diff --git a/src/theme/css/general.css b/src/theme/css/general.css
index 7670b087d3..2467cdf42d 100644
--- a/src/theme/css/general.css
+++ b/src/theme/css/general.css
@@ -190,6 +190,10 @@ kbd {
     vertical-align: middle;
 }
 
+sup {
+    line-height: 0;
+}
+
 :not(.footnote-definition) + .footnote-definition,
 .footnote-definition + :not(.footnote-definition) {
     margin-block-start: 2em;