{% if header_class is not defined %}{% set header_class="dark" %}{%endif%}
<div{% if image %} style="background: linear-gradient(to bottom, {% if header_class=="dark" %}rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7){% else %}rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.7){% endif %}), url({{image}}) no-repeat center center; background-size:cover"{% endif %}>
    <nav class="navbar navbar-expand-sm navbar-{{header_class}} container">
      <a href="/" class="navbar-brand">
        {% include 'logo.jinja2' %}
      </a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
      <div id="navbarSupportedContent" class="collapse navbar-collapse">
        <ul class="navbar-nav">
          {%- for item in menu %}
          <li class="nav-item dropdown">
            {%- if item.children %}
            <a role="button" class="nav-link dropdown-toggle cursor-default" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">{{item.title}}</a>
            <ul class="dropdown-menu">
              {%- if item.href %}
              <li>
                <a href="{{item.href|e}}" class="dropdown-item">{{item.title}}</a>
              </li>
              <li>
                <div class="dropdown-divider"></div>
              </li>
              {%- endif -%}
              {%- for subitem in item.children recursive -%}
              {%- if subitem.children %}
              <li class="dropright">
                <button class="dropdown-item dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">{{subitem.title}}</button>
                <ul class="dropdown-menu">
                  {%- if subitem.href %}
                  <li>
                    <a href="{{subitem.href|e}}" class="dropdown-item">{{subitem.title}}</a>
                  </li>
                  <li>
                    <div class="dropdown-divider"></div>
                  </li>
                  {%- endif -%}
                  {{ loop(subitem.children) }}
                </ul>
              {%- else -%}
              <li>
                <a href="{{subitem.href|e}}" class="dropdown-item">{{subitem.title}}</a>
                {%- endif -%}
              </li>
              {%- endfor %}
              </ul>
            {%- else %}
            <a href="{{item.href|e}}" class="nav-link">{{item.title}}</a>
            {%- endif %}
          </li>
          {%- endfor %}
        </ul>
      </div>
    </nav>
  <div class="jumbotron container text-{% if header_class=="dark" %}light{% else %}dark{% endif %} bg-transparent">
    <h1 class="page-title">{{title}}</h1>
    {%- if description %}
    <p class="page-lead">{{description}}</p>
    {% endif %}
  </div>
</div>