$pass: green !default;
$fail: red;
$width: 600px;
$number: 5;

.color {
	color: $pass;
}

$orientation: landscape;

@media (min-width: $width), handheld and (orientation: $orientation) {
	$pass: white !default;

	.color {
		color: $pass;
	}
}

@if 1 == 1 {
	.is-1-equal-to-1 {
		color: $pass;
	}
} @else {
	.not-is-1-equal-to-1 {
		color: $fail;
	}
}

@if 1 == 2 {
	.is-1-equal-to-2 {
		color: $fail;
	}
} @else {
	.not-is-1-equal-to-2 {
		color: $pass;
	}
}

@if $number == 1 {
	.is-number-equal-to-1 {
		color: $fail;
	}
} @else {
	.not-number-equal-to-1 {
		color: $pass;
	}
}

@if $number == 5 {
	.is-number-equal-to-5 {
		color: $pass;
	}
} @else {
	.not-number-equal-to-5 {
		color: $fail;
	}
}

@if 1 != 1 {
	.is-1-not-equal-to-1 {
		color: $fail;
	}
}

@if 1 != 2 {
	.is-1-not-equal-to-2 {
		color: $pass;
	}
}

@if 1 < 0 {
	.is-1-less-than-0 {
		color: $fail;
	}
}

@if 1 < 1 {
	.is-1-less-than-1 {
		color: $fail;
	}
}

@if 1 < 2 {
	.is-1-less-than-2 {
		color: $pass;
	}
}

@if 1 > 0 {
	.is-1-greater-than-0 {
		color: $pass;
	}
}

@if 1 > 1 {
	.is-1-greater-than-1 {
		color: $fail;
	}
}

@if 1 > 2 {
	.is-1-greater-than-2 {
		color: $fail;
	}
}

@if 1 <= 0 {
	.is-1-less-than-or-equal-to-0 {
		color: $fail;
	}
}

@if 1 <= 1 {
	.is-1-less-than-or-equal-to-1 {
		color: $pass;
	}
}

@if 1 <= 2 {
	.is-1-less-than-or-equal-to-2 {
		color: $pass;
	}
}

@if 1 >= 0 {
	.is-1-less-than-or-equal-to-0 {
		color: $pass;
	}
}

@if 1 >= 1 {
	.is-1-less-than-or-equal-to-1 {
		color: $pass;
	}
}

@if 1 >= 2 {
	.is-1-less-than-or-equal-to-2 {
		color: $fail;
	}
}

@for $i from 1 to 5 by 2 {
	.for-$i {
		width: $(i)px;
	}
}

@for $i from 6 to 1 by 2 {
	.for-$i {
		height: $(i)px;
	}
}

@each $i in (foo, bar, baz) {
	.test-$i {
		color: $pass;
	}
}

.phone {
	&_title {
		width: 500px;

		@media (max-width: 500px) {
			width: auto;
		}

		body.is_dark & {
			color: white;

			@at-root {
				.phablet {
					color: $pass;
				}
			}
		}
	}

	img {
		display: block;
	}
}

@define-placeholder foo {
	background: pink;
}

.bar {
	@extend foo;

	background-color: @color;
	color: $pass;
}