_includes/head.html

<head>
  {%- if include.homepage -%}
  <title>{{ page.title }}</title>
  {%- else -%}
  {%- if page.section -%}
  <title>{{ page.title }} - {{ page.section }} - Open Rails</title>
  {%- else -%}
  <title>{{ page.title }} - Open Rails</title>
  {%- endif -%}
  {%- endif -%}
  {%- seo title=false -%}
  {%- feed_meta -%}
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  {%- if jekyll.environment == 'production' and site.google_analytics -%}
    {%- include google-analytics.html -%}
  {%- endif -%}
  <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" type="text/css">
  <link rel="stylesheet" href="{{ "/assets/template.css" | relative_url }}">
  {%- if include.homepage -%}
  <link rel="stylesheet" href="{{ "/assets/homepage.css" | relative_url }}">
  {%- endif -%}
  {%- if page.use_iframe -%}
  <link rel="stylesheet" href="{{ "/assets/iframe.css" | relative_url }}" >
  {%- endif -%}
  {%- if page.content_explorer -%}
  <link rel="stylesheet" href="{{ "/assets/content-explorer.css" | relative_url }}" >
  {%- endif -%}
</head>