Adv

<div class="u-flex u-items-center u-justify-center">
  {% if format == 'box' %}
    <img decoding="async" referrerpolicy="no-referrer" src='https://via.placeholder.com/300x250/121212/FFFFFF?text=300x250' alt=''/>

  {% elif format == 'masthead' %}
    <img decoding="async" referrerpolicy="no-referrer" src='https://via.placeholder.com/1152x250/121212/FFFFFF?text=Masthead' alt=''/>

  {% elif format == 'leaderboard' %}
    <img decoding="async" referrerpolicy="no-referrer" src='https://via.placeholder.com/728x90/333333/FFFFFF?text=Leaderboard' alt=''/>  

  {% endif %}
</div>