big overhaul

templates/404.html

@@ -0,0 +1,9 @@
+{% extends "base.html" %}
+
+{% block content %}
+<article class="center">
+    <h1>404 - Not Found</h1>
+    <p>The page you're looking for doesn't exist.</p>
+    <a href="/" class="no-style">← Return home</a>
+</article>
+{% endblock %}