Rounded corners with Bootstrap.

Example:

Bootstrap 5 options include rounded-0 to rounded-5:

<div class="row">
	<div class="col">
		<div class="rounded-3 bg-light border border-dark p-3">
			<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</p>
		</div>
	</div>
</div>

Bootstrap 4 options include rounded-sm and rounded-lg:

<div class="row">
	<div class="col">
		<div class="rounded-lg bg-light border border-dark p-3">
			<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</p>
		</div>
	</div>
</div>