Source: dist/css/acc_boot.css, line 11260
Example
Default styling
content
aside
<section id="introduction" item-label="section" class="grid columns_1 columns_5:lg gap_5:lg gap_4">
<div item-label="content" class="col-start_start col-end_n3:lg col-end_end reading-typography font-size_up" style="--custom-font-size-modifier: 1;">content</div>
<div item-label="sidebar-primary" class="col-start_start col-start_n3:lg col-end_end wrapper-container">aside</div>
</section>