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// @required

//------------------------------------------
// Mixins
//------------------------------------------

$vendors: (webkit, ms);
$vendors_all: (webkit, moz, ms, o);

// Block
//------------------------------------------

// Clear floating
@mixin clear {
	clear: both;
	width:100%;
	height:0;
	display:block;
}

// Size of the box
@mixin box($w, $h, $lh: '') {
	width: $w;
	height: $h;
	@if $lh != '' {
		line-height: $lh;
	}
}

// Square box
@mixin square($s) {
	width: $s;
	height: $s;
	line-height: $s;
	text-align:center;
}

// Box shadow
@mixin box-shadow($bs...) {
	@each $v in $vendors {
		-#{$v}-box-shadow: $bs;
	}
	box-shadow: $bs;
}

// Box sizing
@mixin box-sizing($bs) {
	@each $v in $vendors {
		-#{$v}-box-sizing: $bs;
	}
	box-sizing: $bs;
}
@mixin border-box {
	@include box-sizing(border-box);
}
@mixin content-box {
	@include box-sizing(content-box);
}

// Border radius
@mixin border-radius($br...) {
	@each $v in $vendors {
		-#{$v}-border-radius: $br;
	}
	border-radius: $br;
}
@mixin border-round {
	@include border-radius(50%);
}
@mixin border-sharp {
	@include border-radius(0);
}

// Font
//------------------------------------------
@mixin font($fsize: '', $lh: '', $fweight: '', $fstyle: '') {
	@if $fsize != '' {
	font-size: $fsize;
	}
	@if $lh != '' {
	line-height: $lh;
	}
	@if $fweight != '' {
	font-weight: $fweight;
	}
	@if $fstyle != '' {
	font-style: $fstyle;
	}
}

// Background
//------------------------------------------

@mixin bg-cover($pos: center, $clr: '') {
	background-position: $pos;
	background-repeat:no-repeat;
	background-size:cover;
	@if $clr != '' {
	background-color:$clr;
	}
}
@mixin bg-contain($pos: center, $clr: '') {
	background-position: $pos;
	background-repeat:no-repeat;
	background-size:contain;
	@if $clr != '' {
	background-color:$clr;
	}
}
@mixin bg-mask($clr, $alpha:1, $z:'') {
	@include abs-cover($z);
	@if $alpha == 1 {
		background: $clr;
	} @else {
		background: rgba($clr, $alpha);
	}
}
@mixin fixed-mask($clr, $alpha:1, $z: '') {
	@include fixed-cover($z);
	@if $alpha == 1 {
		background: $clr;
	} @else {
		background: rgba($clr, $alpha);
	}
}

// Position
//------------------------------------------

@mixin rel-pos($t: 0, $r: 0, $b: 0, $l: 0, $z: '') {
	position: relative;
	@if $z != '' {
		z-index: $z;
	}
	top: $t;
	right: $r;
	bottom: $b;
	left: $l;
}
@mixin rel-lt($x:0, $y:0, $z: 1) {
	position:relative;
	@if $z != '' {
		z-index: $z;
	}
	top: $y;
	left: $x;
}

@mixin abs-cover($z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
//	width: 100%;
//	height: 100%;
}
@mixin abs-pos($t: 0, $r: 0, $b: 0, $l: 0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	top: $t;
	right: $r;
	bottom: $b;
	left: $l;
}

@mixin abs-lt($x:0, $y:0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	top: $y;
	left: $x;
}
@mixin abs-lc($x: 0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	top: 50%;
	left: $x;
	@include translateY(-50%);
}
@mixin abs-lb($x:0, $y:0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	bottom: $y;
	left: $x;
}

@mixin abs-rt($x:0, $y:0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	top: $y;
	right: $x;
}
@mixin abs-rc($x: 0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	top: 50%;
	right: $x;
	@include translateY(-50%);
}
@mixin abs-rb($x:0, $y:0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	bottom: $y;
	right: $x;
}

@mixin abs-ct($y: 0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	top: $y;
	left: 50%;
	@include translateX(-50%);
}
@mixin abs-cc($z: 1, $imp: '') {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	@if $imp == '' {
		top: 50%;
		left: 50%;
		@include translate(-50%, -50%);
	} @else {
		top: 50% !important;
		left: 50% !important;
		@each $v in $vendors {
			-#{$v}-transform: translate(-50%, 50%) !important;
		}
		transform: translate(-50%, 50%) !important;
	}
}
@mixin abs-cb($y: 0, $z: 1) {
	position:absolute;
	@if $z != '' {
		z-index: $z;
	}
	bottom: $y;
	left: 50%;
	@include translateX(-50%);
}

@mixin fixed-cover($z: '') {
	position: fixed;
	@if $z != '' {
		z-index: $z;
	}
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	width: 100%;
	height: 100%;
}

@mixin fixed-pos($t: 0, $r: 0, $b: 0, $l: 0, $z: '') {
	position:fixed;
	@if $z != '' {
		z-index: $z;
	}
	top: $t;
	right: $r;
	bottom: $b;
	left: $l;
}

@mixin fixed-lt($x:0, $y:0, $z: '') {
	position:fixed;
	@if $z != '' {
		z-index: $z;
	}
	top: $y;
	left: $x;
}
@mixin fixed-lb($x:0, $y:0, $z: '') {
	position:fixed;
	@if $z != '' {
		z-index: $z;
	}
	bottom: $y;
	left: $x;
}
@mixin fixed-rt($x:0, $y:0, $z: '') {
	position:fixed;
	@if $z != '' {
		z-index: $z;
	}
	top: $y;
	right: $x;
}
@mixin fixed-rb($x:0, $y:0, $z: '') {
	position:fixed;
	@if $z != '' {
		z-index: $z;
	}
	bottom: $y;
	right: $x;
}
@mixin fixed-cc($z: '') {
	position:fixed;
	@if $z != '' {
		z-index: $z;
	}
	top: 50%;
	left: 50%;
	@include translate(-50%, -50%);
}

// Flex
//------------------------------------------

@mixin flex() {
	@each $v in $vendors {
		@if $v == ms {
			display: -ms-flexbox;
		} @else {
			display: unquote("-#{$v}-flex");
		}
	}
	display: flex;
}
@mixin flex_important() {
	@each $v in $vendors {
		@if $v == ms {
			display: -ms-flexbox !important;
		} @else {
			display: unquote("-#{$v}-flex") !important;
		}
	}
	display: flex !important;
}
@mixin flex-basis($d) {
	@each $v in $vendors {
		-#{$v}-flex-basis: $d;
	}
	flex-basis: $d;
}
@mixin flex-wrap($d) {
	@each $v in $vendors {
		-#{$v}-flex-wrap: $d;
	}
	flex-wrap: $d;
}
@mixin flex-direction($d) {
	@each $v in $vendors {
		-#{$v}-flex-direction: $d;
	}
	flex-direction: $d;
}
@mixin flex-grow($d) {
	@each $v in $vendors {
		-#{$v}-flex-grow: $d;
	}
	flex-grow: $d;
}
@mixin flex-shrink($d) {
	@each $v in $vendors {
		-#{$v}-flex-shrink: $d;
	}
	flex-shrink: $d;
}
@mixin flex-align-items($a) {
	@each $v in $vendors {
		@if $v == ms {
			-ms-flex-align: if($a==flex-start, start, if($a==flex-end, end, $a));
		} @else {
			-#{$v}-align-items: $a;
		}
	}
	align-items: $a;
}
@mixin flex-align-self($a) {
	@each $v in $vendors {
		@if $v == ms {
			-ms-align-self: if($a==flex-start, start, if($a==flex-end, end, $a));
		} @else {
			-#{$v}-align-self: $a;
		}
	}
	align-self: $a;
}
@mixin flex-align-content($a) {
	@each $v in $vendors {
		@if $v == ms {
			-ms-flex-line-pack: if($a==flex-start, start, if($a==flex-end, end, $a));
		} @else {
			-#{$v}-align-content: $a;
		}
	}
	align-content: $a;
}
@mixin flex-justify-content($j) {
	@each $v in $vendors {
		@if $v == ms {
			-ms-flex-pack: if($j==flex-start, start, if($j==flex-end, end, $j));
		} @else {
			-#{$v}-justify-content: $j;
		}
	}
	justify-content: $j;
}
@mixin flex-justify-items($j) {
	@each $v in $vendors {
		-#{$v}-justify-items: $j;
	}
	justify-items: $j;
}
@mixin flex-justify-self($j) {
	@each $v in $vendors {
		-#{$v}-justify-self: $j;
	}
	justify-self: $j;
}

// Columns
@mixin flex-columns($c) {
	@each $v in $vendors {
		-#{$v}-column-count: $c;
	}
	column-count: $c;
}
@mixin flex-columns-gap($g) {
	@each $v in $vendors {
		-#{$v}-column-gap: $g;
	}
	column-gap: $g;
}

// Transitions
//------------------------------------------
$delay: 0.3s;
$ease: ease;

@mixin transition($params...) {
	@each $v in $vendors {
		-#{$v}-transition: if(str-slice(nth(nth($params, 1), 1), 0, 9) == transform, unquote("-#{$v}-#{$params}"), $params);
	}
	transition: $params;
}
@mixin transition-property($prop, $d: $delay, $e: $ease) {
	@include transition($prop $d $e);
}
@mixin transition-properties($props...) {
	$buf: '';
	@each $p in $props {
		@if $buf == '' {
			$buf: unquote("#{$p} #{$delay} #{$ease}");
		} @else {
			$buf: unquote("#{$buf}, #{$p} #{$delay} #{$ease}");
		}
	}
	@include transition($buf);
}
@mixin transition-none {
	@include transition(none);
}
@mixin transition-all($d: $delay, $e: $ease) {
	@include transition(all $d $e);
}
@mixin transition-color($d: $delay, $e: $ease) {
	@include transition(color $d $e);
}
@mixin transition-bg-color($d: $delay, $e: $ease) {
	@include transition(background-color $d $e);
}
@mixin transition-bd-color($d: $delay, $e: $ease) {
	@include transition(border-color $d $e);
}
@mixin transition-colors($d: $delay, $e: $ease) {
	@include transition(color $d $e, background-color $d $e, border-color $d $e);
}
@mixin transition-timing($x1, $y1, $x2, $y2) {
	@each $v in $vendors {
		-#{$v}-transition-timing-function: cubic-bezier($x1, $y1, $x2, $y2);
	}
	transition-timing-function: cubic-bezier($x1, $y1, $x2, $y2);
}
@mixin transition-duration($d) {
	@each $v in $vendors {
		-#{$v}-transition-duration: $d;
	}
	transition-duration: $d;
}
@mixin transition-delay($d) {
	@each $v in $vendors {
		-#{$v}-transition-delay: $d;
	}
	transition-delay: $d;
}

// Transform
//------------------------------------------
@mixin transform($params...) {
	@each $v in $vendors {
		-#{$v}-transform: $params;
	}
	transform: $params;
}
@mixin transform-none {
	@each $v in $vendors {
		-#{$v}-transform: none;
	}
	transform: none;
}
@mixin transform-origin($params...) {
	@each $v in $vendors {
		-#{$v}-transform-origin: $params;
	}
	transform-origin: $params;
}
@mixin transform-style($s) {
	@each $v in $vendors {
		-#{$v}-transform-style: $s;
	}
	transform-style: $s;
}
@mixin preserve3d {
	@each $v in $vendors {
		-#{$v}-transform-style: preserve-3d;
	}
	transform-style: preserve-3d;
}

@mixin translate($x: -50%, $y: -50%) {
	@each $v in $vendors {
		-#{$v}-transform: translate($x, $y);
	}
	transform: translate($x, $y);
}
@mixin translate3d($x: 0, $y: 0, $z: 0) {
	@each $v in $vendors {
		-#{$v}-transform: translate3d($x, $y, $z);
	}
	transform: translate3d($x, $y, $z);
}
@mixin translateX($x: -50%) {
	@each $v in $vendors {
		-#{$v}-transform: translateX($x);
	}
	transform: translateX($x);
}
@mixin translateY($y: -50%) {
	@each $v in $vendors {
		-#{$v}-transform: translateY($y);
	}
	transform: translateY($y);
}

@mixin rotate($a) {
	@each $v in $vendors {
		-#{$v}-transform: rotate($a);
	}
	transform: rotate($a);
}
@mixin rotateX($a) {
	@each $v in $vendors {
		-#{$v}-transform: rotateX($a);
	}
	transform: rotateX($a);
}
@mixin rotateY($a) {
	@each $v in $vendors {
		-#{$v}-transform: rotateY($a);
	}
	transform: rotateY($a);
}
@mixin rotateZ($a) {
	@each $v in $vendors {
		-#{$v}-transform: rotateZ($a);
	}
	transform: rotateZ($a);
}

@mixin scale($x: 0, $y: '') {
	@if $y == '' {
		$y: $x;
	}
	@each $v in $vendors {
		-#{$v}-transform: scale($x, $y);
	}
	transform: scale($x, $y);
}
@mixin scaleX($x: 0) {
	@each $v in $vendors {
		-#{$v}-transform: scaleX($x);
	}
	transform: scaleX($x);
}
@mixin scaleY($y: 0) {
	@each $v in $vendors {
		-#{$v}-transform: scaleY($y);
	}
	transform: scaleY($y);
}
@mixin scale3d($x: 0, $y: 0, $z: 0) {
	@each $v in $vendors {
		-#{$v}-transform: scale3d($x, $y, $z);
	}
	transform: scale3d($x, $y, $z);
}

@mixin skew($x: 0, $y: '') {
	@if $y == '' {
		$y: $x;
	}
	@each $v in $vendors {
		-#{$v}-transform: skew($x, $y);
	}
	transform: skew($x, $y);
}

@mixin perspective($p) {
	@each $v in $vendors {
		-#{$v}-perspective: $p;
	}
	perspective: $p;
}
@mixin perspective-origin($params...) {
	@each $v in $vendors {
		-#{$v}-perspective-origin: $params;
	}
	perspective-origin: $params;
}

// Backface visibility
@mixin backface-hidden {
	@each $v in $vendors {
		-#{$v}-backface-visibility: hidden;
	}
	backface-visibility: hidden;
}
@mixin backface-visible {
	@each $v in $vendors {
		-#{$v}-backface-visibility: visible;
	}
	backface-visibility: visible;
}

// Filters
//------------------------------------------

@mixin filter($params...) {
	@each $v in $vendors_all {
		-#{$v}-filter: $params;
	}
	filter: $params;
}

// Animation
//------------------------------------------
@mixin animation($params...) {
	@each $v in $vendors {
		-#{$v}-animation: $params;
	}
	animation: $params;
}
@mixin animation-timing($t) {
	@each $v in $vendors {
		-#{$v}-animation-timing-function: $t;
	}
	animation-timing-function: $t;
}
@mixin animation-delay($t) {
	@each $v in $vendors {
		-#{$v}-animation-delay: $t;
	}
	animation-delay: $t;
}

// Utils
//------------------------------------------

@mixin user-select($s) {
	-webkit-user-select: $s;
	-khtml-user-select: $s;
	-moz-user-select: $s;
	-ms-user-select: $s;
	user-select: $s;
}
@mixin user-select-none {
	@include user-select(none);
}

@mixin external-link {
	content: '\f504';
	font-family: 'dashicons';
	font-weight: normal;
	display: inline-block;
	vertical-align: baseline;
	line-height: inherit;
	position: relative;
	top: 3px;
	left: 0.3em;		
}