Move form section background to card

styles/25-patterns-form-sections.css

@@ -10,6 +10,7 @@
   display: flex;
   flex-direction: column;
   width: 100%;
+  background: var(--surface-form-preview);
   min-width: min(
     100%,
     calc(var(--layout-form-sections-label-column-width) + var(--spacing-small) + var(--layout-input-field-desktop-width))
@@ -27,7 +28,6 @@
 }
 
 .sg-form-sections-card__body {
-  background: var(--surface-form-preview);
   padding: 0;
 }
 
@@ -36,7 +36,6 @@
 }
 
 .sg-form-sections-card__actions-segment {
-  background: var(--surface-form-preview);
   margin-top: var(--spacing-large);
   padding: 0;
 }