Wrap public portal links in basic card

patterns/portal-header.html

@@ -69,7 +69,7 @@
       </p>
 
       <p class="sg-table-label sg-text-on-dark">
-        Mobile: Login/Registrieren und Portaltitel in der ersten Zeile; Hauptmenüpunkte in einer eigenen Zeile darunter.
+        Mobile: Login/Registrieren und Portaltitel in der ersten Zeile; Hauptmenüpunkte in einer eigenen Basic Card darunter.
       </p>
 
       <article class="sg-portal-header-pattern-variant" aria-label="Public Portal Header ohne Options Row">
@@ -92,7 +92,11 @@
 
           <div class="sg-portal-header__main" data-pattern-part="portal-header-main">
             <p class="sg-portal-header__brand sg-brand-title" data-pattern-part="portal-header-brand">Portalname</p>
+          </div>
+        </header>
 
+        <article class="sg-card sg-portal-header-pattern-variant__links-card" data-component="basic-card" aria-label="Hauptnavigation">
+          <div class="sg-card-segment sg-card-segment--body sg-card-segment--gray" data-component-part="card-body">
             <nav class="sg-portal-header__tabs" aria-label="Hauptnavigation" data-pattern-part="portal-header-navigation">
               <a class="sg-hyperlink" href="#" aria-current="page" data-component="hyperlink">Inhalt 1</a>
               <a class="sg-hyperlink" href="#" data-component="hyperlink">Inhalt 2</a>
@@ -100,7 +104,7 @@
               <a class="sg-hyperlink" href="#" data-component="hyperlink">Inhalt 4</a>
             </nav>
           </div>
-        </header>
+        </article>
 
         <p class="sg-table-label sg-portal-header-pattern-variant__next-element sg-text-on-dark">
           Nächstes Element (Abstand nach unten: spacing-large)