lair.moe/blueprints/root/templates/header.tmpl

<header>
	{%- if request.path != url_for('.index') %}
		<a href="{{ url_for('.index') }}">Lair</a>
	{%- else %}
		<div></div>
	{%- endif %}

	<div class="header-links">
		{%- for (l, t) in (
			('.us', _('about us')),
			('.host', _('about host'))
		)  %}
			{%- if url_for(l) == request.path %}
				<strong>{{ t }}</strong>
			{%- else %}
				<a href="{{ url_for(l) }}">{{ t }}</a>
			{%- endif %}
		{%- endfor %}
	</div>
</header>