Center Highlights independently of the wide photo grid

_sass/_layout.scss

@@ -294,6 +294,12 @@ hr {
   }
 }
 
+.art .side-anchors {
+  max-width: $content-width - ($spacing-unit * 4);
+  margin: 1rem auto;
+  padding: 0 1rem;
+}
+
 .notice {
   background-color: #80c4d5;
   padding: 1rem 2rem;