Modified the code-block style to use a sans-serif font (and included a nice margin and some padding).
diff --git a/article.css b/article.css
index f00e513..e1d5b6b 100644
--- a/article.css
+++ b/article.css
@@ -221,7 +221,11 @@
 }
 
 .code-block {
+	font-family: sans-serif;
 	white-space: pre; 
+	background: #e4e3f1;
+	margin:10px;
+	padding: 5px;
 }
 
 .itemizedlist ul {