Create an initial style for 3rd edition with dark mode support

blog/templates/edition-3/extra.html

@@ -0,0 +1,22 @@
+{% extends "edition-3/base.html" %}
+
+{% import "macros.html" as macros %}
+
+{% block title %}{{ page.title }} | {{ config.title }}{% endblock title %}
+
+{% block description -%}
+{{ page.summary | safe | striptags | truncate(length=150) }}
+{%- endblock description %}
+
+{% block main %}
+    <h1>{{ page.title }}</h1>
+    {{ page.content | safe }}
+{% endblock main %}
+
+{% block after_main %}
+    <hr>
+    <section>
+        <h2>Comments</h2>
+        {{ macros::utterances() }}
+    </section>
+{% endblock after_main %}