diff --git a/core/modules/system/css/system.theme.css b/core/modules/system/css/system.theme.css
index 4e83886..767fa71 100644
--- a/core/modules/system/css/system.theme.css
+++ b/core/modules/system/css/system.theme.css
@@ -89,15 +89,11 @@ abbr.form-required, abbr.tabledrag-changed, abbr.ajax-changed {
 .form-item select.error {
   border: 2px solid red;
 }
-.button,
-.image-button {
+.button + .button,
+.button + .image-button,
+.image-button + .image-button {
+.image-button + .button {
   margin-left: 1em;
-  margin-right: 1em;
-}
-.button:first-child,
-.image-button:first-child {
-  margin-left: 0;
-  margin-right: 0;
 }
 
 /**