<div class="container">
  <div class="row">
    <div class="col-sm-6 col-md-4 col-md-offset-4">
      <h2 class="text-center">Log In</h2>

      <%= form_tag sessions_path, :class => "login" do %>

        <input type="text" id="username" class="form-control" placeholder="Email" required autofocus>
        <input type="password" id="password" class="form-control" placeholder="Password" required>
        <button class="btn btn-lg btn-primary btn-block" type="submit">Log in</button>
      <% end %>
      
    </div>
  </div>
</div>

<div class="container">
  <div class="row">
    <div class="col-sm-6 col-md-4 col-md-offset-4">
      <h2 class="text-center">Log In</h2>

      <%= form_tag sessions_path, :class => "login" do %>

        <input type="text" id="username" class="form-control" placeholder="Username" required autofocus>
        <input type="password" id="password" class="form-control" placeholder="Password" required>
        <button class="btn btn-lg btn-primary btn-block" type="submit">Log in</button>
      <% end %>
      
    </div>
  </div>
</div>

Improve styling on login page
Improve styling on login page
