app/views/devise/sessions/new.html.erb
<div class="row">
<div class="col-xs-12 col-sm-8 col-md-6 col-lg-6 col-sm-offset-2 col-md-offset-3 col-lg-offset-3">
<div class="panel" id="login-box">
<div class="panel-body">
<%= render 'layouts/messages' %>
<%= show_error_messages!(resource) %>
<%= form_for resource, url: session_path(resource_name) do |f| %>
<div class="form-group">
<div class="input-group">
<span class="input-group-addon">
<%= glyph(:envelope) %>
</span>
<%= f.text_field :email, required: false, autofocus: true, placeholder: t("application.login_form.email"), class: "form-control input-lg" %>
</div>
</div>
<div class="form-group">
<div class="input-group">
<span class="input-group-addon">
<%= glyph(:lock) %>
</span>
<%= f.password_field :password, required: false, autofocus: true, placeholder: t("application.login_form.password"), class: "form-control input-lg" %>
<span class="input-group-addon show-password">
<%= glyph(:eye_close) %>
</span>
</div>
</div>
<div class="form-group" id="remember-me-wrapper">
<div class="row">
<div class="col-xs-12">
<div class="checkbox">
<%= f.label :remember_me do |nada| %>
<%= f.check_box :remember_me %>
<%= t("application.login_form.remember_check") %>
<% end %>
</div>
</div>
</div>
</div>
<div class="form-group">
<div class="row">
<div class="col-xs-12">
<%= f.submit t("application.login_form.button"), class: "btn btn-primary btn-lg col-xs-12" %>
</div>
</div>
</div>
<div class="text-center"><%= t('global.or').upcase %></div>
<div class="form-group">
<div class="row">
<div class="col-xs-12">
<%= link_to t('devise.registrations.new.sign_up'), signup_users_path, class: "btn btn-primary btn-lg col-xs-12" %>
</div>
</div>
</div>
<% end %>
</div>
<div class="panel-footer">
<%= render "devise/shared/links" %>
</div>
</div>
</div>
</div>