/* ---------------------------------- */
/* ==Grids                            */
/* ---------------------------------- */

// WARNING : KNACSS grids are flexbox based and only supported by IE10+
// Tuto : http://www.alsacreations.com/tuto/lire/1659-une-grille-responsive-avec-flexbox-et-LESS.html
// Demo : http://codepen.io/raphaelgoetter/pen/zxBMLW

// Usage in vanilla CSS:
// - <div class="grid-4"> for an equal fourth columns grid container
// - <div class="grid-2-1"> for an uneven columns grid container

// Usage with preprocessors : if you're using LESS, you can config grids variables :
// n = number of columns (default = 4)
// example : .grid-perso { .grid(12); }
// ... or uneven grids :
// left = left ratio column (default = 2) / right = right ratio column (default = 1)
// example : .grid-perso { .uneven-grid(2, 1); }

[class*="grid-"] {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: space-between;
	margin-left: -@gutter;
}

[class*="grid-"] > * {
	flex: 0 0 auto;
	display: block; /* IE fix */
	width: ~'calc(100% * 1 / @{number} - @{gutter})';
	margin-left: @gutter;
}

// LESS mixins for *equal* columns grid container
// example : .grid-perso { .grid(12); }
.grid(@number:@number, @gutter:@gutter) { 
 & > * {
	  width: ~'calc(100% * 1 / @{number} - @{gutter})';
	}
	& > .flex-item-double {
		width: ~'calc(100% * 2 / @{number} - @{gutter})';
	}
	@media (min-width: (@tiny-screen + 1)) and (max-width: @small-screen) {
		& > * {
			width: ~'calc(100% * 1 / 2 - @{gutter})';
		}
		& > .flex-item-double {
			width: ~'calc(100% - @{gutter})';
		}
	}
	@media (max-width: @tiny-screen) {
		& > * {
			width: ~'calc(100% - @{gutter})';
		}
		& > .flex-item-double {
			width: ~'calc(100% - @{gutter})';
		}
	}
}

// Examples : will be compiled in CSS

.grid-2 {
	.grid(2);
}

.grid-3 {
	.grid(3);
}

.grid-4 {
	.grid(4);
}

.grid-5 {
	.grid(5);
}

.grid-6 {
	.grid(6);
}

.grid-7 {
	.grid(7);
}

.grid-8 {
	.grid(8);
}

.grid-10 {
	.grid(10);
}

.grid-12 {
	.grid(12);
}

// LESS mixins for *unequal* columns grid container
// example : .grid-perso { .uneven-grid(2, 1); }
 .uneven-grid(@left:@left, @right:@right, @gutter:@gutter) { 
	& > *:nth-child(odd) {
		@size: (@left / (@left + @right)) * 100%;
		width: ~'calc(@{size} - @{gutter})';
	}
	& > *:nth-child(even) {
		@size: (@right / (@left + @right)) * 100%;
		width: ~'calc(@{size} - @{gutter})';
	}
	@media (max-width: @tiny-screen) {
		& > *:nth-child(n) {
			width: ~'calc(100% - @{gutter})';
		}
	}
}


// Examples : will be compiled in CSS

.grid-2-1 {
	.uneven-grid(2,1);
}

.grid-1-2 {
	.uneven-grid(1,2);
}

.grid-3-1 {
	.uneven-grid(3,1);
}

.grid-1-3 {
	.uneven-grid(1,3);
}

.grid-3-2 {
	.uneven-grid(3,2);
}

.grid-2-3 {
	.uneven-grid(2,3);
}

.grid-4-1 {
	.uneven-grid(4,1);
}

.grid-1-4 {
	.uneven-grid(1,4);
}