diff --git a/core/modules/file/css/file.admin.css b/core/modules/file/css/file.admin.css
deleted file mode 100644
index 6a45644..0000000
--- a/core/modules/file/css/file.admin.css
+++ /dev/null
@@ -1,18 +0,0 @@
-/**
- * @file
- * Admin stylesheet for file module.
- */
-
-/* File upload widget.*/
-.form-managed-file .form-submit {
-  margin: 0 0.5em;
-}
-.form-managed-file div.ajax-progress-bar {
-  display: none;
-  margin-top: 4px;
-  padding: 0;
-  width: 28em;
-}
-.form-managed-file .ajax-progress-bar .bar {
-  margin: 0;
-}
diff --git a/core/themes/seven/css/components/file-upload.css b/core/themes/seven/css/components/file-upload.css
new file mode 100644
index 0000000..6a45644
--- /dev/null
+++ b/core/themes/seven/css/components/file-upload.css
@@ -0,0 +1,18 @@
+/**
+ * @file
+ * Admin stylesheet for file module.
+ */
+
+/* File upload widget.*/
+.form-managed-file .form-submit {
+  margin: 0 0.5em;
+}
+.form-managed-file div.ajax-progress-bar {
+  display: none;
+  margin-top: 4px;
+  padding: 0;
+  width: 28em;
+}
+.form-managed-file .ajax-progress-bar .bar {
+  margin: 0;
+}