a, b {
	color: white;

	@nest & c, & d {
		color: blue;
	}
}

a, b {
	color: white;

	@nest & c, & d {
		color: blue;

		@nest & e, & f {
			color: black;
		}
	}
}

a, b {
	color: red;

	@nest & & {
		color: white;
	}
}

a {
	color: red;

	@media {
		color: white;
	}
}

a {
	color: red;

	@nest & b {
		color: white;

		@media {
			color: blue;
		}
	}

	@media {
		color: black;

		@nest & c {
			color: yellow;
		}
	}
}

a {
	color: red;

	@unknown test {
		color: white;
	}
}

b {
	color: white;

	@phone {
		color: blue;
	}

	@media {
		color: black;

		@nest & c {
			color: yellow;
		}
	}
}