diff --git a/src/css/main.scss b/src/css/main.scss
index 1d1faee..7021f3d 100644
--- a/src/css/main.scss
+++ b/src/css/main.scss
@@ -34,6 +34,10 @@ a {
   }
 }
 
+.center {
+  text-align: center;
+}
+
 pre code {
   overflow: scroll;
   padding-bottom: 15px;