qdouze-wordpress-theme/functions.php

<?php 
/* functions.php
 *
 * All the function of Quarante-Douze
 *
 */
 

/* 1. Sidebar support */

  if ( function_exists('register_sidebar') )
    register_sidebar(array(
        'before_widget' => '<section id="%1$s" class="widget %2$s card card-secondary">',
        'after_widget' => '</section>',
        'before_title' => '<h1 class="section card-header">',
        'after_title' => '</h1>',
    ));