ul.banners {
	list-style: none;
	margin: 1em 0;
	padding: 0;
	display: grid;
	grid-template-columns: repeat( var( --bn-columnas, 1 ), 1fr );
	gap: 16px;
	align-items: center;
	justify-items: center;
}

li.banner {
	margin: 0;
	padding: 0;
}

li.banner img {
	border: 1px solid #aaa;
	border-radius: 10px;
}

@media ( max-width: 600px ) {
	ul.banners {
		grid-template-columns: 1fr;
	}
}