app/views/devise/sessions/new.html.erb
<div class='log-in'>
<h2><%= t('forms.log_in') %></h2>
<%= form_for(resource, as: resource_name, url: session_path(resource_name)) do |f| %>
<%= devise_error_messages! %>
<div class='field'>
<%= f.email_field :email, autofocus: true, placeholder: t('forms.email') %>
</div>
<div class='field'>
<%= f.password_field :password, autocomplete: 'off', placeholder: t('forms.password') %>
</div>
<div class='field checkbox'>
<%= f.check_box :remember_me %>
<%= f.label :remember_me, t('forms.remember') %>
</div>
<div class='actions'>
<%= f.submit t('forms.log_in') %>
</div>
<% end %>
<%= render 'devise/shared/links' %>
</div>