diff --git a/Layouts/boxes layout/css/main.css b/Layouts/boxes layout/css/main.css
index b007d04..b14a02f 100644
--- a/Layouts/boxes layout/css/main.css	
+++ b/Layouts/boxes layout/css/main.css	
@@ -1,3 +1,13 @@
+/*
+Add CSS variables here to change CSS of components
+Suppose you want to customize button from component, just add
+
+sm-button {
+--background : #CCC;
+}
+
+*/
+
 * {
   padding: 0;
   margin: 0;
@@ -479,4 +489,4 @@ main {
     background: rgba(var(--text-color), 0.1);
     cursor: pointer;
   }
-}
\ No newline at end of file
+}