dupeguru/_includes/header.html

<header class="site-header" role="banner">

    <div class="wrapper">
      {%- assign default_paths = site.pages | map: "path" -%}
      {%- assign page_paths = site.header_pages | default: default_paths -%}
      <a class="site-title" rel="author" href="{{ "/" | relative_url }}">{{ site.title | escape }}</a>
  
      {%- if page_paths -%}
        <nav class="site-nav">
          <input type="checkbox" id="nav-trigger" class="nav-trigger" />
          <label for="nav-trigger">
            <span class="menu-icon">
              <svg viewBox="0 0 18 15" width="18px" height="15px">
                <path fill="#424242" d="M18,1.484c0,0.82-0.665,1.484-1.484,1.484H1.484C0.665,2.969,0,2.304,0,1.484l0,0C0,0.665,0.665,0,1.484,0 h15.031C17.335,0,18,0.665,18,1.484L18,1.484z"/>
                <path fill="#424242" d="M18,7.516C18,8.335,17.335,9,16.516,9H1.484C0.665,9,0,8.335,0,7.516l0,0c0-0.82,0.665-1.484,1.484-1.484 h15.031C17.335,6.031,18,6.696,18,7.516L18,7.516z"/>
                <path fill="#424242" d="M18,13.516C18,14.335,17.335,15,16.516,15H1.484C0.665,15,0,14.335,0,13.516l0,0 c0-0.82,0.665-1.484,1.484-1.484h15.031C17.335,12.031,18,12.696,18,13.516L18,13.516z"/>
              </svg>
            </span>
          </label>
  
          <div class="trigger">
            {%- for path in page_paths -%}
              {%- assign my_page = site.pages | where: "path", path | first -%}
              {%- if my_page.title -%}
              <a class="page-link" href="{{ my_page.url | relative_url }}">{{ my_page.title | escape }}</a>
              {%- endif -%}
            {% endfor -%}
            {%- if site.data.externallinks -%}
              {%- for link in site.data.externallinks -%}
              <a class="page-link" href="{{ link.url }}">{{ link.title | escape }}</a>
              {%- endfor -%}
            {%- endif -%}
          </div>
        </nav>
      {%- endif -%}
    </div>
  </header>