diff --git a/css/entity_browser.entity_reference.css b/css/entity_browser.entity_reference.css
new file mode 100644
index 0000000..e0212f6
--- /dev/null
+++ b/css/entity_browser.entity_reference.css
@@ -0,0 +1,20 @@
+/**
+ * @file
+ * Styles for Entity reference items.
+ *
+ * These styles are compatible with Bartik, Seven, and Classy themes.
+ */
+
+/**
+ * Entity reference items.
+ */
+.block-file-browser-form .entities-list .item-container {
+    display: inline-block;
+    margin: 10px 10px 15px;
+    text-align: center;
+}
+
+.block-file-browser-form .entities-list .item-container img, .block-file-browser-form .entities-list .item-container input {
+    display: block;
+    margin: 5px auto 0;
+}
diff --git a/entity_browser.libraries.yml b/entity_browser.libraries.yml
index c4cb5da..e13cbf9 100644
--- a/entity_browser.libraries.yml
+++ b/entity_browser.libraries.yml
@@ -22,6 +22,9 @@ iframe_selection:
 
 entity_reference:
   version: VERSION
+  css:
+    component:
+      css/entity_browser.entity_reference.css: {}
   js:
     js/entity_browser.entity_reference.js: {}
   dependencies: