diff --git a/doc/themes/leon/static/css/leon.css_t b/doc/themes/leon/static/css/leon.css_t
index 80801cfa8dbd6521e99b3498d2407089d8c37b39..04398559c80617404673f4e3e2d66e484f8d00fe 100644
--- a/doc/themes/leon/static/css/leon.css_t
+++ b/doc/themes/leon/static/css/leon.css_t
@@ -217,7 +217,10 @@ div.document p {
 }
 
 div.document li.toctree-l1 {
-  margin-bottom: 1em;
+}
+
+div.document .toctree-wrapper ul {
+    margin: 0.5em 1.5em;
 }
 
 div.document .descname {