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// breakpoints.scss v1.0 | @ajlkn | MIT licensed */

// Vars.

/// Breakpoints.
	/// @var {list}
	$breakpoints: () !global;

// Mixins.

/// Sets breakpoints.
	/// @param {map} $x Breakpoints.
	@mixin breakpoints($x: ()) {
		$breakpoints: $x !global;
	}

/// Wraps @content in a @media block targeting a specific orientation.
	/// @param {string} $orientation Orientation.
	@mixin orientation($orientation) {
		@media screen and (orientation: #{$orientation}) {
			@content;
		}
	}

/// Wraps @content in a @media block using a given query.
	/// @param {string} $query Query.
	@mixin breakpoint($query: null) {

$breakpoint: null;
		$op: null;
		$media: null;

// Determine operator, breakpoint.

// Greater than or equal.
				@if (str-slice($query, 0, 2) == '>=') {

$op: 'gte';
					$breakpoint: str-slice($query, 3);

}

// Less than or equal.
				@elseif (str-slice($query, 0, 2) == '<=') {

$op: 'lte';
					$breakpoint: str-slice($query, 3);

}

// Greater than.
				@elseif (str-slice($query, 0, 1) == '>') {

$op: 'gt';
					$breakpoint: str-slice($query, 2);

}

// Less than.
				@elseif (str-slice($query, 0, 1) == '<') {

$op: 'lt';
					$breakpoint: str-slice($query, 2);

}

// Not.
				@elseif (str-slice($query, 0, 1) == '!') {

$op: 'not';
					$breakpoint: str-slice($query, 2);

}

// Equal.
				@else {

$op: 'eq';
					$breakpoint: $query;

}

// Build media.
			@if ($breakpoint and map-has-key($breakpoints, $breakpoint)) {

$a: map-get($breakpoints, $breakpoint);

// Range.
					@if (type-of($a) == 'list') {

$x: nth($a, 1);
						$y: nth($a, 2);

// Max only.
							@if ($x == null) {

// Greater than or equal (>= 0 / anything)
									@if ($op == 'gte') {
										$media: 'screen';
									}

// Less than or equal (<= y)
									@elseif ($op == 'lte') {
										$media: 'screen and (max-width: ' + $y + ')';
									}

// Greater than (> y)
									@elseif ($op == 'gt') {
										$media: 'screen and (min-width: ' + ($y + 1) + ')';
									}

// Less than (< 0 / invalid)
									@elseif ($op == 'lt') {
										$media: 'screen and (max-width: -1px)';
									}

// Not (> y)
									@elseif ($op == 'not') {
										$media: 'screen and (min-width: ' + ($y + 1) + ')';
									}

// Equal (<= y)
									@else {
										$media: 'screen and (max-width: ' + $y + ')';
									}

}

// Min only.
							@else if ($y == null) {

// Greater than or equal (>= x)
									@if ($op == 'gte') {
										$media: 'screen and (min-width: ' + $x + ')';
									}

// Less than or equal (<= inf / anything)
									@elseif ($op == 'lte') {
										$media: 'screen';
									}

// Greater than (> inf / invalid)
									@elseif ($op == 'gt') {
										$media: 'screen and (max-width: -1px)';
									}

// Less than (< x)
									@elseif ($op == 'lt') {
										$media: 'screen and (max-width: ' + ($x - 1) + ')';
									}

// Not (< x)
									@elseif ($op == 'not') {
										$media: 'screen and (max-width: ' + ($x - 1) + ')';
									}

// Equal (>= x)
									@else {
										$media: 'screen and (min-width: ' + $x + ')';
									}

}

// Min and max.
							@else {

// Greater than or equal (>= x)
									@if ($op == 'gte') {
										$media: 'screen and (min-width: ' + $x + ')';
									}

// Less than or equal (<= y)
									@elseif ($op == 'lte') {
										$media: 'screen and (max-width: ' + $y + ')';
									}

// Greater than (> y)
									@elseif ($op == 'gt') {
										$media: 'screen and (min-width: ' + ($y + 1) + ')';
									}

// Less than (< x)
									@elseif ($op == 'lt') {
										$media: 'screen and (max-width: ' + ($x - 1) + ')';
									}

// Not (< x and > y)
									@elseif ($op == 'not') {
										$media: 'screen and (max-width: ' + ($x - 1) + '), screen and (min-width: ' + ($y + 1) + ')';
									}

// Equal (>= x and <= y)
									@else {
										$media: 'screen and (min-width: ' + $x + ') and (max-width: ' + $y + ')';
									}

}

// String.
					@else {

// Missing a media type? Prefix with "screen".
							@if (str-slice($a, 0, 1) == '(') {
								$media: 'screen and ' + $a;
							}

// Otherwise, use as-is.
							@else {
								$media: $a;
							}

}

// Output.
	        @media #{$media} {
				@content;
			}

}