_layouts/default.html

<!doctype html>
<html lang="{{ site.lang | default: "en-US" }}">
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">

        {% seo %}

        <link rel="stylesheet" href="{{ '/assets/css/style.css?v=' | append: site.github.build_revision | relative_url }}">
        <script src="https://code.jquery.com/jquery-1.12.4.min.js" integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ=" crossorigin="anonymous"></script>
        <script src="{{ '/assets/js/respond.js' | relative_url }}"></script>

        <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">


        {% include head-custom.html %}
    </head>

    <body>
        <header>
            <div class="container">
                <a id="logo" href="{{ '/' | relative_url }}">
                    <!--<img src="{{ '/assets/images/logo.png' | relative_url }}" width="48" height="48">-->
                </a>
                
                <input type="checkbox" id="toggle">
                <label for="toggle" class="hamburger">
                    <span></span>
                    <span></span>
                    <span></span>
                </label>

                <nav class="main">
                    <a href="{{ '/' | relative_url }}">Home</a>
                    <a href="{{ site.github.repository_url }}">GitHub</a>
                </nav>

                <div class="centered">
                    <h1>{{ site.title | default: site.github.repository_name }}</h1>
                </div>
            </div>
        </header>

        <section class="grid tight blocky-code">
            <div id="sidebar">
                <nav>
                    <div class="toc mobile-hide">
                        <ul>
                            <!-- navigation -->
                        </ul>
                    </div>
                </nav>
            </div>

            <article>
                {{ content }}
            </article>
        </section>

        <footer class="grid light">
            <div class="container">
                <div class="col">
                    Project maintained by <a href="{{ site.github.owner_url }}">{{ site.github.owner_name }}</a>
                </div>
                <!--<div class="col text-right mobile-hide">
                    <a href="#">Back to top Δ</a>
                </div>-->
            </div>
        </footer>
    </body>
</html>