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>List Share App</title>
<%= stylesheet_link_tag "application" %>
<%= javascript_include_tag "vendor/modernizr" %>
<%= javascript_include_tag "application" %>
<%= csrf_meta_tags %>
</head>
<body>
<main role='main'>
<nav class='top-bar' data-topbar role='navigation'>
<ul class="title-area">
<li class="name">
<h1><a href="/">List Share App</a></h1>
</li>
<li class="toggle-topbar menu-icon"><a href="#"><span></span></a></li>
</ul>
<section class="top-bar-section">
<ul class='right'>
<% if user_signed_in? %>
<li><%= link_to 'Profile', user_path(current_user) %></li>
<li><%= link_to 'Sign out', destroy_user_session_path, method: :delete %></li>
<% else %>
<li><%= link_to 'Sign Up', new_user_registration_path %></li>
<li><%= link_to 'Sign In', new_user_session_path %></li>
<% end %>
</ul>
</section>
</nav>
<%= render 'layouts/messages' %>
<%= yield %>
</main>
</body>
</html>