Add some margin to the bottom of the page

index.html

@@ -64,7 +64,7 @@ <h2 class="mb-5 tm-content-title">Welcome to Toaq!</h2>
                         <p class="mt-5 my-2">A light introductory course is available here:</p>
                         <a href="/TwE/00" class="btn btn-primary tm-nav-link">Toaq with Ease</a>
                         <p class="mt-5 my-2">For a complete description of the language, read:</p>
-                        <a href="refgram/introduction/" class="btn btn-primary tm-nav-link">Reference Grammar of Toaq</a>
+                        <a href="refgram/introduction/" class="btn btn-primary tm-nav-link mb-5">Reference Grammar of Toaq</a>
                     </section>
                 </main>
             </div>