diff --git a/src/element/collapsible.css b/src/element/collapsible.css
index e4e31ee..9266cf4 100644
--- a/src/element/collapsible.css
+++ b/src/element/collapsible.css
@@ -27,7 +27,7 @@
   display: flex;
   align-items: center;
   justify-content: space-between;
-  margin: 8px;
+  margin: 8px 0;
 }
 
 .collapsed-event-header {