Centering content

The page content text is not centering on an events page I have:
https://www.gobrightwing.com/kindness-forward

I looked at the style.css, the layout.css, the page-blank-events.php that is used as template and cannot find how to get that content aligned center.

I tried a fix found in the forum with:

<?php if(is_page(‘kindness forward’)) { ?>
<style> #main {width:100%;} </style>
<?php }; ?>

I tried using the name of the page as displayed in ‘all pages’ as well as the link with no luck.

Any suggestions how I can get the article text content to center on the page?

Much appreciated!