diff --git a/oslosphinx/theme/openstack/static/tweaks.css b/oslosphinx/theme/openstack/static/tweaks.css
index 6d3bea3..9b3a6ce 100644
--- a/oslosphinx/theme/openstack/static/tweaks.css
+++ b/oslosphinx/theme/openstack/static/tweaks.css
@@ -101,4 +101,15 @@ div.sphinxsidebar h3.highlighted {
 
 div.sphinxsidebar h3.highlighted a {
   color: #EEE;
-}
\ No newline at end of file
+}
+
+/** provide visual separation for sidebar for increased readability. */
+div.sphinxsidebar ul li {
+  margin-top: 1em;
+  font-weight: bold;
+}
+
+div.sphinxsidebar ul li ul li {
+  margin-top: 0;
+  font-weight: normal;
+}