KNACSS/less/_01-base.less

/* ----------------------------- */
/* ==reset                       */
/* ----------------------------- */

/* base font-size corresponds to 10px and is adapted to rem unit */
html {
	font-size: 62.5%;
}
body {
	background-color: @basebg;
	color: @basecolor;
	font-family: @fontstack1;
	font-size: unit((@basefont / 10), em);
	line-height: @lh; // adapt to your design
}

/* font-sizing for content */
/* preserve vertical-rythm, thanks to http://soqr.fr/vertical-rhythm/ */
p,
ul,
ol,
dl,
blockquote,
pre,
td,
th,
label,
textarea,
caption,
details, 
figure, 
hgroup {
	margin-top: .75em;
	margin-bottom: 0;
	line-height: @lh;
}
h1, .h1-like {
	.flow(@h1-size);
}
h2, .h2-like {
	.flow(@h2-size);
}
h3, .h3-like {
	.flow(@h3-size);
}
h4, .h4-like {
	.flow(@h4-size);
}
h5, .h5-like {
	.flow(@h5-size);
}
h6, .h6-like {
	.flow(@h6-size);
}

/* alternate font-sizing */
.smaller {
	.em(@basefont - 4);
}
.small {
	.em(@basefont - 2);
}
.big {
	.em(@basefont + 2);
}
.bigger {
	.em(@basefont + 4);
}
.biggest {
	.em(@basefont + 6);
}

/* soft reset */
html,
body {
	margin: 0;
	padding: 0;
}
ul,
ol {
	padding-left: 2em;
}
ul.unstyled {
	list-style: none;
}
code, 
pre,
samp,
kbd {
	white-space: pre-wrap;
	font-family: @fontstack2;
	line-height: 1;
}
code, kbd, mark {
	border-radius: 2px;
}
em {
	font-style: italic;
}
strong {
	font-weight: bold;
}
kbd {
	padding: 0 2px;
	border: 1px solid #999;
}
code {
	padding: 2px 4px;
	background: rgba(0,0,0,.04);
	color: #b11; 
}
mark {
	padding:2px 4px;
	background: #ff0;
}
table { margin-bottom: 1.5em; }

/* avoid top margins on first content element */
p, ul, ol, dl,
blockquote, pre,
h1, h2, h3, h4, h5, h6 {
	&:first-child {
		margin-top: 0;
	}
}

/* avoid margins on nested elements */
li p,
li ul,
li ol {
	margin-top: 0;
	margin-bottom: 0;
}

/* max values */
img, table, td, blockquote, code, pre, textarea, input, video {
	max-width: 100%;
}

/* pictures */
img {
	vertical-align: middle;
}
/* Google Gmap3 bug fix on images */
:not(.gm-style) img {
	height: auto !important;
}
.ie678 .gm-style img {
	height: 100%;  /* IE678 hack */
}
.gm-style img,
.gmnoscreen img,
.gmnoprint img {
	max-width: none !important;
}

a img { border: 0; }

/* scripts */
body > script {display: none !important;}

/* skip-links */
.skip-links {
	position: absolute;

	a {
		position: absolute;
		left: -7000px;
		padding: 0.5em;
		background: black;
		color: white;
		text-decoration: none;
	
		&:focus {
			position: static;
		}
	}
}

/* ----------------------------- */
/* ==layout and modules          */
/* ----------------------------- */

/* switching box model for all elements */
* {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
}

/* float layout */
/* module, gains superpower "BFC" Block Formating Context */
.mod { 
	overflow: hidden;
}

/* blocks that needs to be placed under floats */
.clear,
.line,
.row {
	clear: both;
}

/* blocks that must contain floats */
.clearfix:after,
.line:after,
.mod:after {
	content: "";
	display: table;
	clear: both;
}

/* table layout */
.row {
	display: table;
	table-layout: fixed;
	width: 100%;
}
.row > *,
.col {
	display: table-cell;
	vertical-align: top;
}

/* inline-block */
.inbl {
	display: inline-block;
	vertical-align: top;
}


/* alignments (blocks and inline) */
/* ------------------------------ */

/* left elements */
.left {
	float: left;
}
img.left {
	margin-right: 1em;
}

/* right elements */
.right {
	float: right;
}
img.right {
	margin-left: 1em;
}

img.left, img.right {
	margin-bottom: 5px;
}

.center    { margin-left: auto; margin-right: auto; }
.txtleft   { text-align: left; }
.txtright  { text-align: right; }
.txtcenter { text-align: center; }


/* blocks widths (percentage and pixels) */
.w10    { width: 10%; }
.w20    { width: 20%; }
.w25    { width: 25%; }
.w30    { width: 30%; }
.w33    { width: 33.3333%; }
.w40    { width: 40%; }
.w50    { width: 50%; }
.w60    { width: 60%; }
.w66    { width: 66.6666%; }
.w70    { width: 70%; }
.w75    { width: 75%; }
.w80    { width: 80%; }
.w90    { width: 90%; }
.w100   { width: 100%; }

.w50p   { width: 50px; }
.w100p  { width: 100px; }
.w150p  { width: 150px; }
.w200p  { width: 200px; }
.w300p  { width: 300px; }
.w400p  { width: 400px; }
.w500p  { width: 500px; }
.w600p  { width: 600px; }
.w700p  { width: 700px; }
.w800p  { width: 800px; }
.w960p  { width: 960px; }
.mw960p { max-width: 960px; }
.w1140p  { width: 1140px; }
.mw1140p { max-width: 1140px; }

/* spacing helpers
p,m = padding,margin
a,t,r,b,l = all,top,right,bottom,left
s,m,l,n = small(10px),medium(20px),large(30px),none(0)
source https://github.com/stubbornella/oocss/blob/master/core/spacing/space.css
*/
.m-reset, .ma0 { margin: 0; }
.p-reset, .pa0 { padding: 0; }
.ma1, .mas { margin: @smallvalue; }
.ma2, .mam { margin: @mediumvalue; }
.ma3, .mal { margin: @largevalue; }
.pa1, .pas { padding: @smallvalue; }
.pa2, .pam { padding: @mediumvalue; }
.pa3, .pal { padding: @largevalue; }

.mt0, .mtn { margin-top: 0; }
.mt1, .mts { margin-top: @smallvalue; }
.mt2, .mtm { margin-top: @mediumvalue; }
.mt3, .mtl { margin-top: @largevalue; }
.mr0, .mrn { margin-right: 0; }
.mr1, .mrs { margin-right: @smallvalue; }
.mr2, .mrm { margin-right: @mediumvalue; }
.mr3, .mrl { margin-right: @largevalue; }
.mb0, .mbn { margin-bottom: 0; }
.mb1, .mbs { margin-bottom: @smallvalue; }
.mb2, .mbm { margin-bottom: @mediumvalue; }
.mb3, .mbl { margin-bottom: @largevalue; }
.ml0, .mln { margin-left: 0; }
.ml1, .mls { margin-left: @smallvalue; }
.ml2, .mlm { margin-left: @mediumvalue; }
.ml3, .mll { margin-left: @largevalue; }

.pt0, .ptn { padding-top: 0; }
.pt1, .pts { padding-top: @smallvalue; }
.pt2, .ptm { padding-top: @mediumvalue; }
.pt3, .ptl { padding-top: @largevalue; }
.pr0, .prn { padding-right: 0; }
.pr1, .prs { padding-right: @smallvalue; }
.pr2, .prm { padding-right: @mediumvalue; }
.pr3, .prl { padding-right: @largevalue; }
.pb0, .pbn { padding-bottom: 0; }
.pb1, .pbs { padding-bottom: @smallvalue; }
.pb2, .pbm { padding-bottom: @mediumvalue; }
.pb3, .pbl { padding-bottom: @largevalue; }
.pl0, .pln { padding-left: 0; }
.pl1, .pls { padding-left: @smallvalue; }
.pl2, .plm { padding-left: @mediumvalue; }
.pl3, .pll { padding-left: @largevalue; }

/* hiding content */
.visually-hidden {
	position: absolute;
	left: -7000px;
	overflow: hidden;
}
[dir=rtl] .visually-hidden {
	left: auto;
	right: -7000px;
}

/* hidden on desktop */
.desktop-hidden { display: none; } 
/* hidden on mobile */
.mobile-hidden { display: block; } 


/* ----------------------------- */
/* ==iefix                       */
/* ----------------------------- */

/* Make sure you are using Conditional Classes in your HTML */
/* see : http://www.alsacreations.com/astuce/lire/988-classes-conditionnelles-HTML.html */

.ie678 h1, .ie678 .h1-like {
	.em(@h1-size);
}
.ie678 h2, .ie678 .h2-like {
	.em(@h2-size);
}
.ie678 h3, .ie678 .h3-like {
	.em(@h3-size);
}
.ie678 h4, .ie678 .h4-like {
	.em(@h4-size);
}
.ie678 h5, .ie678 .h5-like {
	.em(@h5-size);
}
.ie678 h6, .ie678 .h6-like {
	.em(@h6-size);
}

/* haslayout for IE6/IE7 */
.ie67 .clearfix,
.ie67 .line,
.ie67 .mod,
.ie67 .row,
.ie67 .col {
	zoom: 1;
}

/* inline-block and table-cell for IE6/IE7 */
/* warning: .col needs width on IE6/IE7 */
.ie67 .btn,
.ie67 .col,
.ie67 .inbl {
	display: inline;
	zoom: 1;
}
.ie8 img {
	width: auto; /* @bugfix for IE8 */
}

/* Active box-sizing for IE6/IE7 */
/* @source https://github.com/Schepp/box-sizing-polyfill */
/*
.ie67 * {
	behavior: url(/inc/box-sizing-polyfill/boxsizing.htc);
}
*/

/* ----------------------------- */
/* ==print                       */
/* ----------------------------- */

/* quick print reset */
@media print {
	p,
	blockquote {
		orphans: 2;
		widows: 2;
	}
	blockquote,
	ul,
	ol {
		page-break-inside: avoid;
	}
	h1,
	h2,
	h3,
	caption {
		page-break-after: avoid;
	}
}

/* debug helper */
.knacss-debug {
	background: pink;
	outline: 3px solid maroon;
}

/* orientation iOS font-size fix */
@media (orientation: landscape) and (max-device-width: @smallscreen) {
	html,
	body {
		-webkit-text-size-adjust: 100%;
	}
}