diff --git a/README.md b/README.md
index a5501bd..d452190 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 [ImageGallery] is a module for [Omeka S] that displays image media in an item.
 
+Idea seen at https://lubna.dev/create-css-only-image-gallery/
+
 ## Install
 
 ```
diff --git a/asset/css/gallery.css.orig b/asset/css/gallery.css.orig
new file mode 100644
index 0000000..b37d69f
--- /dev/null
+++ b/asset/css/gallery.css.orig
@@ -0,0 +1,45 @@
+
+* {
+  box-sizing: border-box;
+}
+
+img {
+  max-width: 100%;
+  vertical-align: top;
+}
+
+.gallery {
+  display: flex;
+  margin: 10px auto;
+  max-width: 600px;
+  position: relative;
+  padding-top: 66.6666666667%;
+}
+@media screen and (min-width: 600px) {
+  .gallery {
+    padding-top: 400px;
+  }
+}
+.gallery__img {
+  position: absolute;
+  top: 0;
+  left: 0;
+  opacity: 0;
+  transition: opacity 0.3s ease-in-out;
+}
+.gallery__thumb {
+  padding-top: 6px;
+  margin: 6px;
+  display: block;
+}
+.gallery__selector {
+  position: absolute;
+  opacity: 0;
+  visibility: hidden;
+}
+.gallery__selector:checked + .gallery__img {
+  opacity: 1;
+}
+.gallery__selector:checked ~ .gallery__thumb > img {
+  box-shadow: 0 0 0 3px #0be2f6;
+}