/*
 * Facebook plugin iframes stay a light card in dark mode (the plugin cannot be
 * themed). The theme's dark.css sets --dnews-fb-ring and --dnews-fb-radius so
 * the card gets a hairline and rounded corners against the dark page; in light
 * mode neither is set and the iframe is unchanged.
 */
.dnews-fb__frame {
	border-radius: var(--dnews-fb-radius, 0);
	box-shadow: var(--dnews-fb-ring, none);
}