{# Base navigation without dark mode toggle #}
<header>
    <nav>
        {# Brand/Logo #}
        <a href="{{ index_url|default:'/' }}">
            {% block site_title %}{{ site_header|default:"Django Admin" }}{% endblock %}
        </a>

        {# Navigation Menu #}
        <menu>
            {% block nav_links %}
            <li><a href="{{ index_url|default:'/' }}">Dashboard</a></li>
            {% endblock %}
        </menu>

        {# User Info #}
        {% if user.is_authenticated %}
        <div>
            <span>{{ user.get_username }}</span>
        </div>
        {% endif %}

        {# Mobile Menu Toggle #}
        <button type="button" id="mobile-menu-toggle" aria-label="Toggle menu">
            <span></span>
        </button>
    </nav>

    {# Mobile Menu #}
    <nav id="mobile-menu" hidden>
        <menu>
            {% block mobile_nav_links %}
            <li><a href="{{ index_url|default:'/' }}">Dashboard</a></li>
            {% endblock %}
        </menu>
    </nav>
</header>