/*
 *	3L was made for YOU to help you create awesome websites
 * and fill the Internet with excessive amount of Love! ♥
 *
 * Keep up your good work!
 *
 * Yours faithfully,
 * Mateusz ★ Kocz  			-> http://radiatingstar.com
 *
 * 3L:							-> http://mateuszkocz.github.com/3l
 *
 * Watch 3L on Github:		-> https://github.com/mateuszkocz/3l
 *
 * Submit a bug issue:		-> https://github.com/mateuszkocz/3l/issues?state=open
 *
 *
 * Licensed under the Apache License v2.0
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Version: 1.3.2 (2012.08.28)
 *
 */

/*
 * To compile all of the code you need to use a compiler
 * that supports JavaScript code and guarder mixins.
 * WinLess meets those requirements. You can find it on winless.org
 *
 * If you're on a Mac and your compiler meets the requirements,
 * please, let me know via Twitter or GitHub!
 *
 */

/* ACTIVATE SUPPORTING CLASSES */
/* Uncomment ones you want to use or put them in html or body elements in your style sheet. */
/* For the explanation what those classes do, read further. */

	//html { // If you want to use those classes, uncomment also the html element.
	//.seo-helper;
	//.box-sizing() // Put in the brackets box-model you want to use.
	//} // CAUTION! If you're using any of those supporting classes, uncomment that bracket!

/*
 * SEO & HTML Debugging
 *
 * A useful supporting class that will help a bit with your SEO
 * and usability of your website.
 *
 * Creating a website is a serious business, but sometimes you may
 * forget about some important details. This class will help you.
 * It will let you know when you haven't put an alt attribute on image
 * or kept that attribute empty, when you haven't typed a URL in anchor or when
 * anchor link has rel=nofollow attribute. It will also show you an alert
 * message if you don't have a <title> tag and description or left them empty*.
 *
 * If any of the errors described above happens, according element will
 * get a red outline border drawing your attention and asking for some love
 * or you will get a message with the same purpose.
 *
 * *** * The <title> reminder can alert you even if you have a <title> tag.
 * ***	This happens if you have a <link> tag (usually used for style sheets)
 * ***	before <title> in your HTML. Just change the order of <link> and
 * ***	<title> and you're cool.
 *
 * How to:
 * Place the .seo-helper class in html element. That's it!
 *
 * *** Example: html {.seo-helper}
 *
 * That way every element on your page will be affected
 * by this rule. You can also place it in any other container
 * class element in your code (body, div.wrapper, article and so on)
 * if you don't want for some reasons to check for bugs on whole page
 * but in single area.
 *
 * Caution! Do not forget to delete this class before finishing your
 * project, unless you want to keep it in continuous project (like blog)
 * and debug every new content on your site. But then you might consider
 * restyling this class to be a bit more eye-pleasing.
 *
 * This may not work in every browser, but since you are a web 
 * developer/designer you're probably already using a bleeding
 * edge nightly alpha back-door version of browser, so no problem!
 * It's probably the only class you don't need to care about how
 * your visitors will see it!
 *
 * *** Aside - How it works:
 * *** Section only for people who don't know yet what attribute
 * *** selectors and negation pseudo-class are.
 * *** 
 * *** Using negation pseudo-class is like saying "target every element x
 * *** that doesn't have attribute y" or "target every element exept (but 'not') z".
 * *** You can read more about that here ->www.w3.org/TR/selectors/#negation.
 * *** 
 * *** Attribute selectors are rules that target elements that have
 * *** some specified attributes (rel, alt, href etc.) and/or specified
 * *** value of this attributes. Read more on this topic here
 * *** ->www.w3.org/TR/selectors/#selectors.
 *
 * For a further explanation and a demo, refer to:
 * -> http://radiatingstar.com/how-to-improve-seo-with-css
 *
 * Why img:not([alt]), img[alt=""] and img[alt^=" "]?
 * First targets images that don't have an alt attribute, second targets
 * ones that have this attribute but it's left empty (probably left by
 * automatic completion of html editor), third is just in case - it
 * might have been left by html editor or manually "to do it later" (clearly
 * a space at the beginning of an alt can't be anything good).
 *
 * Why a[href=""]?
 * If you write an anchor text and leave href to copyPaste URL later,
 * it will reminding you about that.
 *
 * Why a[rel="nofollow"]?
 * For some reasons links on your site may have this attribute and this
 * may generate a huge SEO problem. Better fix it ASAP. (On the other hand
 * nofollow links might be useful in some situations. See here:
 * -> http://en.wikipedia.org/wiki/Nofollow#Control_internal_PageRank_flow)
 *
 * Why div:empty, span:empty, li:empty, p:empty, td:empty, th:empty?
 * It'll just check if you have some redundancy (empty elements) in you code.
 *
 */
 
.seo-helper () {
	img:not([alt]), img[alt=""], img[alt^=" "],
	a[href=""], a[href^=" "], a[href="#"], a[rel*="nofollow"],
	div:empty, span:empty, li:empty, p:empty, td:empty, th:empty,
	*[title=""], *[class=""], *[id=""] {
		outline: 2px solid red !important;
		outline-offset: 3px !important;
		}
	head, title:empty, link, meta {display: block;}
	title:empty:before {content: "You've left the <title> empty!"}
	link:before {content: "You don't have a <title>!"}
	title ~ link {display: none;}
	meta[name="description"][content=""]:before, meta[name="description"][content=" "]:before {content: "You've left description empty!";}
	}
	
/*
 * Helper classes from HTML5 Boilerplate
 * 
 * Classes below help you create a better user experience for both users
 * of browsers and screen readers. Oh, and there's also a clearfix! 
 * 
 * All the classes comes from HTML5 Boilerplate (-> html5boilerplate.com). Here though,
 * they're changed so that they can be easily used in The LESS Way.
 * They're called "non-semantic" in H5B, but here they become semantic if used well.
 * (Actually they can't be used in any way than good in 3L.)
 * (Actually II they can be semantic in H5B as well, but it's a bit pain to do that.)
 * 
 * Usage:
 * Just put them in your classes, id's or elements.
 * 
 * Example:
 * .YOUR-AWESOME-CLASS-NAME {
 *						// some rules 
 *						.clearfix;
 *						}
 * 
 */

// For image replacement.
.ir () {display: block; border: 0; text-indent: -999em; overflow: hidden; background-color: transparent; background-repeat: no-repeat; text-align: left; direction: ltr; *line-height: 0; br {display: none;}}

// Hide from both screenreaders and browsers: h5bp.com/u
.hidden () {display: none !important; visibility: hidden;}

// Hide only visually, but have it available for screenreaders: h5bp.com/v
.visuallyhidden () {border: 0;clip: rect(0 0 0 0);height: 1px;margin: -1px;overflow: hidden;padding: 0;position: absolute;width: 1px;}
	
// Extends the .visuallyhidden class to allow the element to be focusable when navigated to via the keyboard: h5bp.com/p
// CAUTION! The .visuallyhidden class is included! If you want your object be both
// .visuallyhidden and .focusabe use only .focusable class.
.focusable () {.visuallyhidden;&:active,&:focus{clip: auto; height: auto; margin: 0; overflow: visible; position: static; width: auto;}}

// Hide visually and from screenreaders, but maintain layout.
.invisible () {visibility: hidden;}

// Contain floats: h5bp.com/q
.clearfix () {*zoom:1;&:before,&:after{content:"";display:table;}&:after{clear:both;}}

/*
 * Box-sizing
 * 
 * Change the basic box-model to the one you want.
 * 
 * Basic box-model defines the width and height of an object only as a size of
 * object's content area. In order to know exactly how big is the object you need
 * to add its padding and borders. This may result in many unwanted behaviours.
 * That's why you can define how you want the browser to calculate the width/height:
 * with or without padding, with or without borders.
 * 
 * To use this feature just put a value you want:
 * -- content-box ("content" works too) - it's default value from basic model.
 * -- padding-box (also "padding") - width and height declarations will include paddings.
 * -- border-box (and "border") - border and padding included.
 * 
 * Usage:
 * 1. .box-sizing(content-box), .box-sizing(content) and .content-box-sizing* for box-sizing: content-box.
 * 2. .box-sizing(padding-box), .box-sizing(padding) and .padding-box-sizing* for box-sizing: padding-box.
 * 3. .box-sizing(border-box), .box-sizing(padding) and .border.box-sizing* for box-sizing: border-box.
 *
 * * Beware not to use those properties without -sizing suffix thus suffixless classes are for background-clip (see this class below).
 *
 * Resources:
 * -- http://paulirish.com/2012/box-sizing-border-box-ftw/
 * 
 * Browsers support: IE8+ and every other.
 * Notable lack of support: IE7-
 * 
 */
 
.content-box-sizing(){-moz-box-sizing:content-box;-webkit-box-sizing:content-box;box-sizing:content-box;}
.padding-box-sizing(){-moz-box-sizing:padding-box;-webkit-box-sizing:padding-box;box-sizing:padding-box;}
.border-box-sizing(){-moz-box-sizing:border-box;-webkit-box-sizing:border-box;box-sizing:border-box;}
.box-sizing (padding) {.padding-box-sizing;}
.box-sizing (padding-box){.padding-box-sizing;}
.box-sizing (border){.border-box-sizing;}
.box-sizing (border-box){.border-box-sizing;}
.box-sizing (content){.content-box-sizing;}
.box-sizing (content-box){.content-box-sizing;}

/*
 * Background-clip
 * 
 * Clips the object's background to the desired box according to the box-model.
 * 
 * To use this class simply put into an object a .background-clip(box) class,
 * where box means the desired box (see below). You can also use a shorter class
 * .bg-clip or class that corresponds to the clipping you want to get (.content-clip,
 * .padding-clip, .border-clip).
 * 
 * Arguments that comes into (box) are:
 * -- content-box or content for content clip,
 * -- padding-box or padding for padding clip,
 * -- border-box or border for border clip.
 * *** You can use values either with or without "-box" suffix.
 *
 * Browsers support: IE9+ and every other.
 * Notable lack of support: IE8-
 *
 */

.content-box(){-moz-background-clip:content;background-clip:content-box;}
.padding-box(){-moz-background-clip:padding;background-clip:padding-box;}
.border-box(){-moz-background-clip:border;background-clip:border-box;}
.background-clip (padding){.padding-box;}
.background-clip (padding-box){.padding-box;}
.background-clip (border){.border-box;}
.background-clip (border-box){.border-box;}
.background-clip (content){.content-box;}
.background-clip (content-box){.content-box;}
.bg-clip(@arguments){.background-clip(@arguments);}

/* 
 * Box-shadow
 * Create a shadow behind or inside the element.
 * 
 * Usage:
 * In .box-shadow() brackets put arguments for every single shadow. Separate
 * each shadows' arguments with comma. You can put up to five shadows
 * by default but feel free to add a class with as many as you want.
 * Just check how it is done.
 *
 * You can use a default box-shadow which will create a shadow with
 * 0px x and 1px y offsets, 3px of blur and in black colour with 25% transparency.
 * Just place a .box-shadow class without any arguments.
 * 
 * Box-shadow property takes following arguments:
 *
 * 1. inset [optional].
 * 2. x-offset [required].
 * 3. y-offset [required].
 * 4. blur [optional]. 
 * 5. spread [optional].
 * 6. color [optional/required].
 *
 * Resources:
 * -- developer.mozilla.org/en/CSS/box-shadow
 *
 * Browsers support: IE9, Fx3.5, Chrome, Opera, Safari, Opera Mobile, Android Browser
 * Notable lack of support: IE8-, Opera Mini
 *
 * Example:
 * Two box-shadows: one is 1px offset, black, second one is green with 30% opacity, inset,
 * with 5px offsets, 3px of blur and 1px spread.
 * .box-shadow(1px 1px black, inset 5px 5px 3px 1px fade(green,30%)) // fade(colour,XX%) is a LESS native function
 *																							// that adds alpha channel to colour. Instead of fade()
 *																							// you can also use rgba or hsla colours declaration.
 *
 */
// One shadow:
.box-shadow (@shadow: 0 1px 3px fade(#000,25%)){
	-webkit-box-shadow: @arguments;
	-moz-box-shadow: @arguments;
	box-shadow: @arguments;
}
// Two shadows:
.box-shadow (@shadow1, @shadow2){
	-webkit-box-shadow: @shadow1, @shadow2;
	-moz-box-shadow: @shadow1, @shadow2;
	box-shadow: @shadow1, @shadow2;
}
// Three shadows:
.box-shadow (@shadow1, @shadow2, @shadow3){
	-webkit-box-shadow: @shadow1, @shadow2, @shadow3;
	-moz-box-shadow: @shadow1, @shadow2, @shadow3;
	box-shadow: @shadow1, @shadow2, @shadow3;
}
// Four shadows:
.box-shadow (@shadow1, @shadow2, @shadow3, @shadow4){
	-webkit-box-shadow: @shadow1, @shadow2, @shadow3, @shadow4;
	-moz-box-shadow: @shadow1, @shadow2, @shadow3, @shadow4;
	box-shadow: @shadow1, @shadow2, @shadow3, @shadow4;
}
// Five shadows:
.box-shadow (@shadow1, @shadow2, @shadow3, @shadow4, @shadow5){
	-webkit-box-shadow: @shadow1, @shadow2, @shadow3, @shadow4, @shadow5;
	-moz-box-shadow: @shadow1, @shadow2, @shadow3, @shadow4, @shadow5;
	box-shadow: @shadow1, @shadow2, @shadow3, @shadow4, @shadow5;
}

/* 
 * Border-radius
 * Round the element's corners.
 * 
 * Usage: 
 * Border-radius property takes one to four arguments with px, em and %
 * values and round the element's corners accordingly. You can make
 * ellipticaly roundeded corners putting two sets of values separated with
 * comma using .elliptical-border-radius class. In order to round a single
 * corner use .round-corner class. This class takes two sets of arguments.
 * First one is a declaration of corner you want to round (top-left, top-right,
 * bottom-right, bottom-left), second one (separated from the first with comma),
 * is a set of values in px, em or % that round choosen corner. Second
 * declaration can have one (for circle rounding) or two values (for
 * elliptical rounding).
 *  
 * For further explanation of the border-radius property, refer to the 
 * resources section above.
 * 
 * Resources:
 * -- developer.mozilla.org/en/CSS/border-radius
 *
 * Browsers support: IE9, Fx3.5, Chrome, Opera, Safari, Opera Mobile, Android Browser
 * Notable lack of support: IE8-, Opera Mini
 *
 * Example:
 * 1. Round every corner of the element with 10px radius.
 *		.border-radius(10px)
 * 2. Round top-left and bottom-right corners by 10px, top-right
 *		and bottom-left corners by 20px.
 *		.border-radius(10px 20px)
 * 3	Exemplary use of the .elliptical-border-radius class.
 * 	.elliptical-border-radius(10px 20px 30px, 40px 50px 60px 70px)
 * 4. Round top-right corner by 10px and 20px (elliptical).
 * 	.round-corner(top-right, 10px 20px)
 *		.border-top-right-radius(10px 20px) // Alternate method.
 * 5. Round similar corners.
 * 	.border-top-radius(20px 10px); // top-left + top-right (elliptical)
 *		.border-left-radius(5px);		 // top-left + bottom-left
 *
 */

// If your rounded corners looks bad with borders add this class to your rounded element.
// -> http://tumble.sneak.co.nz/post/928998513/fixing-the-background-bleed
.border-radius-fix(){.background-clip(padding-box);}

.border-radius (@radius:5px, ...) {
	-webkit-border-radius: @arguments;
	-moz-border-radius: @arguments;
	border-radius: @arguments;
}
// Alternate name for .border-radius.
.round-corners (@radius:5px, ...) {.border-radius(@arguments);}

.elliptical-border-radius (@radius1, @radius2) {
	-webkit-border-radius: @radius1 ~"/" @radius2;
	-moz-border-radius: @radius1 ~"/" @radius2;
	border-radius: @radius1 ~"/" @radius2;
}
.round-corner (top-left, @radius...){
	-webkit-border-top-left-radius: @radius;
	-moz-border-top-left-radius: @radius;
	border-top-left-radius: @radius;
}
.round-corner (top-right, @radius...){
	-webkit-border-top-right-radius: @radius;
	-moz-border-top-right-radius: @radius;
	border-top-right-radius: @radius;
}
.round-corner (bottom-right, @radius...) {
	-webkit-border-bottom-right-radius: @radius;
	-moz-border-bottom-right-radius: @radius;
	border-bottom-right-radius: @radius;
}
.round-corner (bottom-left, @radius...) {
	-webkit-border-bottom-left-radius: @radius;
	-moz-border-bottom-left-radius: @radius;
	border-bottom-left-radius: @radius;
}
// Another methods to use corner radius.
.border-top-left-radius (...) {.round-corner(top-left,@arguments);}
.border-top-right-radius (...) {.round-corner(top-right,@arguments);}
.border-bottom-right-radius (...) {.round-corner(bottom-right,@arguments);}
.border-bottom-left-radius (...) {.round-corner(bottom-left,@arguments);}

// Round similar corners.
.border-top-radius (...) {.round-corner(top-left,@arguments);.round-corner(top-right,@arguments);}
.border-bottom-radius (...) {.round-corner(bottom-left,@arguments);.round-corner(bottom-right,@arguments);}
.border-left-radius (...) {.round-corner(top-left,@arguments);.round-corner(bottom-left,@arguments);}
.border-right-radius (...) {.round-corner(top-right,@arguments);.round-corner(bottom-right,@arguments);}

// Another classes for the same purpose as above.
.round-top-corners (...) {.border-top-radius(@arguments);}
.round-bottom-corners (...) {.border-bottom-radius(@arguments);}
.round-left-corners (...) {.border-left-radius(@arguments);}
.round-right-corners (...) {.border-right-radius(@arguments);}

/* 
 * Opacity
 * Make an object transparent.
 *
 * Opacity takes values between 0.0 (invisible) to 1.0 (default - full
 * visibility) but 3L lets you also use percentages and values from >1 to 100.
 *
 * If you want an element with transparency 1, .5 or 0, use these classes:
 * .not-transparent., .half-transparent, .transparent.
 *
 * Browsers support: full (IE6+)
 * Caution! According to -> caniuse.com/#search=opacity, transparency doesn't
 * work well with PNG images that are itself transparent (use alpha channel) in IE8-.
 *
 * Aside:
 * Do we need the ability to set opacity in numbers from 1 to 100
 * and in percentages? I think we do, because:
 * 1. You need to use integer numbers in filter property for IE,
 * 	so there is a possibility that someone will type this kind
 *		of value, instead of [0,1].
 *	2. LESS has a fade() function that uses percentages to makes
 * 	colours (semi)transparent, so using percentages here will
 *		result in more consistent code (same unit in similar situation).
 *	3. Percentages are more intuitive when it comes to transparency and
 * 	opacity since graphic editors like Photoshop and GIMP use them.
 *
 */

.transparent() {.opacity(0);}
.non-transparent() {.opacity(1);}
.half-transparent () {.opacity(.5);}
.opacity () {.non-transparent();}
.opacity (@value) when (isnumber(@value)) and (@value =< 1){
	opacity: @value;
	filter: ~"alpha(opacity="@value*100~")";
	}
.opacity (@value) when (isnumber(@value)) and (@value > 1) and not (ispercentage(@value)){
	// INFO: for the explanation of rule "and not (ispercentage(@value))" refer to the class below.
	opacity: @value/100;
	filter: ~"alpha(opacity="@value~")";
	}
.opacity (@value) when (ispercentage(@value)) {
	// Change the @value from percentage to integer (XX% => XX)
	@integerValue: `parseInt('@{value}')`;
	// Actually the @value should be a number now... but it isn't.
	// LESS think of it as a string so we can't do math here.
	// We'll use a feature of LESS that automatically makes
	// a second value's unit in a sum to be the same as the first one.
	// In our case we need a number so we can divide it by 100.
	opacity: (0 + @integerValue) /100;
	// We don't need a math in filter so no trick.
	filter: ~"alpha(opacity="@integerValue~")";
	
	// BUG: WinLESS compile this with doubled properties unless the rule
	// "and not (ispercentage(@value))" is added in the class above.
	// In Firebug (through the LESS native compiler) those properties
	// aren't doubled, though.
	}

/*
 * Gradient
 * Create a beautiful gradient without images.
 *
 * Pick a type of a gradient you want to have and put colours in
 * brackets. You can put either two or three colours. In the first case
 * the default colour for old browsers will be the same as the first colour provided.
 * In the second case you can set that colour as a third argument.
 *
 * The default class - .gradient - is the same as .vertical-gradient.
 *
 * You can choose from four types of gradients:
 * 1. Vertical - colour will change from top to bottom.
 * 2. Horizontal - change is from left to right.
 * 3. Diagonal - from top-left to bottom-right.
 * 4. Radial - from the centre of an element to its borders.
 *
 * Gradients tend to be tricky. There's no support for this property
 * in older IE, but "filter" comes to the rescue. It can generate
 * only horizontal and vertical gradients, though. Also IE9 has some
 * strange behaviour -> css3wizardry.com/2010/10/29/css-gradients-for-ie9/.
 * To provide the best experience for your visitors you should use
 * gradient generator (refer to resources above) with "IE9 Support" option checked.
 *
 * Resources:
 * -- gradient generator with broad browsers support and some advanced options:
 * 	-> www.colorzilla.com/gradient-editor/
 * -- gradient is a powerful tool - you can generate shapes as a background!
 * 	-> lea.verou.me/css3patterns/
 *
 * Browsers support: almost full
 * Notable lack of support: Opera mini
 * Caution! IE6 - IE8 use filter property that can generate only vertical and
 * horizontal gradients. For the best experience in IE9 use gradient generator
 * mentioned above in the resources.
 *
 */

.gradient (@color1, @color2){
	background: @color1;
	background-image: -moz-linear-gradient(top, @color1 0%, @color2 100%);
	background-image: -webkit-linear-gradient(top, @color1 0%,@color2 100%);
	background-image: -o-linear-gradient(top, @color1 0%,@color2 100%);
	background-image: linear-gradient(to bottom, @color1 0%,@color2 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='@color1', endColorstr='@color2',GradientType=0 );
}
.gradient (@color1, @color2, @color3){
	background: @color3;
	background-image: -moz-linear-gradient(top, @color1 0%, @color2 100%);
	background-image: -webkit-linear-gradient(top, @color1 0%,@color2 100%);
	background-image: -o-linear-gradient(top, @color1 0%,@color2 100%);
	background-image: linear-gradient(to bottom, @color1 0%,@color2 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='@color1', endColorstr='@color2',GradientType=0 );
}
// .vertical-gradient = .gradient
.vertical-gradient (@color1,@color2) {.gradient(@color1,@color2)}
.vertical-gradient (@color1,@color2,@color3) {.gradient(@color1,@color2,@color3)}
.horizontal-gradient (@color1, @color2) {
	background: @color1;
	background-image: -moz-linear-gradient(left, @color1 0%, @color2 100%);
	background-image: -webkit-linear-gradient(left, @color1 0%,@color2 100%);
	background-image: -o-linear-gradient(left, @color1 0%,@color2 100%);
	background-image: linear-gradient(to right, @color1 0%,@color2 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='@color1', endColorstr='@color2',GradientType=1 );
}
.horizontal-gradient (@color1, @color2, @color3) {
	background: @color3;
	background-image: -moz-linear-gradient(left, @color1 0%, @color2 100%);
	background-image: -webkit-linear-gradient(left, @color1 0%,@color2 100%);
	background-image: -o-linear-gradient(left, @color1 0%,@color2 100%);
	background-image: linear-gradient(to right, @color1 0%,@color2 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='@color1', endColorstr='@color2',GradientType=1 );
}
.diagonal-gradient (@color1, @color2) {
	background: @color1;
	background-image: -moz-linear-gradient(-45deg, @color1 0%, @color2 100%);
	background-image: -webkit-linear-gradient(-45deg, @color1 0%,@color2 100%);
	background-image: -o-linear-gradient(-45deg, @color1 0%,@color2 100%);
	background-image: linear-gradient(135deg, @color1 0%,@color2 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='@color1', endColorstr='@color2',GradientType=1 );
	}
.diagonal-gradient (@color1, @color2,@color3) {
	background: @color3;
	background-image: -moz-linear-gradient(-45deg, @color1 0%, @color2 100%);
	background-image: -webkit-linear-gradient(-45deg, @color1 0%,@color2 100%);
	background-image: -o-linear-gradient(-45deg, @color1 0%,@color2 100%);
	background-image: linear-gradient(135deg, @color1 0%,@color2 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='@color1', endColorstr='@color2',GradientType=1 );
	}
.radial-gradient (@color1, @color2) {
	background: @color1;
	background-image: -moz-radial-gradient(center, @color1 0%, @color2 100%);
	background-image: -webkit-radial-gradient(center, @color1 0%,@color2 100%);
	background-image: -o-radial-gradient(center, @color1 0%,@color2 100%);
	background-image: radial-gradient(at center, @color1 0%,@color2 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='@color1', endColorstr='@color2',GradientType=1 );
	}
.radial-gradient (@color1, @color2,@color3) {
	background: @color3;
	background-image: -moz-radial-gradient(center, @color1 0%, @color2 100%);
	background-image: -webkit-radial-gradient(center, @color1 0%,@color2 100%);
	background-image: -o-radial-gradient(center, @color1 0%,@color2 100%);
	background-image: radial-gradient(at center, @color1 0%,@color2 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='@color1', endColorstr='@color2',GradientType=1 );
	}

/*
 * Background-size
 * Scale (or not) your background image.
 * 
 * This property takes following values:
 * -- auto [default] - it does nothing when used alone; when used with a value
 * 	it makes sure that image will keep its aspect ratio while being stretched
 * 	to the required size. (See: examples 3. and 4.)
 * -- contain - scale image to the first border it meets;
 *		it may leave some area uncovered but keeps image's aspect ratio,
 * -- cover - scale image to the second border it meets;
 * 	cover all area but part of an image may not be shown. The image keeps its aspect ratio.
 * -- px, em, % - scale image according to declared value;
 * 	you can declare one value (x-size) or two values for each size.
 *		Using (100%, 100%) stretch the image to cover full area but may not
 *		keep its aspect ratio. When you use percentages keep in mind that XX%
 * 	means XX% of the element size, not XX% of the background image. 
 * 
 * Consider adding background-repeat property to avoid unwanted repetition of background.
 * 
 * Browsers support: IE9+, Fx3.6+, Chrome, Safari, Opera, Opera Mini, Opera Mobile, Android Browser
 * Notable lack of support: IE8-
 *
 * Examples:
 * 1. .background-size(contain);
 * 2. .background-size(cover); 
 * 3. .background-size(70%); 		 // = (70% auto). Image is scaled to take 70% of width
 *									 		 // of the element and it keeps its own aspect ratio.
 * 4. .background-size(auto, 70%) // Image is scaled to take 70% of element's
 * 										 // height and keeps aspect ratio.
 * 5. background-size(70px 7em);  // Size of the background image is now 70px (width) x 7em (height).
 * 6. background-size(70px,7em);  // Same as above. Comma is fine too.
 *
 */
 
.background-size (...) {
	-moz-background-size: @arguments;
	background-size: @arguments;
	}
// A shorthand class.
.bg-size (...) {.background-size(@arguments)}

/*
 * Columns layout
 * 
 * Divide a block of text into columns as seen in newspapers.
 * 
 * Basic usage:
 * Use .columns() class providing in brackets arguments for columns.
 * Non of those arguments are required, but unless you provide one, columns
 * layout won't work. Available arguments:
 * -- integer - declare a column-count. Unless declared, their width will 
 * 	equal to division of the block's width minus column-gaps and declared integer.
 * 	Default value is "auto" which means that width of columns will be determined
 * 	by column-width value.
 * -- width - declare every column width in px, em and % (of containing block).
 * 	Default value is "auto" - column width will be equal to division of the 
 *		block's width and declared column-count
 * 
 * Usage of supporting classes:
 * You can declare the gaps between columns by .column-gap() class that takes
 * width type argument. Default value is "normal" and equals to 1em.
 * 
 * Declare a vertical rule between columns using .column-rule(). It's the same
 * type of declaration as in borders, that is width, style and colour. By default
 * there is no rule.
 *
 * Browsers support: IE10+, Fx, Chrome, Safari, Opera, Opera Mobile, Android Browser
 * Notable lack of support: IE9-, Opera Mini
 * 
 * Example:
 * 1. .column(2, 20px) // Two columns with 20px width.
 * 2. .column(5) // Five columns layout.
 * 3. element {
 * 		.column(100px);						// A 100px width columns
 * 		.column-gap(10px);					// with 10px gap between
 * 		.column-rule(1px solid black);	// and 1px thick, solid, black vertical rule.
 *		}
 *
 */

.columns (...) {
	-webkit-columns: @arguments;
	-moz-columns: @arguments;
	columns: @arguments;
	}
.column-gap (@gap) {
	-webkit-column-gap: @gap;
	-moz-column-gap: @gap;
	column-gap: @gap;
	}
.columns-gap (@gap) {.column-gap(@gap);}
.column-rule (...) {
	-webkit-column-rule: @arguments;
	-moz-column-rule: @arguments;
	column-rule: @arguments;
	}
.columns-rule (...) {.column-rule(@arguments);}
.column-fill (@fill) {
	-webkit-column-fill: @fill;
	-moz-column-fill: @fill;
	column-fill: @fill;
}
.columns-fill (@fill) {.column-fill(@fill);}

/*
 * Transform
 * 2D and 3D transformation of an object.
 * 
 * You can use classes dedicated to specifics transformation, but if you plan
 * to use multiple transformation on an object, use general classes .transform
 * or .transform3d instead. Otherwise the latter transform will override the former.
 * If you want to use some of the 3D transformations, use .transform3d class. It
 * has a 3D specific property transform-style included. You can put both 3D and 2D
 * transformations in .transform3D.
 *
 * Transforms don't affect an object's place in a document and its environment
 * so there's no risk of crashing a layout.
 * 
 * Transformations characteristics:
 * -- Rotate takes one argument and rotate object clockwise by specified angle (in deg).
 * -- Scale takes one or two arguments (x,y). If y is not specified it is assumed that x = y.
 * 	Arguments in interval (0,1) shrink the object. Arguments >1 makes it bigger.
 * -- Skew takes one or two arguments (x,y). If y is not specified it is assumed that y = 0 (no y-skew).
 * 	Arguments must be in deg.
 * -- Translate takes one or two arguments (w,y). If y is not specified it is assumed y = 0 (no y-translate).
 * 	Arguments are in px or em. Translate moves the object by specified value.
 * 
 * Sometimes you might want to control the point that is the relative base of transformations.
 * For that reason use .transform-origin class. That class takes one or two values.
 * First value defines horizontal position of that point, second refers to vertical position.
 * In case you provide only the first value, the second is set to 50%. Default value is (50% 50%).
 * You can use three types of values:
 * -- pixels that place origin point in position according to the top-left corner of an element
 * 	to its bottom-right corner. Negative values allowed - in that case position goes to the left
 *		and top from the top-left corner,
 * -- percentages that are relative to object's width and height. As in px, the original position
 *		is top-left corner (0% 0%), and goes to bottom-right (100% 100%). Negative values does the
 *		same as in px.
 * -- keywords: left / center / right for x-axis and top / center / bottom for y-axis.
 *
 * For 3D transformations you can set a perspective using .perspective() class and putting
 * value in brackets .
 * 	
 * Browsers support: IE9+, Fx3,5+, Chrome, Safari, Opera, Opera Mobile, Android Browser
 * Notable lack of support: IE8-*, Opera Mini
 * * You can use some of the transformation in older IE through filter property.
 *   To generate that property refer to -> css3please.com.
 *   You can also emulate scale property with zoom property.
 * 
 * Examples:
 * 1. .scale(2,.5) // Stretch an object two times and shrink in height by half.
 * 2. .rotate(180deg) // Rotate an object by 180deg.
 * 3. .transform(.scale(2,.5),rotate(180deg)) // Does the combined transformation from examples above.
 * 4. .transform-origin(20% top) // Place the transformation origin at the top, 20% of the object's
 * 										// width to the right from the top-left corner. 
 */

.transform-origin (...) {
	-webkit-transform-origin: @arguments;
	-moz-transform-origin: @arguments;
	-o-transform-origin: @arguments;
	transform-origin: @arguments;
	}
.perspective (...) {
	-webkit-perspective: @arguments;
	-moz-perspective: @arguments;
	-o-perspective: @arguments;
	perspective: @arguments;
	}
.transform (...) {
	-webkit-transform: @arguments;
	-moz-transform: @arguments;
	-o-transform: @arguments;
	transform: @arguments;
	}
.transform3d (...) {
	-webkit-transform: @arguments;
	-webkit-transform-style: preserve-3d;
	-moz-transform: @arguments;
	-moz-transform-style: preserve-3d;
	-o-transform: @arguments;
	-o-transform-style: preserve-3d;
	transform: @arguments;
	transform-style: preserve-3d;
}
.rotate (@rotate) {
	-webkit-transform: rotate(@rotate);
	-moz-transform: rotate(@rotate);
	-o-transform: rotate(@rotate);
	transform: rotate(@rotate);
	}
.rotate3d (@deg1, @deg2:0, @deg3:0){
	-webkit-transform: rotateX(@deg1) rotateY(@deg2) rotateZ(@deg3);
	-webkit-transform-style: preserve-3d;
	-moz-transform: rotateX(@deg1) rotateY(@deg2) rotateZ(@deg3);
	-moz-transform-style: preserve-3d;
	-o-transform: rotateX(@deg1) rotateY(@deg2) rotateZ(@deg3);
	-o-transform-style: preserve-3d;
	transform: rotateX(@deg1) rotateY(@deg2) rotateZ(@deg3);
	transform-style: preserve-3d;
	}
.scale (@scale) {
	-webkit-transform: scale(@scale);
	-moz-transform: scale(@scale);
	-o-transform: scale(@scale);
	transform: scale(@scale);
	}
.scale (@scale1,@scale2) {
	-webkit-transform: scale(@scale1,@scale2);
	-moz-transform: scale(@scale1,@scale2);
	-o-transform: scale(@scale1,@scale2);
	transform: scale(@scale1,@scale2);
	}
.scaleX (@scale) {
	-webkit-transform: scaleX(@scale);
	-moz-transform: scaleX(@scale);
	-o-transform: scaleX(@scale);
	transform: scaleX(@scale);
	}
.scaleY (@scale) {
	-webkit-transform: scaleY(@scale);
	-moz-transform: scaleY(@scale);
	-o-transform: scaleY(@scale);
	transform: scaleY(@scale);
	}
.skew (@skew) {
	-webkit-transform: skew(@skew);
	-moz-transform: skew(@skew);
	-o-transform: skew(@skew);
	transform: skew(@skew);
	}
.skew (@skew1, @skew2) {
	-webkit-transform: skew(@skew1, @skew2);
	-moz-transform: skew(@skew1, @skew2);
	-o-transform: skew(@skew1, @skew2);
	transform: skew(@skew1, @skew2);
	}
.skewX (@skew) {
	-webkit-transform: skewX(@skew);
	-moz-transform: skewX(@skew);
	-o-transform: skewX(@skew);
	transform: skewX(@skew);
	}
.skewY (@skew) {
	-webkit-transform: skewY(@skew);
	-moz-transform: skewY(@skew);
	-o-transform: skewY(@skew);
	transform: skewY(@skew);
	}
.translate (@translate) {
	-webkit-transform: translate(@translate);
	-moz-transform: translate(@translate);
	-o-transform: translate(@translate);
	transform: translate(@translate);
	}
.translate (@translate1, @translate2) {
	-webkit-transform: translate(@translate1, @translate2);
	-moz-transform: translate(@translate1, @translate2);
	-o-transform: translate(@translate1, @translate2);
	transform: translate(@translate1, @translate2);
	}
.translateX (@translate) {
	-webkit-transform: translateX(@translate);
	-moz-transform: translateX(@translate);
	-o-transform: translateX(@translate);
	transform: translateX(@translate);
	}
.translateY (@translate) {
	-webkit-transform: translateY(@translate);
	-moz-transform: translateY(@translate);
	-o-transform: translateY(@translate);
	transform: translateY(@translate);
	}
	
/*
 * Transition
 * Animate a change between different object states.
 * 
 * You can use this class to animate change of up to 5 different properties.
 * If you need more that that (wow!) it's easy to add more of these classes.
 * 
 * Transition takes 4 values:
 * -- transition-property - choose a property you want to animate (margin, colour etc.).
 * 	Default value is "all" which will animate every change that might happen. It's a good
 * 	idea to explicitly write this value if you want to animate everything, though. We can't
 * 	be sure if in the future default state won't change to "none", which will break the whole transition.
 * -- transition-duration - specifies how long transition animation will have to take
 *		until animation is finished. Put values in s (seconds) or ms (milliseconds).
 * 	Required value, since default state is 0s (no animation occurs).
 * -- transition-timing-function - this value describe an acceleration function. It can
 *		really affect overall experience, so it's good idea to pay attention to that.
 * 	Timing function takes 4 number values of keywords: linear, ease, ease-in,
 * 	ease-in-out, ease-out. For further explanation refer to ->developer.mozilla.org/en/CSS/timing-function
 * 	Default value is "ease".
 * -- transition-delay - in seconds or millisecond describes how long transition will wait
 * 	until it occurs after a triggering requirement was met. Default value is 0 - instant animation.
 * 
 * In case you want to put a transformation property into transition effect, use
 * the .transition-transform class. This class is prepared to automatically add
 * many browsers prefixes required in that case. It is also a bit future friendly,
 * but all at all using transitions on transform is very risky.
 * -> http://radiatingstar.com/transition-with-transform-cant-be-future-proof
 * 
 * Usage:
 * For .transition class, put in brackets at least a time value. If you want to animate more than one
 * property or animate everything with different functions, put up to 5 declarations separated with
 * commas. If one of the property you want to animate is "transform" _and_ you want to animate every
 * other properties (or at least not with the same functions), use .transition-transform. As a first
 * value put a time duration for transform property. Do not write this property though. It's auto-added
 * for the first set of values. Add other properties after commas. Refer to the example 3.
 * 
 * Browsers support: IE10+, Fx4+, Chrome, Opera, Safari, Opera Mobile, Android Browser
 * Notable lack of support: IE9-, Fx3.6-, Opera Mini
 * *** Transition provides only a visual effects between states. It's perfectly
 * *** safe to use. Users with older browser just won't see a phase of changing.
 * 
 * Examples:
 * 1. .transition (all 1s); // Animate all properties for 1 second.
 * 2. .transition (background-color 5s, margin 1s linear 5s) // Animate change of background-color for 5s
 * 																			 // and after 5s animate margin change for 1s.
 * 3. .transition-transform (2s linear, padding 3s) // Animate change of transform property (no "transform" declared!)
 * 																 // and padding property.
 */

.transition (@transition1) {
	-webkit-transition: @transition1;
	-moz-transition: @transition1;
	-o-transition: @transition1;
	transition: @transition1;
	}
.transition (@transition1, @transition2) {
	-webkit-transition: @transition1, @transition2;
	-moz-transition: @transition1, @transition2;
	-o-transition: @transition1, @transition2;
	transition: @transition1, @transition2;
	}
.transition (@transition1, @transition2, @transition3) {
	-webkit-transition: @transition1, @transition2, @transition3;
	-moz-transition: @transition1, @transition2, @transition3;
	-o-transition: @transition1, @transition2, @transition3;
	transition: @transition1, @transition2, @transition3;
	}
.transition (@transition1, @transition2, @transition3, @transition4) {
	-webkit-transition: @transition1, @transition2, @transition3, @transition4;
	-moz-transition: @transition1, @transition2, @transition3, @transition4;
	-o-transition: @transition1, @transition2, @transition3, @transition4;
	transition: @transition1, @transition2, @transition3, @transition4;
	}
.transition (@transition1, @transition2, @transition3, @transition4, @transition5) {
	-webkit-transition: @transition1, @transition2, @transition3, @transition4, @transition5;
	-moz-transition: @transition1, @transition2, @transition3, @transition4, @transition5;
	-o-transition: @transition1, @transition2, @transition3, @transition4, @transition5;
	transition: @transition1, @transition2, @transition3, @transition4, @transition5;
	}
.transition-transform (@transformArguments) {
	-webkit-transition: -webkit-transform @transformArguments;
	-moz-transition: -moz-transform @transformArguments;
	-o-transition: -o-transform @transformArguments;
	transition: transform @transformArguments;
	}
.transition-transform (@transformArguments, @transition1) {
	-webkit-transition: -webkit-transform @transformArguments, @transition1;
	-moz-transition: -moz-transform @transformArguments, @transition1;
	-o-transition: -o-transform @transformArguments, @transition1;
	transition: transform @transformArguments, @transition1;
	}
.transition-transform (@transformArguments, @transition1, @transition2) {
	-webkit-transition: -webkit-transform @transformArguments, @transition1, @transition2;
	-moz-transition: -moz-transform @transformArguments, @transition1, @transition2;
	-o-transition: -o-transform @transformArguments, @transition1, @transition2;
	transition: transform @transformArguments, @transition1, @transition2;
	}
.transition-transform (@transformArguments, @transition1, @transition2, @transition3) {
	-webkit-transition: -webkit-transform @transformArguments, @transition1, @transition2, @transition3;
	-moz-transition: -moz-transform @transformArguments, @transition1, @transition2, @transition3;
	-o-transition: -o-transform @transformArguments, @transition1, @transition2, @transition3;
	transition: transform @transformArguments, @transition1, @transition2, @transition3;
	}
.transition-transform (@transformArguments, @transition1, @transition2, @transition3, @transition4) {
	-webkit-transition: -webkit-transform @transformArguments, @transition1, @transition2, @transition3, @transition4;
	-moz-transition: -moz-transform @transformArguments, @transition1, @transition2, @transition3, @transition4;
	-o-transition: -o-transform @transformArguments, @transition1, @transition2, @transition3, @transition4;
	transition: transform @transformArguments, @transition1, @transition2, @transition3, @transition4;
	}
.transition-transform (@transformArguments, @transition1, @transition2, @transition3, @transition4, @transition5) {
	-webkit-transition: -webkit-transform @transformArguments, @transition1, @transition2, @transition3, @transition4, @transition5;
	-moz-transition: -moz-transform @transformArguments, @transition1, @transition2, @transition3, @transition4, @transition5;
	-o-transition: -o-transform @transformArguments, @transition1, @transition2, @transition3, @transition4, @transition5;
	transition: transform @transformArguments, @transition1, @transition2, @transition3, @transition4, @transition5;
	}

/*
 * Animations
 * 
 * Create an awesome animation!
 * 
 * This class takes from two to five properties:
 * -- animation-name [required] - declare your @keyframes animation name. See below
 * 	for an easy way to make @keyframes!
 * -- animation-duration [required] - declare how long will it take for an animation
 * 	to reach end. Value in seconds (s) or milliseconds (ms).
 * -- timing-function - it's the same property as in transition. Refer to
 * 	that topic for further explanation.
 * -- iteration-count - how many times an animation will repeat. It takes integer
 * 	or "infinite" keyword (for infinite repetition). Default value is 1.
 * -- direction - indicates whether the animation should play in reverse on
 * 	alternate cycles. Refer to ->developer.mozilla.org/en/CSS/animation-direction
 * 	for better explanation. To declare a direction use normal [default value],
 * 	alternate, reverse or alternate-reverse keyword.
 * 
 * Resources:
 * -- developer.mozilla.org/en/CSS/animation
 *
 * Creating @keyframes:
 * Write in your .less file:
 * *** @import 'animationX.less';
 * where X stands for a number between 1 and 5. Then create a class
 * *** .animationX () {}
 * and in {} write declarations you normally write in @keyframes.
 * Then just put an .animation(animationX [other animation properties]) class in your element.
 * That's all!
 *
 * Example:
 * .toBeAnimated {
 * 		// Animation with every possible value declared. //
 *			.animation(animation1 5s linear 3s infinite alternate);
 *			}
 * // Importing prefixed @keyframes for animation1.
 * @import 'animation1';
 *
 * // Declaring @keyframes for animation. Only once! 
 * .animation1() {
 *			from (margin-top: 3px;)
 *			to (margin-top: 333px;)
 *			}
 *
 */

.animation (...) {
	-webkit-animation: @arguments;
	-moz-animation: @arguments;
	-o-animation: @arguments;
	animation: @arguments;
	}
.animate (...) {.animation(@arguments);}
.anime (...) {.animation(@arguments);}