gin-3414963-Remove white background

dist/css/base/gin.css

@@ -916,6 +916,12 @@ details summary {
   margin: 0 0 var(--gin-spacing-xs) var(--gin-spacing-xs);
 }
 
+.views-exposed-form.views-exposed-form.views-exposed-form--preview {
+  background: none;
+  border-color: var(--gin-border-color);
+  border-radius: var(--gin-border-l);
+}
+
 [dir="ltr"] .views-exposed-form__item--preceding-actions.views-exposed-form__item--preceding-actions {
   margin-right: var(--gin-spacing-xs);
 }

styles/base/_views.scss

@@ -77,6 +77,13 @@
   }
 }
 
+.views-exposed-form.views-exposed-form.views-exposed-form--preview {
+  background: none;
+  border-color: var(--gin-border-color);
+  border-radius: var(--gin-border-l);
+
+}
+
 .views-exposed-form__item--preceding-actions.views-exposed-form__item--preceding-actions {
   margin-right: var(--gin-spacing-xs);
 }