diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -9,7 +9,7 @@
   'names' => array(
     'conpherence.pkg.css' => 'cea72e09',
     'conpherence.pkg.js' => '6249a1cf',
-    'core.pkg.css' => 'f7ab1e0b',
+    'core.pkg.css' => '9d155da1',
     'core.pkg.js' => '1a77dddf',
     'darkconsole.pkg.js' => 'e7393ebb',
     'differential.pkg.css' => 'a4ba74b5',
@@ -109,7 +109,7 @@
     'rsrc/css/application/tokens/tokens.css' => '3d0f239e',
     'rsrc/css/application/uiexample/example.css' => '528b19de',
     'rsrc/css/core/core.css' => 'd0801452',
-    'rsrc/css/core/remarkup.css' => 'dda84e80',
+    'rsrc/css/core/remarkup.css' => 'e70ca862',
     'rsrc/css/core/syntax.css' => '769d3498',
     'rsrc/css/core/z-index.css' => 'd1270942',
     'rsrc/css/diviner/diviner-shared.css' => 'aa3656aa',
@@ -809,7 +809,7 @@
     'phabricator-object-selector-css' => '85ee8ce6',
     'phabricator-phtize' => 'd254d646',
     'phabricator-prefab' => '8d40ae75',
-    'phabricator-remarkup-css' => 'dda84e80',
+    'phabricator-remarkup-css' => 'e70ca862',
     'phabricator-search-results-css' => '7dea472c',
     'phabricator-shaped-request' => '7cbe244b',
     'phabricator-slowvote-css' => 'a94b7230',
diff --git a/webroot/rsrc/css/core/remarkup.css b/webroot/rsrc/css/core/remarkup.css
--- a/webroot/rsrc/css/core/remarkup.css
+++ b/webroot/rsrc/css/core/remarkup.css
@@ -557,7 +557,7 @@
 
 .remarkup-control-fullscreen-mode textarea.remarkup-assist-textarea {
   position: absolute;
-  top: 27px;
+  top: 32px;
   left: 0;
   right: 0;
   bottom: 0;
@@ -566,6 +566,16 @@
   border-width: 1px 0 0 0;
   outline: none;
   resize: none;
+  background: #fff !important;
+}
+
+.remarkup-control-fullscreen-mode textarea.remarkup-assist-textarea:focus {
+  border-color: none;
+  box-shadow: none;
+}
+
+.remarkup-control-fullscreen-mode .remarkup-assist-button .fa-arrows-alt {
+  color: {$sky};
 }
 
 .phabricator-image-macro-hero {