{% if not doc.title %}
{% set meta_title = none %}
{% if site.page_title %}
{% set meta_title = site.page_title %}
{% elif site.title %}
{% set meta_title = site.title %}
{% endif %}
{% if meta_title %}
{% if site.title and meta_title != site.title %}
<title>{{ meta_title }} | {{ site.title }}</title>
{% else %}
<title>{{ meta_title }}</title>
{% endif %}
{% endif %}
{% endif %}
{% if site.description %}
<meta name="description" content="{{ site.description }}">
<meta property="og:description" content="{{ site.description }}">
{% endif %}
{% if site.title %}
<meta property="og:site_name" content="{{ site.title }}">
{% endif %}
{% if doc.title %}
{% set meta_title = doc.title %}
{% elif site.page_title %}
{% set meta_title = site.page_title %}
{% elif site.title %}
{% set meta_title = site.title %}
{% endif %}
{% if meta_title %}
{% if site.title and meta_title != site.title %}
<meta property="og:title" content="{{ meta_title }} | {{ site.title }}">
{% else %}
<meta property="og:title" content="{{ meta_title }}">
{% endif %}
{% endif %}
{% if site.page_url %}
<link rel="canonical" href="{{ site.page_url }}">
<meta property="og:url" content="{{ site.page_url }}">
{% endif %}
{% if site.favicon %}
<link rel="icon" href="{{ site.favicon }}">
{% endif %}
{% for translation in site.translations %}
<link rel="alternate" hreflang="{{ translation.code }}" href="{{ translation.href }}">
{% endfor %}