diff --git a/index.css b/index.css
index f442d64..85a7578 100644
--- a/index.css
+++ b/index.css
@@ -42,5 +42,5 @@ figure figcaption {
 }
 
 details[open] {
-    width: 32em;
+    max-width: 32em;
 }
\ No newline at end of file