app/views/layouts/application.html.erb
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title><%= content_for?(:title) ? yield(:title) : t('site.title') %></title>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %>
<%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
<%= javascript_include_tag 'modernizr' %>
<%= csrf_meta_tag %>
<%= piwik_tracking_tag %>
</head>
<body>
<section class="off-canvas-wrap" data-offcanvas>
<section class="inner-wrap">
<%= render 'layouts/sidemenu' %>
<section class="main-content" role="page">
<header>
<%= render 'layouts/header' %>
</header>
<%= yield %>
<footer>
<%= render 'layouts/footer' %>
</footer>
</section>
</section>
</section>
</body>
</html>