Undo last change, it broke asset precompilation. Rename style.css to scss for inclusion and force recompilation of all assets.

app/assets/stylesheets/darkswarm/all.scss

@@ -10,7 +10,6 @@
 @import 'foundation-icons';
 
 @import '*';
-@import 'style';
 
 ofn-modal {
   display: block;

config/application.rb

@@ -79,7 +79,7 @@ module Openfoodnetwork
     config.assets.enabled = true
 
     # Version of your assets, change this if you want to expire all your assets
-    config.assets.version = '1.1'
+    config.assets.version = '1.2'
 
     config.sass.load_paths += [
       "#{Gem.loaded_specs['foundation-rails'].full_gem_path}/vendor/assets/stylesheets/foundation/components",