More website loading speed and code improvements

website/templates/article.html

@@ -6,7 +6,7 @@
 {%- set meta_image = page.extra.banner_png | safe -%}
 {%- set meta_article_type = true -%}
 {%- set meta_description = page.extra.summary | default(value = page.content | striptags | safe | linebreaksbr | replace(from = "<br>", to = " ") | replace(from = "  ", to = " ") | trim | truncate(length = 200)) -%}
-{%- set css = ["/article.css"] -%}
+{%- set css = ["/template/article.css", "/layout/reading-material.css"] -%}
 {%- endblock head -%}
 
 {%- block content -%}{%- set page = page | default(value = section) -%}