diff --git a/docs/assets/style.css b/docs/assets/style.css
index 1bd6618..5a1af06 100644
--- a/docs/assets/style.css
+++ b/docs/assets/style.css
@@ -69,6 +69,13 @@ pre {
   font-size: 16pt;
 }
 
+/* notes */
+.section .note {
+  margin: 5pt 0;
+  text-align: center;
+  font-size: 12pt;
+}
+
 /* Hyperlink (such as Paper and Code) */
 .section .link {
   margin: 5pt 0;