diff --git a/app/assets/stylesheets/editor.css.scss b/app/assets/stylesheets/editor.css.scss
index 755e3409..a38157b4 100644
--- a/app/assets/stylesheets/editor.css.scss
+++ b/app/assets/stylesheets/editor.css.scss
@@ -42,13 +42,14 @@ button i.fa-spin {
   background-color: #008CBA;
   margin-top: 0;
   width: 100%;
+  display: flex;
 
   button {
     font-size: 80%;
   }
 
   button, .btn-group {
-    width: 33.33333%;
+    flex-grow: 1;
   }
 
   .btn-group {
@@ -191,4 +192,4 @@ button i.fa-spin {
 
 .enforce-bottom-margin {
   margin-bottom: 5px !important;
-}
\ No newline at end of file
+}