diff --git a/themes/bs_bootstrap/sass/components/partials/_webform.scss b/themes/bs_bootstrap/sass/components/partials/_webform.scss
index a8d998e..abfc65e 100644
--- a/themes/bs_bootstrap/sass/components/partials/_webform.scss
+++ b/themes/bs_bootstrap/sass/components/partials/_webform.scss
@@ -25,15 +25,13 @@ fieldset {
     margin-bottom: 0;
   }
 
-  // For the last child in a fieldset we do need to reset bottom margin becase
+  // For the last child in a fieldset we do need to reset bottom margin because
   // fieldset is disabling vertical margin collapsing.
-  .webform-flexbox {
-    &:last-child {
-      .webform-flex--container {
-        .form-group {
-          margin-bottom: 0;
-        }
-      }
-    }
+  .webform-flexbox:last-child {
+    // We will apply negative margin to webform-flexbox because it's very hard
+    // to control form-groups margin in this context - we would need to reset
+    // only the last one for small screens but that creates problem for bigger
+    // screens.
+    margin-bottom: -$form-group-margin-bottom;
   }
 }