update: added background image in css file

widget_group_17/forum/static/forum/style.css

 p{
     color: white;
     font-weight: bold;
-    font-family: Helvetica;
+    font-family: Trebuchet MS;
     font-size:25px;
 }
 h1 {
   position: sticky;
   text-align: left;
-  color: white;
+  color: gainsboro;
   font-size: 55px;
-  font-family: Helvetica;
+  font-family: Trebuchet MS;
+}
+h2 {
+    position: sticky;
+    text-align: left;
+    color: #f8f8ff;
+    font-size: 20px;
+    font-family: Trebuchet MS;
 }
 body {
-    background-image: url("/static/bg.png");
+    background-image: url("/static/forum/peppa_bg.jpg");
     background-repeat: no-repeat;
     background-size: cover;
     background-position: center;
     background-attachment: fixed;
-    font-family: Helvetica;
+    font-family: Trebuchet MS;
 }
-a{
+a {
     color: white;
-    font-family: Helvetica;
+    font-family: Trebuchet MS;
     font-weight: bold;
 }
 ol {
     font-size:35px;
-    font-family: Helvetica;
+    font-family: Trebuchet MS;
     color:white;
     font-weight: bold;
      }

widget_group_17/forum/templates/forum/post_add.html

-{% extends "base.html" %}
+{% extends "forum/base.html" %}
 
 {% block page-title %}New Forum Post{% endblock %}