Encourage login on zero matches (fixes #67)

Change-Id: Ic7805d2286de9fc24d06ca94c71b7ab4890f7973
diff --git a/dev/scss/main/main.scss b/dev/scss/main/main.scss
index f1d0048..67b48fa 100644
--- a/dev/scss/main/main.scss
+++ b/dev/scss/main/main.scss
@@ -52,6 +52,11 @@
       }
     }
   }
+
+  p.hint {
+    margin: 0 auto;
+    text-align: center;
+  }
 }
 
 blockquote {