Error maintenance

{% extends "brickwork/shell/centred.html" %}
{% comment %}
A planned-maintenance / site-unavailable screen.

COPY THIS FILE into your project and edit it. It is not on the template loader
path, so you cannot extend it (ADR-056).

This one extends the CENTRED shell, not the app shell: maintenance is a
deliberate interruption of the whole product, so it drops the sidebar and
topbar rather than letting the user navigate into pages that cannot answer.

Name exactly what is down, until when, and where to look for live updates.
"We'll be back soon" is not a status page, it is a shrug. The example below
states the ETA in words a reader can act on, and offers a status page plus a
support contact that still works while the app itself does not.

No JS is involved: both actions are ordinary links. Keep a real URL behind
any "check status" control so the page still works without JavaScript.

States: none: a static page, no open/closed or hover-driven state beyond
  the composed _alert.html and bw_button controls' own states.
Accessibility: inherits shell/centred.html's skip link, lang/dir/theme
  attributes and <main id="bw-main" tabindex="-1">; the warning alert
  names the outage and the ETA in words (role="alert"), never colour
  alone. Covered by the archetype harness's full gate sweep (render, axe
  WCAG 2.2 AA, no horizontal overflow, light/dark distinctness, skip-link
  first-tab-stop with JS disabled) at every W0.1 breakpoint, both themes.
Responsive: no breakpoint switch of its own; inherits shell/centred.html's
  fluid, no-breakpoint centred panel.
{% endcomment %}
{% load brickwork_components %}

{% block page_title %}Planned maintenance - Northwind{% endblock %}

{% block content %}
<div class="bw-section-stack">

  {% include "brickwork/components/_alert.html" with variant="warning" title="Northwind is down for planned maintenance" message="The ledger migration finishes at about 15:00 BST on Friday 12 September 2026. Invoices, reminders and the customer portal are unavailable until then." %}

  {% comment %}
  Status is a link to a page that stays up while this app is down (often a
  third-party status host). Support is a mailto or a helpdesk URL that does
  not depend on the Northwind app process. Neither is a POST: there is
  nothing to submit on a maintenance screen.
  {% endcomment %}
  <div class="bw-form__actions">
    {% bw_button "View status page" variant="primary" href="https://status.northwind.example/" %}
    {% bw_button "Contact support" variant="ghost" href="mailto:support@northwind.example" %}
  </div>

</div>
{% endblock %}