remove background for code highlighting
diff --git a/content/resources/css/arduino-light.css b/content/resources/css/arduino-light.css
index a4fe42e..b412f47 100644
--- a/content/resources/css/arduino-light.css
+++ b/content/resources/css/arduino-light.css
@@ -4,12 +4,11 @@
 
 From https://raw.githubusercontent.com/highlightjs/highlight.js/main/src/styles/arduino-light.css
 
-Modified the background to be #f5f5f5
+Remove the background for .hljs class
 
 */
 
 .hljs {
-  background: #f7f7f9;
   color: #434f54;
 }