Wikipedia:FAQ/framework/styles.css

.faq-header {
	border-bottom:0px;
	border: 1px solid #a3b0bf;
	text-align:center;
	padding:4px 0.17em;
	margin-bottom: 0.6em; 
	color: var(--color-emphasized, #101418);
	font-size:150%;
	font-weight:bold;
	background: #cedff2;
}

.faq {
	border: solid 2px #A3B1BF;
	background: #F5FAFF;
	padding: 1em;
}

html.skin-theme-clientpref-night .faq-header {
	background-color: #102040;
	border-color: #102550;
}

html.skin-theme-clientpref-night .faq {
	background-color: #041020;
	border-color: #051540;
}

@media screen and (prefers-color-scheme: dark) {
	html.skin-theme-clientpref-os .faq-header {
	    background-color: #102040;
	    border-color: #102550;
    }

    html.skin-theme-clientpref-os .faq {
	    background-color: #041020;
	    border-color: #051540;
    }
}