actuel-inactuel/site/snippets/cover.php

<?php
$isOpen = isset($isOpen) ? $isOpen : false;
?>

<header 
  class="page-cover"
>
  <div class="title-wrapper">
    <?= $slots->title() ?>
  </div>
  <?php if ($slots->text()): ?>  
    <div class="text-wrapper">
      <?= $slots->text() ?>
    </div>
  <?php endif ?>
</header>