Sync styleguide 2026.05.18.1

docs/styleguide/styles/01-foundations.css

@@ -145,7 +145,6 @@
   --layout-preview-align-items: flex-start;
 
   /* Semantic pattern tokens: Portal header */
-  --surface-portal-background: var(--color-background-purple);
   --surface-portal-header: var(--color-darkblue);
   --surface-portal-header-tab: var(--color-midblue);
   --surface-portal-header-tab-active: var(--color-light-grey);
@@ -311,7 +310,6 @@
   --dimension-input-label-width: 9rem;
   --dimension-input-field-desktop-width: 400px;
   --dimension-input-field-max-width: 600px;
-  --dimension-email-body-max-width: 600px;
   --dimension-search-field-width: 15.3rem;
   --dimension-public-content-width: 100%;
   --dimension-layer-pulldown-panel: 40;