CodePen

HTML

            
              .main-container.fixed-width
	.row
		%h1.span-12
			12 Column Calc() Responsive Grid
			%small (Incomplete)
	.row
		%p.span-8
			This is a responsive grid that uses 
			%code calc()
			(CSS3 Function) to set the widths of the sections for supporting browsers. 
			%a{:href => "http://caniuse.com/#feat=calc", :title => "Can I Use Calc() as CSS unit value"} Non-supporting browsers 
			(Opera, Android Browser, <abbr title="Internet Explorer 8">IE8</abbr> on down) will get a fallback stylesheet (Opera and Android Browser through a Modernizr test or a conditional CSS class "<code>no-csscalc</code>", <abbr title="Internet Explorer 8">IE8</abbr> on down through 
			%a{:href => "http://css-tricks.com/how-to-create-an-ie-only-stylesheet/", :title => "How To Create an IE-Only Stylesheet"} Conditional Comments
			) with percentage widths (and <code>DHTML</code> expression widths for <abbr title="Internet Explorer 7">IE7</abbr>).
.main-container
	.row
		.span-12
			.width-unit
	.row
		.span-1
			.width-unit
		.span-11
			.width-unit
	.row
		.span-2
			.width-unit
		.span-10
			.width-unit
	.row
		.span-3
			.width-unit
		.span-9
			.width-unit
	.row
		.span-4
			.width-unit
		.span-8
			.width-unit
	.row
		.span-5
			.width-unit
		.span-7
			.width-unit
	.row
		.span-6
			.width-unit
		.span-6
			.width-unit
	.row
		.span-1.suffix-11
			.width-unit
	.row
		.span-1.prefix-1.suffix-10
			.width-unit
	.row
		.span-1.prefix-2.suffix-9
			.width-unit
	.row
		.span-1.prefix-3.suffix-8
			.width-unit
	.row
		.span-1.prefix-4.suffix-7
			.width-unit
	.row
		.span-1.prefix-5.suffix-6
			.width-unit
	.row
		.span-1.prefix-6.suffix-5
			.width-unit
	.row
		.span-1.prefix-7.suffix-4
			.width-unit
	.row
		.span-1.prefix-8.suffix-3
			.width-unit
	.row
		.span-1.prefix-9.suffix-2
			.width-unit
	.row
		.span-1.prefix-10.suffix-1
			.width-unit
	.row
		.span-1.prefix-11
			.width-unit
	.row
		.span-6
			.row
				.span-6
					.width-unit
				.span-6
					.width-unit
		.span-6
			.row
				.span-4
					.width-unit
				.span-4
					.width-unit
				.span-4
					.width-unit
	.underlay
		.row
			- (1..12).each do
				.span-1
					%div
            
          
!

↑ Insert the most common viewport meta tag

CSS

            
              /* SCSS Variables */
$siteWidth: 960px;
$gutterWidth: 20px;
$halfGutterWidth: ($gutterWidth/2);

/* Core Grid */
.main-container {
    margin: 0 auto;
    width: $siteWidth;
}
.row {
    clear: both;
    margin-left: -$halfGutterWidth; /* In this case 10px */
    width: $siteWidth;
    .row {
        margin-left: -$gutterWidth; /* In this case 20px */
        width: auto;
    }
    &:before,
    &:after {
        content: "";
        display: table;
    }
    &:after {
        clear: both;
    }
}
[class*="span-"] { /* I included prefixed versions on box sizing because Prefixer takes a second to load and didn't feel like putting the JS script for the width detection in a document load function */
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
    float: left;
    margin: 0;
    padding-left: $gutterWidth; /* In this case 20px */
}
.span-1  { width: calc(100% / 12); }
.span-2  { width: calc(100% / 12 *  2); }
.span-3  { width: calc(100% / 12 *  3); }
.span-4  { width: calc(100% / 12 *  4); }
.span-5  { width: calc(100% / 12 *  5); }
.span-6  { width: calc(100% / 12 *  6); }
.span-7  { width: calc(100% / 12 *  7); }
.span-8  { width: calc(100% / 12 *  8); }
.span-9  { width: calc(100% / 12 *  9); }
.span-10 { width: calc(100% / 12 * 10); }
.span-11 { width: calc(100% / 12 * 11); }
.span-12 { width: calc(100%); }

.suffix-1  { margin-right: calc(100% / 12 *  1); }
.suffix-2  { margin-right: calc(100% / 12 *  2); }
.suffix-3  { margin-right: calc(100% / 12 *  3); }
.suffix-4  { margin-right: calc(100% / 12 *  4); }
.suffix-5  { margin-right: calc(100% / 12 *  5); }
.suffix-6  { margin-right: calc(100% / 12 *  6); }
.suffix-7  { margin-right: calc(100% / 12 *  7); }
.suffix-8  { margin-right: calc(100% / 12 *  8); }
.suffix-9  { margin-right: calc(100% / 12 *  9); }
.suffix-10 { margin-right: calc(100% / 12 * 10); }
.suffix-11 { margin-right: calc(100% / 12 * 11); }

.prefix-1  { margin-left: calc(100% / 12 *  1); }
.prefix-2  { margin-left: calc(100% / 12 *  2); }
.prefix-3  { margin-left: calc(100% / 12 *  3); }
.prefix-4  { margin-left: calc(100% / 12 *  4); }
.prefix-5  { margin-left: calc(100% / 12 *  5); }
.prefix-6  { margin-left: calc(100% / 12 *  6); }
.prefix-7  { margin-left: calc(100% / 12 *  7); }
.prefix-8  { margin-left: calc(100% / 12 *  8); }
.prefix-9  { margin-left: calc(100% / 12 *  9); }
.prefix-10 { margin-left: calc(100% / 12 * 10); }
.prefix-11 { margin-left: calc(100% / 12 * 11); }

[class*="push_"],
[class*="pull_"] {
  position: relative;
}
.push-1  { left: calc(100% / 12 *  1); }
.push-2  { left: calc(100% / 12 *  2); }
.push-3  { left: calc(100% / 12 *  3); }
.push-4  { left: calc(100% / 12 *  4); }
.push-5  { left: calc(100% / 12 *  5); }
.push-6  { left: calc(100% / 12 *  6); }
.push-7  { left: calc(100% / 12 *  7); }
.push-8  { left: calc(100% / 12 *  8); }
.push-9  { left: calc(100% / 12 *  9); }
.push-10 { left: calc(100% / 12 * 10); }
.push-11 { left: calc(100% / 12 * 11); }

.pull-1  { left: calc(100% / 12 *  1 * -1); }
.pull-2  { left: calc(100% / 12 *  2 * -1); }
.pull-3  { left: calc(100% / 12 *  3 * -1); }
.pull-4  { left: calc(100% / 12 *  4 * -1); }
.pull-5  { left: calc(100% / 12 *  5 * -1); }
.pull-6  { left: calc(100% / 12 *  6 * -1); }
.pull-7  { left: calc(100% / 12 *  7 * -1); }
.pull-8  { left: calc(100% / 12 *  8 * -1); }
.pull-9  { left: calc(100% / 12 *  9 * -1); }
.pull-10 { left: calc(100% / 12 * 10 * -1); }
.pull-11 { left: calc(100% / 12 * 11 * -1); }


/* Visual Styling */
.main-container {
    box-shadow: 0 0 5px 0 rgba(0, 0, 0, 0.4);
    position: relative;
}
.row {
    margin-bottom: 16px;
    margin-top: 16px;
    .row {
        background-color: transparent;
        margin-bottom: 0;
        margin-top: 0;
    }
}
[class*="span-"] .width-unit {
    background-color: rgba(255, 255, 255, 0.7);
    height: 40px;
    line-height: 40px;
    text-align: center;
}

/* Responsive Underlay Styling */
.underlay {
    background-color: green;
    left: 0;
    min-height: 100%;
    position: absolute;
    top: 0;
    width: calc(#{$siteWidth});
    z-index: -1;
    .row {
        margin-bottom: 0;
        margin-top: 0;
    }
}
.underlay [class*="span-"] div {
    background-color: rgba(0, 0, 0, 0.2);
}


/* This for the description at top */
.main-container.fixed-width {
    box-shadow: none;
    width: 980px;
}
            
          
!
? ?
? ?
Must be a valid URL.
+ add another resource
via CSS Lint

JS

            
              /* Modernizr 2.6.2 (Custom Build) | MIT & BSD
 * Build: http://modernizr.com/download/#-fontface-backgroundsize-borderimage-borderradius-boxshadow-flexbox-flexboxlegacy-hsla-multiplebgs-opacity-rgba-textshadow-cssanimations-csscolumns-generatedcontent-cssgradients-cssreflections-csstransforms-csstransforms3d-csstransitions-applicationcache-canvas-canvastext-draganddrop-hashchange-history-audio-video-indexeddb-input-inputtypes-localstorage-postmessage-sessionstorage-websockets-websqldatabase-webworkers-geolocation-inlinesvg-smil-svg-svgclippaths-touch-webgl-shiv-cssclasses-teststyles-testprop-testallprops-hasevent-prefixes-domprefixes-css_calc-load
 */
;window.Modernizr=function(a,b,c){function C(a){j.cssText=a}function D(a,b){return C(n.join(a+";")+(b||""))}function E(a,b){return typeof a===b}function F(a,b){return!!~(""+a).indexOf(b)}function G(a,b){for(var d in a){var e=a[d];if(!F(e,"-")&&j[e]!==c)return b=="pfx"?e:!0}return!1}function H(a,b,d){for(var e in a){var f=b[a[e]];if(f!==c)return d===!1?a[e]:E(f,"function")?f.bind(d||b):f}return!1}function I(a,b,c){var d=a.charAt(0).toUpperCase()+a.slice(1),e=(a+" "+p.join(d+" ")+d).split(" ");return E(b,"string")||E(b,"undefined")?G(e,b):(e=(a+" "+q.join(d+" ")+d).split(" "),H(e,b,c))}function J(){e.input=function(c){for(var d=0,e=c.length;d<e;d++)u[c[d]]=c[d]in k;return u.list&&(u.list=!!b.createElement("datalist")&&!!a.HTMLDataListElement),u}("autocomplete autofocus list placeholder max min multiple pattern required step".split(" ")),e.inputtypes=function(a){for(var d=0,e,f,h,i=a.length;d<i;d++)k.setAttribute("type",f=a[d]),e=k.type!=="text",e&&(k.value=l,k.style.cssText="position:absolute;visibility:hidden;",/^range$/.test(f)&&k.style.WebkitAppearance!==c?(g.appendChild(k),h=b.defaultView,e=h.getComputedStyle&&h.getComputedStyle(k,null).WebkitAppearance!=="textfield"&&k.offsetHeight!==0,g.removeChild(k)):/^(search|tel)$/.test(f)||(/^(url|email)$/.test(f)?e=k.checkValidity&&k.checkValidity()===!1:e=k.value!=l)),t[a[d]]=!!e;return t}("search tel url email datetime date month week time datetime-local number range color".split(" "))}var d="2.6.2",e={},f=!0,g=b.documentElement,h="modernizr",i=b.createElement(h),j=i.style,k=b.createElement("input"),l=":)",m={}.toString,n=" -webkit- -moz- -o- -ms- ".split(" "),o="Webkit Moz O ms",p=o.split(" "),q=o.toLowerCase().split(" "),r={svg:"http://www.w3.org/2000/svg"},s={},t={},u={},v=[],w=v.slice,x,y=function(a,c,d,e){var f,i,j,k,l=b.createElement("div"),m=b.body,n=m||b.createElement("body");if(parseInt(d,10))while(d--)j=b.createElement("div"),j.id=e?e[d]:h+(d+1),l.appendChild(j);return f=["&#173;",'<style id="s',h,'">',a,"</style>"].join(""),l.id=h,(m?l:n).innerHTML+=f,n.appendChild(l),m||(n.style.background="",n.style.overflow="hidden",k=g.style.overflow,g.style.overflow="hidden",g.appendChild(n)),i=c(l,a),m?l.parentNode.removeChild(l):(n.parentNode.removeChild(n),g.style.overflow=k),!!i},z=function(){function d(d,e){e=e||b.createElement(a[d]||"div"),d="on"+d;var f=d in e;return f||(e.setAttribute||(e=b.createElement("div")),e.setAttribute&&e.removeAttribute&&(e.setAttribute(d,""),f=E(e[d],"function"),E(e[d],"undefined")||(e[d]=c),e.removeAttribute(d))),e=null,f}var a={select:"input",change:"input",submit:"form",reset:"form",error:"img",load:"img",abort:"img"};return d}(),A={}.hasOwnProperty,B;!E(A,"undefined")&&!E(A.call,"undefined")?B=function(a,b){return A.call(a,b)}:B=function(a,b){return b in a&&E(a.constructor.prototype[b],"undefined")},Function.prototype.bind||(Function.prototype.bind=function(b){var c=this;if(typeof c!="function")throw new TypeError;var d=w.call(arguments,1),e=function(){if(this instanceof e){var a=function(){};a.prototype=c.prototype;var f=new a,g=c.apply(f,d.concat(w.call(arguments)));return Object(g)===g?g:f}return c.apply(b,d.concat(w.call(arguments)))};return e}),s.flexbox=function(){return I("flexWrap")},s.flexboxlegacy=function(){return I("boxDirection")},s.canvas=function(){var a=b.createElement("canvas");return!!a.getContext&&!!a.getContext("2d")},s.canvastext=function(){return!!e.canvas&&!!E(b.createElement("canvas").getContext("2d").fillText,"function")},s.webgl=function(){return!!a.WebGLRenderingContext},s.touch=function(){var c;return"ontouchstart"in a||a.DocumentTouch&&b instanceof DocumentTouch?c=!0:y(["@media (",n.join("touch-enabled),("),h,")","{#modernizr{top:9px;position:absolute}}"].join(""),function(a){c=a.offsetTop===9}),c},s.geolocation=function(){return"geolocation"in navigator},s.postmessage=function(){return!!a.postMessage},s.websqldatabase=function(){return!!a.openDatabase},s.indexedDB=function(){return!!I("indexedDB",a)},s.hashchange=function(){return z("hashchange",a)&&(b.documentMode===c||b.documentMode>7)},s.history=function(){return!!a.history&&!!history.pushState},s.draganddrop=function(){var a=b.createElement("div");return"draggable"in a||"ondragstart"in a&&"ondrop"in a},s.websockets=function(){return"WebSocket"in a||"MozWebSocket"in a},s.rgba=function(){return C("background-color:rgba(150,255,150,.5)"),F(j.backgroundColor,"rgba")},s.hsla=function(){return C("background-color:hsla(120,40%,100%,.5)"),F(j.backgroundColor,"rgba")||F(j.backgroundColor,"hsla")},s.multiplebgs=function(){return C("background:url(https://),url(https://),red url(https://)"),/(url\s*\(.*?){3}/.test(j.background)},s.backgroundsize=function(){return I("backgroundSize")},s.borderimage=function(){return I("borderImage")},s.borderradius=function(){return I("borderRadius")},s.boxshadow=function(){return I("boxShadow")},s.textshadow=function(){return b.createElement("div").style.textShadow===""},s.opacity=function(){return D("opacity:.55"),/^0.55$/.test(j.opacity)},s.cssanimations=function(){return I("animationName")},s.csscolumns=function(){return I("columnCount")},s.cssgradients=function(){var a="background-image:",b="gradient(linear,left top,right bottom,from(#9f9),to(white));",c="linear-gradient(left top,#9f9, white);";return C((a+"-webkit- ".split(" ").join(b+a)+n.join(c+a)).slice(0,-a.length)),F(j.backgroundImage,"gradient")},s.cssreflections=function(){return I("boxReflect")},s.csstransforms=function(){return!!I("transform")},s.csstransforms3d=function(){var a=!!I("perspective");return a&&"webkitPerspective"in g.style&&y("@media (transform-3d),(-webkit-transform-3d){#modernizr{left:9px;position:absolute;height:3px;}}",function(b,c){a=b.offsetLeft===9&&b.offsetHeight===3}),a},s.csstransitions=function(){return I("transition")},s.fontface=function(){var a;return y('@font-face {font-family:"font";src:url("https://")}',function(c,d){var e=b.getElementById("smodernizr"),f=e.sheet||e.styleSheet,g=f?f.cssRules&&f.cssRules[0]?f.cssRules[0].cssText:f.cssText||"":"";a=/src/i.test(g)&&g.indexOf(d.split(" ")[0])===0}),a},s.generatedcontent=function(){var a;return y(["#",h,"{font:0/0 a}#",h,':after{content:"',l,'";visibility:hidden;font:3px/1 a}'].join(""),function(b){a=b.offsetHeight>=3}),a},s.video=function(){var a=b.createElement("video"),c=!1;try{if(c=!!a.canPlayType)c=new Boolean(c),c.ogg=a.canPlayType('video/ogg; codecs="theora"').replace(/^no$/,""),c.h264=a.canPlayType('video/mp4; codecs="avc1.42E01E"').replace(/^no$/,""),c.webm=a.canPlayType('video/webm; codecs="vp8, vorbis"').replace(/^no$/,"")}catch(d){}return c},s.audio=function(){var a=b.createElement("audio"),c=!1;try{if(c=!!a.canPlayType)c=new Boolean(c),c.ogg=a.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/,""),c.mp3=a.canPlayType("audio/mpeg;").replace(/^no$/,""),c.wav=a.canPlayType('audio/wav; codecs="1"').replace(/^no$/,""),c.m4a=(a.canPlayType("audio/x-m4a;")||a.canPlayType("audio/aac;")).replace(/^no$/,"")}catch(d){}return c},s.localstorage=function(){try{return localStorage.setItem(h,h),localStorage.removeItem(h),!0}catch(a){return!1}},s.sessionstorage=function(){try{return sessionStorage.setItem(h,h),sessionStorage.removeItem(h),!0}catch(a){return!1}},s.webworkers=function(){return!!a.Worker},s.applicationcache=function(){return!!a.applicationCache},s.svg=function(){return!!b.createElementNS&&!!b.createElementNS(r.svg,"svg").createSVGRect},s.inlinesvg=function(){var a=b.createElement("div");return a.innerHTML="<svg/>",(a.firstChild&&a.firstChild.namespaceURI)==r.svg},s.smil=function(){return!!b.createElementNS&&/SVGAnimate/.test(m.call(b.createElementNS(r.svg,"animate")))},s.svgclippaths=function(){return!!b.createElementNS&&/SVGClipPath/.test(m.call(b.createElementNS(r.svg,"clipPath")))};for(var K in s)B(s,K)&&(x=K.toLowerCase(),e[x]=s[K](),v.push((e[x]?"":"no-")+x));return e.input||J(),e.addTest=function(a,b){if(typeof a=="object")for(var d in a)B(a,d)&&e.addTest(d,a[d]);else{a=a.toLowerCase();if(e[a]!==c)return e;b=typeof b=="function"?b():b,typeof f!="undefined"&&f&&(g.className+=" "+(b?"":"no-")+a),e[a]=b}return e},C(""),i=k=null,function(a,b){function k(a,b){var c=a.createElement("p"),d=a.getElementsByTagName("head")[0]||a.documentElement;return c.innerHTML="x<style>"+b+"</style>",d.insertBefore(c.lastChild,d.firstChild)}function l(){var a=r.elements;return typeof a=="string"?a.split(" "):a}function m(a){var b=i[a[g]];return b||(b={},h++,a[g]=h,i[h]=b),b}function n(a,c,f){c||(c=b);if(j)return c.createElement(a);f||(f=m(c));var g;return f.cache[a]?g=f.cache[a].cloneNode():e.test(a)?g=(f.cache[a]=f.createElem(a)).cloneNode():g=f.createElem(a),g.canHaveChildren&&!d.test(a)?f.frag.appendChild(g):g}function o(a,c){a||(a=b);if(j)return a.createDocumentFragment();c=c||m(a);var d=c.frag.cloneNode(),e=0,f=l(),g=f.length;for(;e<g;e++)d.createElement(f[e]);return d}function p(a,b){b.cache||(b.cache={},b.createElem=a.createElement,b.createFrag=a.createDocumentFragment,b.frag=b.createFrag()),a.createElement=function(c){return r.shivMethods?n(c,a,b):b.createElem(c)},a.createDocumentFragment=Function("h,f","return function(){var n=f.cloneNode(),c=n.createElement;h.shivMethods&&("+l().join().replace(/\w+/g,function(a){return b.createElem(a),b.frag.createElement(a),'c("'+a+'")'})+");return n}")(r,b.frag)}function q(a){a||(a=b);var c=m(a);return r.shivCSS&&!f&&!c.hasCSS&&(c.hasCSS=!!k(a,"article,aside,figcaption,figure,footer,header,hgroup,nav,section{display:block}mark{background:#FF0;color:#000}")),j||p(a,c),a}var c=a.html5||{},d=/^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i,e=/^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i,f,g="_html5shiv",h=0,i={},j;(function(){try{var a=b.createElement("a");a.innerHTML="<xyz></xyz>",f="hidden"in a,j=a.childNodes.length==1||function(){b.createElement("a");var a=b.createDocumentFragment();return typeof a.cloneNode=="undefined"||typeof a.createDocumentFragment=="undefined"||typeof a.createElement=="undefined"}()}catch(c){f=!0,j=!0}})();var r={elements:c.elements||"abbr article aside audio bdi canvas data datalist details figcaption figure footer header hgroup mark meter nav output progress section summary time video",shivCSS:c.shivCSS!==!1,supportsUnknownElements:j,shivMethods:c.shivMethods!==!1,type:"default",shivDocument:q,createElement:n,createDocumentFragment:o};a.html5=r,q(b)}(this,b),e._version=d,e._prefixes=n,e._domPrefixes=q,e._cssomPrefixes=p,e.hasEvent=z,e.testProp=function(a){return G([a])},e.testAllProps=I,e.testStyles=y,g.className=g.className.replace(/(^|\s)no-js(\s|$)/,"$1$2")+(f?" js "+v.join(" "):""),e}(this,this.document),function(a,b,c){function d(a){return"[object Function]"==o.call(a)}function e(a){return"string"==typeof a}function f(){}function g(a){return!a||"loaded"==a||"complete"==a||"uninitialized"==a}function h(){var a=p.shift();q=1,a?a.t?m(function(){("c"==a.t?B.injectCss:B.injectJs)(a.s,0,a.a,a.x,a.e,1)},0):(a(),h()):q=0}function i(a,c,d,e,f,i,j){function k(b){if(!o&&g(l.readyState)&&(u.r=o=1,!q&&h(),l.onload=l.onreadystatechange=null,b)){"img"!=a&&m(function(){t.removeChild(l)},50);for(var d in y[c])y[c].hasOwnProperty(d)&&y[c][d].onload()}}var j=j||B.errorTimeout,l=b.createElement(a),o=0,r=0,u={t:d,s:c,e:f,a:i,x:j};1===y[c]&&(r=1,y[c]=[]),"object"==a?l.data=c:(l.src=c,l.type=a),l.width=l.height="0",l.onerror=l.onload=l.onreadystatechange=function(){k.call(this,r)},p.splice(e,0,u),"img"!=a&&(r||2===y[c]?(t.insertBefore(l,s?null:n),m(k,j)):y[c].push(l))}function j(a,b,c,d,f){return q=0,b=b||"j",e(a)?i("c"==b?v:u,a,b,this.i++,c,d,f):(p.splice(this.i++,0,a),1==p.length&&h()),this}function k(){var a=B;return a.loader={load:j,i:0},a}var l=b.documentElement,m=a.setTimeout,n=b.getElementsByTagName("script")[0],o={}.toString,p=[],q=0,r="MozAppearance"in l.style,s=r&&!!b.createRange().compareNode,t=s?l:n.parentNode,l=a.opera&&"[object Opera]"==o.call(a.opera),l=!!b.attachEvent&&!l,u=r?"object":l?"script":"img",v=l?"script":u,w=Array.isArray||function(a){return"[object Array]"==o.call(a)},x=[],y={},z={timeout:function(a,b){return b.length&&(a.timeout=b[0]),a}},A,B;B=function(a){function b(a){var a=a.split("!"),b=x.length,c=a.pop(),d=a.length,c={url:c,origUrl:c,prefixes:a},e,f,g;for(f=0;f<d;f++)g=a[f].split("="),(e=z[g.shift()])&&(c=e(c,g));for(f=0;f<b;f++)c=x[f](c);return c}function g(a,e,f,g,h){var i=b(a),j=i.autoCallback;i.url.split(".").pop().split("?").shift(),i.bypass||(e&&(e=d(e)?e:e[a]||e[g]||e[a.split("/").pop().split("?")[0]]),i.instead?i.instead(a,e,f,g,h):(y[i.url]?i.noexec=!0:y[i.url]=1,f.load(i.url,i.forceCSS||!i.forceJS&&"css"==i.url.split(".").pop().split("?").shift()?"c":c,i.noexec,i.attrs,i.timeout),(d(e)||d(j))&&f.load(function(){k(),e&&e(i.origUrl,h,g),j&&j(i.origUrl,h,g),y[i.url]=2})))}function h(a,b){function c(a,c){if(a){if(e(a))c||(j=function(){var a=[].slice.call(arguments);k.apply(this,a),l()}),g(a,j,b,0,h);else if(Object(a)===a)for(n in m=function(){var b=0,c;for(c in a)a.hasOwnProperty(c)&&b++;return b}(),a)a.hasOwnProperty(n)&&(!c&&!--m&&(d(j)?j=function(){var a=[].slice.call(arguments);k.apply(this,a),l()}:j[n]=function(a){return function(){var b=[].slice.call(arguments);a&&a.apply(this,b),l()}}(k[n])),g(a[n],j,b,n,h))}else!c&&l()}var h=!!a.test,i=a.load||a.both,j=a.callback||f,k=j,l=a.complete||f,m,n;c(h?a.yep:a.nope,!!i),i&&c(i)}var i,j,l=this.yepnope.loader;if(e(a))g(a,0,l,0);else if(w(a))for(i=0;i<a.length;i++)j=a[i],e(j)?g(j,0,l,0):w(j)?B(j):Object(j)===j&&h(j,l);else Object(a)===a&&h(a,l)},B.addPrefix=function(a,b){z[a]=b},B.addFilter=function(a){x.push(a)},B.errorTimeout=1e4,null==b.readyState&&b.addEventListener&&(b.readyState="loading",b.addEventListener("DOMContentLoaded",A=function(){b.removeEventListener("DOMContentLoaded",A,0),b.readyState="complete"},0)),a.yepnope=k(),a.yepnope.executeStack=h,a.yepnope.injectJs=function(a,c,d,e,i,j){var k=b.createElement("script"),l,o,e=e||B.errorTimeout;k.src=a;for(o in d)k.setAttribute(o,d[o]);c=j?h:c||f,k.onreadystatechange=k.onload=function(){!l&&g(k.readyState)&&(l=1,c(),k.onload=k.onreadystatechange=null)},m(function(){l||(l=1,c(1))},e),i?k.onload():n.parentNode.insertBefore(k,n)},a.yepnope.injectCss=function(a,c,d,e,g,i){var e=b.createElement("link"),j,c=i?h:c||f;e.href=a,e.rel="stylesheet",e.type="text/css";for(j in d)e.setAttribute(j,d[j]);g||(n.parentNode.insertBefore(e,n),m(c,0))}}(this,document),Modernizr.load=function(){yepnope.apply(window,[].slice.call(arguments,0))},Modernizr.addTest("csscalc",function(){var a="width:",b="calc(10px);",c=document.createElement("div");return c.style.cssText=a+Modernizr._prefixes.join(b+a),!!c.style.length});

// Places width text in each layout box, has no impact on actual grid
$('.width-unit').each(function(){
    var width = $(this).parent().width();
    $(this).text(width + 'px');
});
// Makes underlay columns 100% height of the content, has no impact on actual grid
$('.underlay [class*="span-"] div').each(function() {
    var height = $(this).parents('.underlay').height();
    $(this).css('height', height);
});

if (!Modernizr.csscalc){
    alert('No Calc')
}
            
          
!
Must be a valid URL.
+ add another resource
via JS Hint
Loading ..................