diff -u b/core/modules/node/css/node.admin.css b/core/modules/node/css/node.admin.css
--- b/core/modules/node/css/node.admin.css
+++ b/core/modules/node/css/node.admin.css
@@ -50,7 +50,7 @@
   .layout-region-node-secondary .form-number,
   .layout-region-node-secondary .form-color,
   .layout-region-node-secondary textarea {
-    box-sizing:         border-box;
+    box-sizing: border-box;
     width: 100%;
     max-width: 100%;
   }
only in patch2:
unchanged:
--- a/core/modules/node/css/node.module.css
+++ /dev/null
@@ -1,75 +0,0 @@
-/**
- * @file
- * Styles for administration pages.
- */
-
-/**
- * Node add/edit form layout
- */
-
-/* Narrow screens */
-.layout-region {
-  box-sizing:         border-box;
-}
-
-/* Wide screens */
-@media
-  screen and (min-width: 780px),
-  (orientation: landscape) and (min-device-height: 780px) {
-
-  .layout-region-node-main,
-  .layout-region-node-footer {
-    float: left; /* LTR */
-    width: 65%;
-    padding-right: 2em; /* LTR */
-  }
-
-  [dir="rtl"] .layout-region-node-main,
-  [dir="rtl"] .layout-region-node-footer {
-    float: right;
-    padding-left: 2em;
-    padding-right: 0;
-  }
-
-  .layout-region-node-secondary {
-    float: right; /* LTR */
-    width: 35%;
-  }
-
-  [dir="rtl"] .layout-region-node-secondary {
-    float: left;
-  }
-
-  /* @todo File an issue to add a standard class to all text-like inputs */
-  .layout-region-node-secondary .form-autocomplete,
-  .layout-region-node-secondary .form-text,
-  .layout-region-node-secondary .form-tel,
-  .layout-region-node-secondary .form-email,
-  .layout-region-node-secondary .form-url,
-  .layout-region-node-secondary .form-search,
-  .layout-region-node-secondary .form-number,
-  .layout-region-node-secondary .form-color,
-  .layout-region-node-secondary textarea {
-    box-sizing:         border-box;
-    width: 100%;
-    max-width: 100%;
-  }
-}
-
-/**
- * The vertical toolbar mode gets triggered for narrow screens, which throws off
- * the intent of media queries written for the viewport width. When the vertical
- * toolbar is on, we need to suppress layout for the original media width + the
- * toolbar width (240px). In this case, 240px + 780px.
- */
-@media
-  screen and (max-width: 1020px) {
-
-  .toolbar-vertical.toolbar-tray-open .layout-region-node-main,
-  .toolbar-vertical.toolbar-tray-open .layout-region-node-footer,
-  .toolbar-vertical.toolbar-tray-open .layout-region-node-secondary {
-    float: none;
-    width: auto;
-    padding-right: 0;
-  }
-}