Unify page and post templates

templates/blog/post.html

-{% extends "base.html" %}
+{% extends "page.html" %}
 
-{% block main %}
-    <h1>{{ page.title }}</h1>
-    <div class="my-4">
-            <div class="section">
-                <div class="content container">
-                  <img src="{{ page.extra.depiction.image | safe }}" alt="{{ page.extra.depiction.alt }}" />
-                  {{ page.content }}
-                </div>
-            </div>
-    </div>
+{% block content %}
+  <div class="content">
+    <img src="{{ page.extra.depiction.image | safe }}" alt="{{ page.extra.depiction.alt }}" />
+    {{ page.content }}
+  </div>
 {% endblock %}

templates/page.html

 {% extends "base.html" %}
 
 {% block main %}
-    <div class="my-4">
-            <div class="section">
-               <div class="container">
-                <h1 class="title is-1">{{ page.title }}</h1>
-                <div class="content">
-                  {{ page.content | safe }}
-                </div>
-            </div>
-            </div>
+  <section class="section">
+    <div class="container">
+      <h1 class="title is-1">{{ page.title }}</h1>
+      {% block content %}
+        <div class="content">
+          {{ page.content | safe }}
+        </div>
+      {% endblock content %}
     </div>
+  </section>
 {% endblock %}