diff --git a/packages/app-shell/src/app-shell.js b/packages/app-shell/src/app-shell.js
index f35c7c1f0c6abc94d0f0fce06e2ce133f14d15d5..73b4f10bf60812c5536b0f0b8f64b0b9c74de616 100644
--- a/packages/app-shell/src/app-shell.js
+++ b/packages/app-shell/src/app-shell.js
@@ -573,20 +573,19 @@ export class AppShell extends ScopedElementsMixin(LitElement) {
                 }
 
                 aside {
-                    margin: 0 15px;
+                    margin: auto;
+                    padding: 0 0.5em;
                 }
 
                 aside h2.subtitle {
                     display: block;
-                    margin-bottom: 0.5em;
-                }
-
-                aside h2.subtitle:not(:last-child) {
-                    margin-bottom: 0.5em;
+                    border: 1px solid black;
+                    padding: 0.25em 0.5em;
                 }
 
                 aside .menu {
                     border: black 1px solid;
+                    border-top-width: 0;
                 }
 
                 .menu li {