Removed most of minima theme's css.

assets/main.scss

@@ -0,0 +1,15 @@
+---
+# Only the main Sass file needs front matter (the dashes are enough)
+---
+@charset "utf-8";
+
+$spacing-unit:     30px;
+
+// Width of the content area
+$content-width:    800px;
+
+$on-palm:          600px;
+$on-laptop:        800px;
+
+// Import partials from the `90s` theme.
+@import "90s";