[style] make page-card self contained

payments/templates/pages/payment-failed.html

@@ -16,6 +16,7 @@
 .hero-and-content {
 	background-color: #f5f7fa;
 }
+{% include "templates/styles/card_style.css" %}
 </style>
 
 {% endblock %}

payments/templates/pages/payment-success.html

@@ -13,9 +13,6 @@
 		{{ _("Continue") }}</a></div>
 </div>
 <style>
-.hero-and-content {
-	background-color: #f5f7fa;
-}
 {% include "templates/styles/card_style.css" %}
 </style>
 {% endblock %}