diff --git a/assets/css/main.css b/assets/css/main.css
index f00f984..7ebd9c0 100644
--- a/assets/css/main.css
+++ b/assets/css/main.css
@@ -332,3 +332,7 @@ hr {
 .hidden {
   display: none;
 }
+
+sup {
+ line-height: 0; 
+}