@function tint( $color, $percent ) {
	@return mix(white, $color, $percent);
}

@function shade( $color, $percent ) {
	@return mix(black, $color, $percent);
}


@mixin border-radius ( $radius ) {
	-webkit-border-radius: $radius;
	   -moz-border-radius: $radius;
	    -ms-border-radius: $radius;
	     -o-border-radius: $radius;
	        border-radius: $radius;
}

@mixin box-sizing($box-model) {
  -webkit-box-sizing: $box-model; // Safari <= 5
     -moz-box-sizing: $box-model; // Firefox <= 19
          box-sizing: $box-model;
}

@mixin box-shadow($top, $left, $blur, $color, $inset: false) {
  @if $inset {
    -webkit-box-shadow:inset $top $left $blur $color;
    -moz-box-shadow:inset $top $left $blur $color;
    box-shadow:inset $top $left $blur $color;
  } @else {
    -webkit-box-shadow: $top $left $blur $color;
    -moz-box-shadow: $top $left $blur $color;
    box-shadow: $top $left $blur $color;
  }
}

@mixin three-stop-gradient($fromColor, $middleColor, $toColor) {
	background-color: $toColor; /* Fallback */
	background-image: -webkit-linear-gradient(top, $fromColor, $middleColor, $toColor); /* Chrome 10+, Saf5.1+, iOS 5+ */
	background-image:    -moz-linear-gradient(top, $fromColor, $middleColor, $toColor); /* FF3.6 */
	background-image:     -ms-linear-gradient(top, $fromColor, $middleColor, $toColor); /* IE10 */
	background-image:      -o-linear-gradient(top, $fromColor, $middleColor, $toColor); /* Opera 11.10+ */
	background-image:         linear-gradient(top, $fromColor, $middleColor, $toColor);
	filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#{nth( $fromColor, 1 )}', EndColorStr='#{nth( $toColor, 1 )}');
}

@mixin radial-gradient ($fromColor, $toColor ) {
	background: $toColor; /* Fallback */
	background:     -ms-radial-gradient(center, ellipse farthest-corner, $fromColor 0%, $toColor 100%); /* IE10 Consumer Preview */ 
	background:    -moz-radial-gradient(center, ellipse farthest-corner, $fromColor 0%, $toColor 100%); /* Firefox */ 
	background:      -o-radial-gradient(center, ellipse farthest-corner, $fromColor 0%, $toColor 100%); /* Opera */ 
	background: -webkit-gradient(radial, center center, 0, center center, 497, color-stop(0, $fromColor), color-stop(1, $toColor)); /* Webkit (Safari/Chrome 10) */ 
	background: -webkit-radial-gradient(center, ellipse farthest-corner, $fromColor 0%, $toColor 100%); /* Webkit (Chrome 11+) */ 
	background: radial-gradient(ellipse farthest-corner at center, $fromColor 0%, $toColor 100%); /* W3C Markup, IE10 Release Preview */ 
}

@mixin keyframe ($animation_name) {
    @-webkit-keyframes #{$animation_name} {
        @content;
    }
 
    @-moz-keyframes #{$animation_name} {
        @content;
    }
 
    @-o-keyframes #{$animation_name} {
        @content;
    }
 
    @keyframes #{$animation_name} {
        @content;
    }
}

@mixin animation ($duration, $animation) {
	-webkit-animation-duration: $duration;
	-webkit-animation-name: $animation;
	-webkit-animation-fill-mode: forwards;
	-webkit-animation-iteration-count: infinite;
	-webkit-animation-timing-function: linear;
	-webkit-animation-direction: alternate;

	-moz-animation-duration: $duration;
	-moz-animation-name: $animation;
	-moz-animation-fill-mode: forwards;
	-moz-animation-iteration-count: infinite;
	-moz-animation-timing-function: linear;
	-moz-animation-direction: alternate;
	
	-o-animation-duration: $duration;
	-o-animation-name: $animation;
	-o-animation-fill-mode: forwards;
	-o-animation-iteration-count: infinite;
	-o-animation-timing-function: linear;
	-o-animation-direction: alternate;
	
	animation-duration: $duration;
	animation-name: $animation;
	animation-fill-mode: forwards;
	animation-iteration-count: infinite;
	animation-timing-function: linear;
	animation-direction: alternate;
}

@mixin close-icon () {
	position: absolute;
	top: -11px;
	right: -11px;
	width: 22px;
	height: 22px;
	border: 2px solid white;
	background-color: black;
	text-align: center;
	border-radius: 15px;
	cursor: pointer;
	z-index: 12;
	box-shadow: 2px 2px 6px #111;

	&:after {
		content: '\00d7';
		color: white;
		font-weight: bold;
		font-size: 18px;
		line-height: 22px;
		font-family: 'Courier New', Courier, monospace;
		padding-left: 1px;
	}

	&:hover {
		background-color: #092079;
		box-shadow: 2px 2px 9px #111;
	}
}

@mixin overlay-background () {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;

	@include radial-gradient( rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.7) );

	z-index: 10;

	// IE8- doesn't support RGBA and jQuery uses `filter:` for the fade-in
	// animation, so we need a child element that is used just for the display
	>div {
		position: absolute;
		top: 0;
		right: 0;
		left: 0;
		bottom: 0;

		// IE7-
		filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000);
		
		// IE8
		-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000)";
	}

	// IE9 has both filter and rgba support, so we need a hack to disable the filter
	>div:not([dummy]) {
		filter: progid:DXImageTransform.Microsoft.gradient(enabled='false');
	}
}

@mixin background-transision () {
	-webkit-transition: background-color 500ms linear;
	   -moz-transition: background-color 500ms linear;
	    -ms-transition: background-color 500ms linear;
	     -o-transition: background-color 500ms linear;
	transition: background-color 500ms linear;
}