<%= form_for(@user) do |f| %>
  <%= f.label :email %>
  <%= f.text_field :email %>
  <br />
  <%= f.submit "Sign in" %>
<% end %>

<%= form_for(@user) do |f| %>
  <%= f.label :email %>
  <%= f.text_field :email %>
  <br />
  <%= f.submit "Sign in", :class => 'btn btn-primary' %>
<% end %>

Use bootstrap styling for consistency
Use bootstrap styling for consistency
