diff --git a/docs/book/src/demo.css b/docs/book/src/demo.css
index 809ee87..f092756 100644
--- a/docs/book/src/demo.css
+++ b/docs/book/src/demo.css
@@ -64,7 +64,7 @@
     cursor: not-allowed;
 }
 
-.demo-container button ~ button {
+.demo-container button + button {
     margin-left: 0.8rem;
 }
 
@@ -134,4 +134,4 @@
     border-width: 2px;
     border-style: dashed;
     padding: 1.5rem;
-}
\ No newline at end of file
+}