Collapse gallery highlights by default

_sass/_layout.scss

@@ -297,6 +297,8 @@ hr {
 .art .side-anchors {
   max-width: $content-width - ($spacing-unit * 4);
   margin: 1rem auto;
+  margin-top: 0;
+  margin-bottom: 3rem;
   padding: 0 1rem;
 }
 

art.html

@@ -5,7 +5,7 @@ wide_gallery: true
 
 <div class="home art">
   <div class='side-anchors'>
-    <details open>
+    <details>
       <summary>Highlights</summary>
       <ul>
         {% for post in site.art reversed %}