// 
// Gradients
// ==============================

// Gratefully taken from https://github.com/twbs/bootstrap

#gradient {

	// Horizontal gradient, from left to right
	//
	// Creates two color stops, start and end, by specifying a color and position for each color stop.
	// Color stops are not available in IE9 and below.
	.horizontal(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
		background-image: -webkit-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Safari 5.1-6, Chrome 10+
		background-image: -o-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Opera 12
		background-image: linear-gradient(to right, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
		background-repeat: repeat-x;
		filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@start-color),argb(@end-color))); // IE9 and down
	}

	// Vertical gradient, from top to bottom
	//
	// Creates two color stops, start and end, by specifying a color and position for each color stop.
	// Color stops are not available in IE9 and below.
	.vertical(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
		background-image: -webkit-linear-gradient(top, @start-color @start-percent, @end-color @end-percent);  // Safari 5.1-6, Chrome 10+
		background-image: -o-linear-gradient(top, @start-color @start-percent, @end-color @end-percent);  // Opera 12
		background-image: linear-gradient(to bottom, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
		background-repeat: repeat-x;
		filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down
	}

	.directional(@start-color: #555; @end-color: #333; @deg: 45deg) {
		background-repeat: repeat-x;
		background-image: -webkit-linear-gradient(@deg, @start-color, @end-color); // Safari 5.1-6, Chrome 10+
		background-image: -o-linear-gradient(@deg, @start-color, @end-color); // Opera 12
		background-image: linear-gradient(@deg, @start-color, @end-color); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
	}
	.horizontal-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
		background-image: -webkit-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);
		background-image: -o-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);
		background-image: linear-gradient(to right, @start-color, @mid-color @color-stop, @end-color);
		background-repeat: no-repeat;
		filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback
	}
	.vertical-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
		background-image: -webkit-linear-gradient(@start-color, @mid-color @color-stop, @end-color);
		background-image: -o-linear-gradient(@start-color, @mid-color @color-stop, @end-color);
		background-image: linear-gradient(@start-color, @mid-color @color-stop, @end-color);
		background-repeat: no-repeat;
		filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback
	}
	.radial(@inner-color: #555; @outer-color: #333) {
		background-image: -webkit-radial-gradient(circle, @inner-color, @outer-color);
		background-image: radial-gradient(circle, @inner-color, @outer-color);
		background-repeat: no-repeat;
	}
	.striped(@color: rgba(255,255,255,.15); @angle: 45deg) {
		background-image: -webkit-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
		background-image: -o-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
		background-image: linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
	}
}