app/views/devise/sessions/new.html.erb
<div class="row>">
<div class="column small-12">
<h2>Log in</h2>
</div>
</div>
<%= form_for(resource, as: resource_name, url: session_path(resource_name)) do |f| %>
<div class="row">
<div class="column small-12 medium-4">
<%= f.label :email do %>
Email
<%= f.email_field :email, autofocus: true %>
<% end %>
</div>
<div class="columns small-12 large-4">
<%= f.label :password do %>
Password
<%= f.password_field :password, autocomplete: "off" %>
<% end %>
</div>
<div class="columns small-12 large-4">
<% if devise_mapping.rememberable? -%>
<%= f.check_box :remember_me %>
<%= f.label :remember_me %>
<% end -%>
<div class="actions">
<%= f.submit "Log in" %>
</div>
</div>
</div>
<% end %>
<%= render "devise/shared/links" %>