diff --git a/_includes/seo.html b/_includes/seo.html
new file mode 100644
index 0000000..97d1c61
--- /dev/null
+++ b/_includes/seo.html
@@ -0,0 +1,155 @@
+
+{%- if site.url -%}
+ {%- assign seo_url = site.url | append: site.baseurl -%}
+{%- endif -%}
+{%- assign seo_url = seo_url | default: site.github.url -%}
+
+{% assign title_separator = site.title_separator | default: '-' | replace: '|', '|' %}
+
+{%- if page.title -%}
+ {%- assign seo_title = page.title | append: " " | append: title_separator | append: " " | append: site.title -%}
+{%- endif -%}
+
+{%- if seo_title -%}
+ {%- assign seo_title = seo_title | markdownify | strip_html | strip_newlines | escape_once -%}
+{%- endif -%}
+
+{% if page.canonical_url %}
+ {%- assign canonical_url = page.canonical_url %}
+{% else %}
+ {%- assign canonical_url = page.url | replace: "index.html", "" | absolute_url %}
+{% endif %}
+
+{%- assign seo_description = page.description | default: page.excerpt | default: site.description -%}
+{%- if seo_description -%}
+ {%- assign seo_description = seo_description | markdownify | strip_html | newline_to_br | strip_newlines | replace: '
', ' ' | escape_once | strip -%}
+{%- endif -%}
+
+{%- assign author = page.author | default: page.authors[0] | default: site.author -%}
+{%- assign author = site.data.authors[author] | default: author -%}
+
+{%- if author.twitter -%}
+ {%- assign author_twitter = author.twitter | replace: "@", "" -%}
+{%- endif -%}
+
+{%- assign page_large_image = site.og_image | default: page.header.og_image | default: page.header.overlay_image | default: page.header.image | absolute_url -%}
+{%- assign page_large_image = page_large_image | escape -%}
+
+{%- assign page_teaser_image = page.header.teaser | default: site.og_image | absolute_url -%}
+{%- assign page_teaser_image = page_teaser_image | escape -%}
+
+{%- assign site_og_image = site.og_image | absolute_url -%}
+{%- assign site_og_image = site_og_image | escape -%}
+
+{%- if page.date -%}
+ {%- assign og_type = "article" -%}
+{%- else -%}
+ {%- assign og_type = "website" -%}
+{%- endif -%}
+
+{{ seo_title | default: site.title }}{% if paginator %}{% unless paginator.page == 1 %} {{ title_separator }} {{ site.data.ui-text[site.locale].page | default: "Page" }} {{ paginator.page }}{% endunless %}{% endif %}
+
+
+{% if author.name %}
+
+ {% if og_type == "article" %}
+
+ {% endif %}
+{% endif %}
+
+
+
+
+
+
+
+{% if seo_description %}
+
+{% endif %}
+
+{% if page_large_image %}
+
+{% elsif page_teaser_image %}
+
+{% endif %}
+
+{% if site.twitter.username %}
+
+
+
+
+
+ {% if page_large_image %}
+
+
+ {% else %}
+
+ {% if page_teaser_image %}
+
+ {% endif %}
+ {% endif %}
+
+ {% if author_twitter %}
+
+ {% endif %}
+{% endif %}
+
+{% if page.date %}
+
+{% endif %}
+
+{% if og_type == "article" and page.last_modified_at %}
+
+{% endif %}
+
+{% if site.facebook %}
+ {% if site.facebook.publisher %}
+
+ {% endif %}
+
+ {% if site.facebook.app_id %}
+
+ {% endif %}
+{% endif %}
+
+
+
+{% if paginator.previous_page %}
+
+{% endif %}
+{% if paginator.next_page %}
+
+{% endif %}
+
+
+
+{% if site.google_site_verification %}
+
+{% endif %}
+{% if site.bing_site_verification %}
+
+{% endif %}
+{% if site.alexa_site_verification %}
+
+{% endif %}
+{% if site.yandex_site_verification %}
+
+{% endif %}
+{% if site.naver_site_verification %}
+
+{% endif %}
+