@at-rule-wiwhout-params;
@at-rule with params;
@at-rule (with params);
/* comment */
.selector1 {
	color: #0f0
}
.selector2 {
	color: #0f0
}
/* another comment */
@at-rule (with params) {
	and-content: value
}
.selector3 {
	color: #0f0;
	.sub-selector {
content: "quotes is required for this CSS property"
	}
}