<%= form_for @petition, url: admin_petition_petition_details_path(@petition), method: :patch do |f| %>

  <h2>Edit petition</h2>

  <%= form_row for: [f.object, :action] do %>
    <%= f.label :action, class: 'form-label' %>
    <%= error_messages_for_field @petition, :action %>
    <%= f.text_area :action, tabindex: increment, rows: 3, maxlength: 80, class: 'form-control' %>
  <% end %>

  <%= form_row for: [f.object, :background] do %>
    <%= f.label :background, class: 'form-label' %>
    <%= error_messages_for_field @petition, :background %>
    <%= f.text_area :background, tabindex: increment, rows: 5, class: 'form-control' %>
  <% end %>

  <%= form_row for: [f.object, :additional_details] do %>
    <%= f.label :additional_details, class: 'form-label' %>
    <%= error_messages_for_field @petition, :additional_details %>
    <%= f.text_area :additional_details, tabindex: increment, rows: 7, class: 'form-control' %>
  <% end %>

  <%= form_row do %>
    <%= f.submit 'Save' %>
  <% end %>

  <%= link_to 'Cancel', admin_petition_path(@petition) %>

<% end %>

<!-- Back to X list -->

<div class="grid-row">

  <div class="column-two-thirds extra-gutter">
    <h2>Edit petition</h2>
    <%= form_for @petition, url: admin_petition_petition_details_path(@petition), method: :patch do |f| %>

      <%= form_row for: [f.object, :action] do %>
        <%= f.label :action, class: 'form-label' %>
        <%= error_messages_for_field @petition, :action %>
        <%= f.text_area :action, tabindex: increment, rows: 3, maxlength: 80, class: 'form-control' %>
      <% end %>

      <%= form_row for: [f.object, :background] do %>
        <%= f.label :background, class: 'form-label' %>
        <%= error_messages_for_field @petition, :background %>
        <%= f.text_area :background, tabindex: increment, rows: 5, class: 'form-control' %>
      <% end %>

      <%= form_row for: [f.object, :additional_details] do %>
        <%= f.label :additional_details, class: 'form-label' %>
        <%= error_messages_for_field @petition, :additional_details %>
        <%= f.text_area :additional_details, tabindex: increment, rows: 7, class: 'form-control' %>
      <% end %>

      <%= form_row do %>
        <%= f.submit 'Save', class: 'button' %>
      <% end %>

      <%= link_to 'Cancel', admin_petition_path(@petition) %>

    <% end %>
  </div>

  <div class="admin-petition-meta column-third">
    <%= render 'admin/petitions/petition_details' %>
  </div>

</div>

Use the column display for petition details admin
Use the column display for petition details admin

It's not a "petition action" that lives in the nav element, so we don't show the petition_actions nav (it could get confusing), but it's nice to show more of the details in the sidebar.
