Small highlight when back to album

theme/static/css/main.css

@@ -120,3 +120,18 @@ main ul .thumbnail a {
   color: inherit;
   text-decoration: none;
 }
+
+img:target {
+  animation-name: highlight;
+  animation-duration: 3s;
+}
+
+@keyframes highlight {
+  from {
+    border: #ffffa0 solid 5px
+  }
+
+  to {
+    border: #ffffa000 solid 5px;
+  }
+}