bootstrap-8.x-3.23/templates/system/maintenance-page.html.twig

{#
/**
 * @file
 * Theme override to display a single Drupal page while offline.
 *
 * All available variables are mirrored in page.html.twig.
 * Some may be blank but they are provided for consistency.
 *
 * @see template_preprocess_maintenance_page()
 */
#}
{% set container = theme.settings.fluid_container ? 'container-fluid' : 'container' %}
{% set navbar_attributes = create_attribute() %}
{# Navbar #}
{% block navbar %}
{%
  set navbar_classes = [
    'navbar',
    theme.settings.navbar_inverse ? 'navbar-inverse' : 'navbar-default',
    theme.settings.navbar_position ? 'navbar-' ~ theme.settings.navbar_position|clean_class : container,
  ]
%}
<header {{ navbar_attributes.addClass(navbar_classes) }} id="navbar" role="banner">
  <div class="{{ container }}">
    <div class="row">
      <section class="col-sm-12">
        <div class="navbar-header">
          {% if logo %}
            <a class="logo navbar-btn pull-left" href="{{ path('<front>') }}" title="{{ 'Home'|t }}" rel="home">
              <img src="{{ logo }}" alt="{{ 'Home'|t }}" />
            </a>
          {% endif %}

          {% if site_name or site_slogan %}
              {% if site_name %}
                 <a class="name navbar-brand" href="{{ path('<front>') }}" title="{{ 'Home'|t }}" rel="home">{{ site_name }}</a>
              {% endif %}
              {% if site_slogan %}
                  <p class="navbar-text">{{ site_slogan }}</p>
              {% endif %}
          {% endif %}
        </div>
      </section>
    </div>
  </div>
</header>
{% endblock %}

{# Main #}
<main role="main" class="main-container {{ container }}">
  <div class="row">
    <section class="col-sm-12">
      {% if title %}
        <h1>{{ title }}</h1>
      {% endif %}

      {# Content #}
      {% block content %}
        <a id="main-content"></a>
        {{ page.content }}
      {% endblock %}
    </section>
  </div>
</main>