diff --git a/scss/topic.scss b/scss/topic.scss
index 4d4beba..c995ae0 100644
--- a/scss/topic.scss
+++ b/scss/topic.scss
@@ -48,7 +48,7 @@
 
 #topic-title {
   @include breakpoint(extra-large, $rule: min-width) {
-    z-index: 999;
+    z-index: z("composer", "content") - 1;
     padding: var(--spacing-block-l) var(--spacing-inline-xl);
     position: sticky;
     margin-bottom: 0;