm not sure it'll stick around. Let me know if you like it or hate it.