Sync styleguide 2026.05.18.1

docs/styleguide/patterns/public-page-patterns.html

@@ -192,6 +192,63 @@
         </div>
       </div>
 
+      <p class="sg-preview-label">Pattern: Newsletter Form</p>
+
+      <div class="sg-preview-area">
+        <div class="sg-content-group-box" data-component="content-group-box">
+          <article class="sg-card sg-card--content-card sg-card--content-card-dark sg-card--call-to-action-card sg-card--call-to-action-card--three-column" data-component="call-to-action-card" data-component-variant="three-column" aria-label="Newsletter Form">
+            <div class="sg-card-segment sg-card-segment--body sg-call-to-action-card__body" data-component-part="card-body">
+              <p class="sg-body sg-call-to-action-card__text">
+                Mit dem Newsletter immer über neue Inhalte informiert bleiben.
+              </p>
+
+              <div class="sg-labeled-input-row" data-component="single-line-input" data-component-state="inactive-selectable">
+                <input
+                  class="sg-interaction-element sg-input-single-line sg-input-single-line--inactive-selectable sg-form-inactive-selectable"
+                  type="email"
+                  placeholder="E-Mail-Adresse"
+                  aria-label="E-Mail-Adresse"
+                  pattern="[^\s@]+@[^\s@]+\.[^\s@]{2,}"
+                  required
+                >
+              </div>
+
+              <div class="sg-call-to-action-card__action">
+                <button class="sg-interaction-element sg-button sg-button--process sg-button--process-inactive" type="submit" data-component="button" data-component-variant="process" data-component-state="inactive" disabled aria-disabled="true">
+                  Prozess Button
+                </button>
+              </div>
+            </div>
+          </article>
+        </div>
+      </div>
+
+      <script>
+        (() => {
+          const newsletterForm = document.querySelector('.sg-card--call-to-action-card--three-column');
+          if (!newsletterForm) {
+            return;
+          }
+
+          const input = newsletterForm.querySelector('input[type="email"]');
+          const processButton = newsletterForm.querySelector('.sg-button--process');
+          if (!input || !processButton) {
+            return;
+          }
+
+          const updateProcessButtonState = () => {
+            const isActive = input.checkValidity();
+            processButton.disabled = !isActive;
+            processButton.setAttribute('aria-disabled', String(!isActive));
+            processButton.setAttribute('data-component-state', isActive ? 'active' : 'inactive');
+            processButton.classList.toggle('sg-button--process-inactive', !isActive);
+          };
+
+          input.addEventListener('input', updateProcessButtonState);
+          updateProcessButtonState();
+        })();
+      </script>
+
       <p class="sg-preview-label">pattern: Public Call to Action Box</p>
 
       <div class="sg-preview-area">