Leather Diary – Menu on mobile device

The menu displays and functions fine when my blog is viewed from a desktop, but the menu is not displayed when I view the blog on a mobile device. When I type the names of the pages (i.e. Essays) in the search field, I am directed to the page; however, visitors who don’t already know what my pages are called will not be able to view anything but the main page. How do I make the pages menu visible on a mobile device? My site is http://www.katestrassel.com. Thanks!