Search box visible on small screens; year column on one line

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

layouts/_partials/header.html

@@ -11,7 +11,6 @@
         <ul class="menu__dropdown">
           {{ range site.Menus.main }}<li><a href="{{ .URL }}">{{ .Name }}</a></li>{{ end }}
           {{ with site.Params.forum.url }}<li><a href="{{ . }}">Forum</a></li>{{ end }}
-          <li><a href="{{ "search/" | relURL }}">Search</a></li>
         </ul>
       </li>
     </ul>
@@ -22,12 +21,10 @@
       <li><a href="{{ .URL }}"{{ if or ($current.IsMenuCurrent .Menu .) ($current.HasMenuCurrent .Menu .) (eq $current.Section .Page.Section) }} class="active" aria-current="true"{{ end }}>{{ .Name }}</a></li>
       {{ end }}
       {{ with site.Params.forum.url }}<li><a href="{{ . }}">Forum</a></li>{{ end }}
-      <li class="spacer"></li>
-      <li>
-        <form class="search" role="search" action="{{ "search/" | relURL }}" method="get">
-          <input type="search" name="q" placeholder="search…" aria-label="Search the site">
-        </form>
-      </li>
     </ul>
+    {{/* outside the list: the list is hidden on small screens, the search box is not */}}
+    <form class="search" role="search" action="{{ "search/" | relURL }}" method="get">
+      <input type="search" name="q" placeholder="search…" aria-label="Search the site">
+    </form>
   </nav>
 </header>