diff --git a/_config.yml b/_config.yml
index c5384d2b..2a986b54 100644
--- a/_config.yml
+++ b/_config.yml
@@ -54,3 +54,5 @@ defaults:
       path: ''
     values:
       layout: default
+sass:
+  style: compressed
diff --git a/css/main.css b/css/main.scss
similarity index 99%
rename from css/main.css
rename to css/main.scss
index 519424f4..556222c7 100644
--- a/css/main.css
+++ b/css/main.scss
@@ -1,3 +1,6 @@
+---
+---
+
 /*
 CSS for semver.org
 @author Mathias Bynens