refs #22197 [finc] fix background colour for header in lists

* better nesting - no css changes

themes/finc/scss/components/_headings.scss

@@ -47,8 +47,12 @@ h2 {
       }
     }
   }
-}
 
+  //// Search results
+  .result-body & {
+    margin: 0;
+  }
+}
 
 // *****************************************************************
 // ************ h3 *************************************************

themes/finc/scss/components/_result-list.scss

@@ -7,6 +7,12 @@
 // ************ Media container ************************************
 // *****************************************************************
 
+// re-define header for records in list of result, #19396
+header {
+  background-color: transparent;
+  width: auto;
+}
+
 .record,
 .result {
   // make sure that results items use max. available space on XS