Index: src/wp-content/themes/twentyfifteen/css/editor-style.css
===================================================================
--- src/wp-content/themes/twentyfifteen/css/editor-style.css	(revision 29907)
+++ src/wp-content/themes/twentyfifteen/css/editor-style.css	(working copy)
@@ -32,7 +32,7 @@
 	font-family: "Noto Serif", sans-serif;
 	font-weight: 400;
 	line-height: 1.6842;
-	margin: 83px 0 83px 83px;
+	margin: 10%;
 	vertical-align: baseline;
 }
 
@@ -455,10 +455,6 @@
 	unicode-bidi: embed;
 }
 
-.rtl body {
-	margin: 83px 83px 83px 0;
-}
-
 .rtl blockquote {
 	border-right: 4px solid #707070;
 	border-left: none;
@@ -488,4 +484,4 @@
 
 .rtl .wp-caption.alignleft {
 	margin: 8px 32px 8px 0;
-}
\ No newline at end of file
+}