nav: bump nav-item font-size to 1.4rem

style.css

@@ -2179,6 +2179,7 @@ ul.nav .list-group-item a {
   color: #fff;
   font-family: 'Playfair Display', serif;
   font-weight: 700;
+  font-size: 1.4rem;
 }
 ul.nav .list-group-item a:hover {
   color: #25c2a0;