app/views/devise/sessions/new.html.haml
.col-sm-6.col-sm-offset-3.col-md-4.col-md-offset-4
= bootstrap_form_for(resource, url: session_path(resource_name)) do |f|
%fieldset
%legend
%h2 Log In
= f.email_field :email, autofocus: true
= f.password_field :password, autocomplete: "off"
- if devise_mapping.rememberable?
= f.check_box :remember_me
.actions
= f.submit "Log in"
= render "devise/shared/links"