diff --git a/core/modules/edit/css/edit.base-rtl.css b/core/modules/edit/css/edit.base-rtl.css
new file mode 100644
index 0000000..18176aa
--- /dev/null
+++ b/core/modules/edit/css/edit.base-rtl.css
@@ -0,0 +1,28 @@
+/**
+ * @file edit.module-rtl.css
+ * RTL styles for edit module
+ */
+
+/* The toolbar contains toolgroups; these are visible. */
+.edit-toolgroup {
+  float: right;
+}
+
+/* Info toolgroup. */
+.edit-toolgroup.info {
+  float: right;
+}
+
+/* Operations toolgroup. */
+.edit-toolgroup.ops {
+  float: left;
+}
+
+/**
+ * Edit mode: buttons (in both modal and toolbar).
+ */
+#edit_modal button,
+.edit-toolbar button {
+  float: right;
+}
+
diff --git a/core/modules/edit/css/edit.css b/core/modules/edit/css/edit.base.css
similarity index 60%
rename from core/modules/edit/css/edit.css
rename to core/modules/edit/css/edit.base.css
index 6a5ac83..e9debbd 100644
--- a/core/modules/edit/css/edit.css
+++ b/core/modules/edit/css/edit.base.css
@@ -1,78 +1,4 @@
 /**
- * Animations.
- */
-.edit-animate-invisible {
-  opacity: 0;
-}
-
-.edit-animate-fast {
--webkit-transition: all .2s ease;
-   -moz-transition: all .2s ease;
-    -ms-transition: all .2s ease;
-     -o-transition: all .2s ease;
-        transition: all .2s ease;
-}
-
-.edit-animate-default {
-  -webkit-transition: all .4s ease;
-     -moz-transition: all .4s ease;
-      -ms-transition: all .4s ease;
-       -o-transition: all .4s ease;
-          transition: all .4s ease;
-}
-
-.edit-animate-slow {
--webkit-transition: all .6s ease;
-   -moz-transition: all .6s ease;
-    -ms-transition: all .6s ease;
-     -o-transition: all .6s ease;
-        transition: all .6s ease;
-}
-
-.edit-animate-delay-veryfast {
-  -webkit-transition-delay: .05s;
-     -moz-transition-delay: .05s;
-      -ms-transition-delay: .05s;
-       -o-transition-delay: .05s;
-          transition-delay: .05s;
-}
-
-.edit-animate-delay-fast {
-  -webkit-transition-delay: .2s;
-     -moz-transition-delay: .2s;
-      -ms-transition-delay: .2s;
-       -o-transition-delay: .2s;
-          transition-delay: .2s;
-}
-
-.edit-animate-disable-width {
-  -webkit-transition: width 0s;
-     -moz-transition: width 0s;
-      -ms-transition: width 0s;
-       -o-transition: width 0s;
-          transition: width 0s;
-}
-
-.edit-animate-only-visibility {
-  -webkit-transition: opacity .2s ease;
-     -moz-transition: opacity .2s ease;
-      -ms-transition: opacity .2s ease;
-       -o-transition: opacity .2s ease;
-          transition: opacity .2s ease;
-}
-
-.edit-animate-only-background-and-padding {
-  -webkit-transition: background, padding .2s ease;
-     -moz-transition: background, padding .2s ease;
-      -ms-transition: background, padding .2s ease;
-       -o-transition: background, padding .2s ease;
-          transition: background, padding .2s ease;
-}
-
-
-
-
-/**
  * Candidate editables + editables being edited.
  *
  * Note: every class is prefixed with "edit-" to prevent collisions with modules
@@ -111,7 +37,6 @@
   border: 1px solid #eea0a0;
 }
 
-
 /* Editing (focused) editable. */
 .edit-form.edit-editable.edit-editing,
 .edit-field .edit-editable.edit-editing {
@@ -122,8 +47,6 @@
 }
 
 
-
-
 /**
  * Edit mode: modal.
  */
@@ -153,8 +76,6 @@
 }
 
 
-
-
 /**
  * Edit mode: type=direct.
  */
@@ -174,8 +95,6 @@
 }
 
 
-
-
 /**
  * Edit mode: type=form.
  */
@@ -204,8 +123,6 @@
 .edit-form input { max-width: 100%; }
 
 
-
-
 /**
  * Edit mode: toolbars
  */
@@ -293,7 +210,6 @@
 }
 
 
-
 /**
  * Edit mode: buttons (in both modal and toolbar).
  */
@@ -317,56 +233,3 @@
   display: inline-block;
 }
 
-/* Button with icons. */
-#edit_modal button span,
-.edit-toolbar button span {
-  width: 22px;
-  height: 19px;
-  display: block;
-  float: left;
-}
-.edit-toolbar span.close {
-  background: url('../images/close.png') no-repeat 3px 2px;
-  text-indent: -999em;
-  direction: ltr;
-}
-
-.edit-toolbar button.blank-button {
-  color: black;
-  background-color: #fff;
-  font-weight: bolder;
-}
-
-#edit_modal button.blue-button,
-.edit-toolbar button.blue-button {
-  color: white;
-  background-image: -webkit-linear-gradient(top, #6fc2f2 0%, #4e97c0 100%);
-  background-image: -moz-linear-gradient(top, #6fc2f2 0%, #4e97c0 100%);
-  background-image: linear-gradient(top, #6fc2f2 0%, #4e97c0 100%);
-  border-radius: 5px;
-}
-
-#edit_modal button.gray-button,
-.edit-toolbar button.gray-button {
-  color: #666;
-  background-image: -webkit-linear-gradient(top, #f5f5f5 0%, #ccc 100%);
-  background-image: -moz-linear-gradient(top, #f5f5f5 0%, #ccc 100%);
-  background-image: linear-gradient(top, #f5f5f5 0%, #ccc 100%);
-  border-radius: 5px;
-}
-
-#edit_modal button.blue-button:hover,
-.edit-toolbar button.blue-button:hover,
-#edit_modal button.blue-button:active,
-.edit-toolbar button.blue-button:active {
-  border: 1px solid #55a5d3;
-  box-shadow: 0 2px 1px rgba(0,0,0,0.2);
-}
-
-#edit_modal button.gray-button:hover,
-.edit-toolbar button.gray-button:hover,
-#edit_modal button.gray-button:active,
-.edit-toolbar button.gray-button:active {
-  border: 1px solid #cdcdcd;
-  box-shadow: 0 2px 1px rgba(0,0,0,0.1);
-}
diff --git a/core/modules/edit/css/edit.icons.css b/core/modules/edit/css/edit.icons.css
new file mode 100644
index 0000000..1814f84
--- /dev/null
+++ b/core/modules/edit/css/edit.icons.css
@@ -0,0 +1,58 @@
+/**
+ * @file edit.icons.css
+ * Styles for the edit module buttons with icons.
+ */
+
+/* Button with icons. */
+#edit_modal button span,
+.edit-toolbar button span {
+  width: 22px;
+  height: 19px;
+  display: block;
+  float: left;
+}
+.edit-toolbar span.close {
+  background: url('../images/close.png') no-repeat 3px 2px;
+  text-indent: -999em;
+  direction: ltr;
+}
+
+.edit-toolbar button.blank-button {
+  color: black;
+  background-color: #fff;
+  font-weight: bolder;
+}
+
+#edit_modal button.blue-button,
+.edit-toolbar button.blue-button {
+  color: white;
+  background-image: -webkit-linear-gradient(top, #6fc2f2 0%, #4e97c0 100%);
+  background-image: -moz-linear-gradient(top, #6fc2f2 0%, #4e97c0 100%);
+  background-image: linear-gradient(top, #6fc2f2 0%, #4e97c0 100%);
+  border-radius: 5px;
+}
+
+#edit_modal button.gray-button,
+.edit-toolbar button.gray-button {
+  color: #666;
+  background-image: -webkit-linear-gradient(top, #f5f5f5 0%, #ccc 100%);
+  background-image: -moz-linear-gradient(top, #f5f5f5 0%, #ccc 100%);
+  background-image: linear-gradient(top, #f5f5f5 0%, #ccc 100%);
+  border-radius: 5px;
+}
+
+#edit_modal button.blue-button:hover,
+.edit-toolbar button.blue-button:hover,
+#edit_modal button.blue-button:active,
+.edit-toolbar button.blue-button:active {
+  border: 1px solid #55a5d3;
+  box-shadow: 0 2px 1px rgba(0,0,0,0.2);
+}
+
+#edit_modal button.gray-button:hover,
+.edit-toolbar button.gray-button:hover,
+#edit_modal button.gray-button:active,
+.edit-toolbar button.gray-button:active {
+  border: 1px solid #cdcdcd;
+  box-shadow: 0 2px 1px rgba(0,0,0,0.1);
+}
diff --git a/core/modules/edit/css/edit.theme.css b/core/modules/edit/css/edit.theme.css
new file mode 100644
index 0000000..588106f
--- /dev/null
+++ b/core/modules/edit/css/edit.theme.css
@@ -0,0 +1,71 @@
+/**
+ * Animations.
+ */
+.edit-animate-invisible {
+  opacity: 0;
+}
+
+.edit-animate-fast {
+-webkit-transition: all .2s ease;
+   -moz-transition: all .2s ease;
+    -ms-transition: all .2s ease;
+     -o-transition: all .2s ease;
+        transition: all .2s ease;
+}
+
+.edit-animate-default {
+  -webkit-transition: all .4s ease;
+     -moz-transition: all .4s ease;
+      -ms-transition: all .4s ease;
+       -o-transition: all .4s ease;
+          transition: all .4s ease;
+}
+
+.edit-animate-slow {
+-webkit-transition: all .6s ease;
+   -moz-transition: all .6s ease;
+    -ms-transition: all .6s ease;
+     -o-transition: all .6s ease;
+        transition: all .6s ease;
+}
+
+.edit-animate-delay-veryfast {
+  -webkit-transition-delay: .05s;
+     -moz-transition-delay: .05s;
+      -ms-transition-delay: .05s;
+       -o-transition-delay: .05s;
+          transition-delay: .05s;
+}
+
+.edit-animate-delay-fast {
+  -webkit-transition-delay: .2s;
+     -moz-transition-delay: .2s;
+      -ms-transition-delay: .2s;
+       -o-transition-delay: .2s;
+          transition-delay: .2s;
+}
+
+.edit-animate-disable-width {
+  -webkit-transition: width 0s;
+     -moz-transition: width 0s;
+      -ms-transition: width 0s;
+       -o-transition: width 0s;
+          transition: width 0s;
+}
+
+.edit-animate-only-visibility {
+  -webkit-transition: opacity .2s ease;
+     -moz-transition: opacity .2s ease;
+      -ms-transition: opacity .2s ease;
+       -o-transition: opacity .2s ease;
+          transition: opacity .2s ease;
+}
+
+.edit-animate-only-background-and-padding {
+  -webkit-transition: background, padding .2s ease;
+     -moz-transition: background, padding .2s ease;
+      -ms-transition: background, padding .2s ease;
+       -o-transition: background, padding .2s ease;
+          transition: background, padding .2s ease;
+}
+