A few style improvements

source/_nav_item.erb

@@ -14,7 +14,7 @@
                     <a href="<%= i.url %>"><%= i.data.title %></a>
                 <% else %>
                     <details>
-                    <summary><a href="<%= i.url %>"><%= i.data.title %></a></summary>
+                    <summary><a href="<%= i.url %>"><%= i.data.title %></a><i data-feather="chevron-left"></i></summary>
                     <%= partial :nav_item, :locals => {
                         :items => children,
                         :resources => resources
@@ -24,4 +24,4 @@
             </li>
         <% end %>
     </ul>
-<% end %>
+<% end %>

source/stylesheets/site.css.scss

@@ -18,7 +18,7 @@ h1, h2, h3 {
 header {
   grid-area: head;
   margin: 0;
-  padding: 20vh 20vw;
+  padding: 10vh 5vw;
   background: linear-gradient(0deg, $plumedark, $plume);
   color: white;
   font-size: 1.5em;
@@ -155,12 +155,31 @@ aside {
 
         & > a, & > details {
           display: block;
-          padding: 2em;
           border-bottom: none;
         }
 
+        & > a, & > details > summary {
+          margin: 2em;
+        }
+        
+        & > details > summary {
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+
+            svg {
+                display: block;
+                transition: transform 0.1s ease-in;
+            }
+        }
+
+        & > details[open] > summary svg {
+            transform: rotate(-90deg);
+        }
+
         & > a, & > details > summary > a {
           opacity: 0.6;
+          padding: 0px;
 
           &:hover {
             opacity: 1;
@@ -186,6 +205,10 @@ aside {
       padding: 1em;
       padding-left: 4em;
     }
+
+    details > ul > li > * {
+        padding-left: 1em;
+    }
   }
 }