diff --git a/samples/deepseek-r1-webgpu/src/components/Chat.css b/samples/deepseek-r1-webgpu/src/components/Chat.css
index 68c7e4e..4f78793 100644
--- a/samples/deepseek-r1-webgpu/src/components/Chat.css
+++ b/samples/deepseek-r1-webgpu/src/components/Chat.css
@@ -14,7 +14,7 @@
 
   pre,
   code {
-    background-color: #f2f2f2;
+    background-color: transparent;
   }
 
   @media (prefers-color-scheme: dark) {