.sect{
	display:inline-block;
	margin:0 20px 20px 0;
}
.box{
	margin:10px;
	padding:10px;
	width:150px;
	font-size:16px;
	color:white;
	border:1px solid #ccc;
}
.first1:has(.second1) {
	background-color:#a0a;
}
.first2:has(>.second2) {
	background-color:#0aa;
}
.first3:has(+.second3) {
	background-color:#aa0;
}
.first4:has(~.second4) {
	background-color:#00a;
}