<?php $this->css($this->assetModule('front/preview.css', 'widget')); ?>
<div class="card bg-danger">
    <div class="card-heading">
        <h1 class="card-title"><?php _e('Block Preview'); ?></h1>
    </div>
    <div class="card-text">
        <?php _e('Here is placeholder for module generated contents.'); ?>
    </div>
</div>