{% macro info(article, what="h1") %}
<div class="art-info">
    <a href="{{ article.url }}"><{{what}} class="art">{{ article.title }}</{{what}}></a>
    <span class="art-date">{{ article.author }} on {{ article.datetime.astimezone().date() }}</span>
</div>
{% endmacro %}

{% macro nav(article) %}
<div class="art-nav">
    {% if article.older -%}
    <a href="{{ article.older.url }}">previous article</a>
    {%- else -%}
    <span></span>
    {%- endif -%}
    <a href="{{ url_for("archive") }}">view archive</a>
    {%- if article.newer %}
    <a href="{{ article.newer.url }}">next article</a>
    {%- else %}
    <span></span>
    {%- endif %}
</div>
{% endmacro %}