PublishingCSS:TheNewSocial

body {
	background: linear-gradient( yellow, greenyellow );
}

.toclevel-3 {
	display: none;
}

h1, h2, h3, h4, h5 {
	color: red;
}

section:has( h2 ) {
	display: none;
}

section:has( 
	h1:target,
	h2:target,
	h3:target,
	h4:target
) {
	display: block;
}