- var data = [
- 	{
- 		slist: ['329, 100%, 70%', '337, 99%, 58%'], 
- 		icon: '🍓', 
- 		title: 'gingerbread', 
- 		ptext: 'Cake muffin donut chocolate cake jelly sesame wafer tart pie muffin.'
- 	}, 
- 	{
- 		slist: ['48, 99%, 58%', '33, 94%, 55%'], 
- 		icon: '🍋', 
- 		title: 'brownie', 
- 		ptext: 'Cake cookie lemon muffin plum. Orange topping macaroon chocolate.'
- 	}, 
- 	{
- 		slist: ['272, 46%, 54%', '273, 78%, 48%'], 
- 		icon: '🍇', 
- 		title: 'ice cream', 
- 		ptext: 'Cake muffin donut chocolate cake jelly sesame wafer tart pie muffin.'
- 	}, 
- 	{
- 		slist: ['174, 84%, 34%', '193, 99%, 27%'], 
- 		icon: '🍐', 
- 		title: 'lava cake', 
- 		ptext: 'Cake cookie lemon muffin plum. Orange topping macaroon chocolate.'
- 	}
- ];
- var n = data.length;
- var comp = ['hue', 'sat', 'lum'];

- for(var i = 0; i < n; i++)
	- let m = data[i].slist.length;
	- let s = [];
	- for(var j = 0; j < m; j++)
		- var c = data[i].slist[j].split(', ');
		- for(var k = 0; k < 3; k++)
			- s.push(`--${comp[k]}${j}: ${c[k]}`)
	article(data-icon=`${data[i].icon}` style=`${s.join('; ')}; --idx: ${i}`)
		h3 option
		h4 #{data[i].title}
		p #{data[i].ptext}

@import 'compass/css3';

$lum0: 98%;
$lum1: 83%;
$sat: 9%;
$lin-h: 1.25;
$hd4-fs: 2.25rem;

// WIDE CASE
// rows
$row-1-wide: $hd4-fs*$lin-h;
$row-2-wide: 3.75rem;
$row-3-wide: 0;
// columns
$col-a-wide: 11.5rem; // option numbering
$col-b-wide: 14rem; // heading & text
$col-c-wide: 5rem; // icon
$col-d-wide: .375rem; // separator
$col-1-wide: calc(var(--q)*#{$col-a-wide} + var(--p)*#{$col-b-wide});
$col-2-wide: calc(var(--q)*#{$col-c-wide} + var(--p)*#{$col-d-wide});
$col-3-wide: calc(var(--q)*#{$col-d-wide} + var(--p)*#{$col-c-wide});
$col-4-wide: calc(var(--q)*#{$col-b-wide} + var(--p)*#{$col-a-wide});

$art-g-wide: 1.5rem;
$art-b-wide: .1875rem;
$art-p-wide: 2.25rem;
$art-w-wide: $col-a-wide + $col-b-wide + $col-c-wide + $col-d-wide + 
						 4*$art-g-wide + 2*$art-b-wide;
$art-h-wide: $row-1-wide + 3*$lin-h*1rem + 
						 2*$art-p-wide + 2*$art-b-wide;
$art-r-wide: 9px;
$art-gb-wide: 1rem;
$art-gr-wide: (pow(.5*$art-h-wide, 2) + pow($art-gb-wide, 2))/$art-gb-wide*1rem;
$art-gd-wide: $art-gr-wide - $col-a-wide - $art-b-wide;
$art-gx-wide: calc(var(--p)*100% - var(--s)*#{$art-gd-wide});

$hd3-mv-wide: -($art-p-wide + $art-b-wide);
$hd3-mr-wide: calc(var(--p)*#{-$art-b-wide});
$hd3-ml-wide: calc(var(--q)*#{-$art-b-wide});
$hd3-pv-wide: $art-p-wide + $art-b-wide;
$hd3-fs-wide: .25*($row-1-wide + 3*$lin-h*1rem);
$hd3-lh-wide: 1;
$num-fs-wide: 3em;

$ico-fs-wide: $col-c-wide/$lin-h;

$art-gf: $art-gb-wide/$art-h-wide;

// NORM CASE
$row-1-norm: 15vw;
$row-2-norm: $hd4-fs*$lin-h;
$col-2-norm: $row-2-norm;
$col-1-norm: calc(100% - #{$col-2-norm});

$art-p-norm: 2vw;
$art-gb-norm: $art-gf*100vw;
$art-gr-norm: (pow(.5*100vw, 2) + pow($art-gb-norm, 2))/$art-gb-norm*1vw;
$art-gd-norm: $art-gr-norm - $row-1-norm - $art-p-norm;
$art-gy-norm: -$art-gd-norm;

$hd3-m-norm: -$art-p-norm;
$hd3-lh-norm: 1.75;
$hd3-fs-norm: ($row-1-norm - .375*$art-gb-norm)/$hd3-lh-norm;
$num-fs-norm: 1em;

$ico-fs-norm: $row-2-norm/$lin-h;

// UNIF CASE
$row-1: calc(var(--i)*#{$row-1-wide} + var(--j)*#{$row-1-norm});
$row-2: calc(var(--i)*#{$row-2-wide} + var(--j)*#{$row-2-norm});
$row-3: calc(var(--j)*3.75rem);
$col-1: calc(var(--i)*#{$col-1-wide} + var(--j)*#{$col-1-norm});
$col-2: calc(var(--i)*#{$col-2-wide} + var(--j)*#{$col-2-norm});
$col-3: calc(var(--i)*#{$col-3-wide});
$col-4: calc(var(--i)*#{$col-4-wide});

$art-g: calc(var(--i)*#{$art-g-wide});
$art-b: calc(var(--i)*#{$art-b-wide});
$art-pv: calc(var(--i)*#{$art-p-wide} + var(--j)*#{$art-p-norm});
$art-pr: calc(var(--i)*var(--q)*#{$art-g-wide} + var(--j)*#{$art-p-norm});
$art-pl: calc(var(--i)*var(--p)*#{$art-g-wide} + var(--j)*#{$art-p-norm});
$art-r: calc(var(--i)*#{$art-r-wide});
$art-gr: calc(var(--i)*#{$art-gr-wide} + var(--j)*#{$art-gr-norm});
$art-gd: calc(var(--i)*#{$art-gd-wide} + var(--j)*#{$art-gd-norm});
$art-gx: calc(var(--i)*#{$art-gx-wide} + var(--j)*50%);
$art-gy: calc(var(--i)*50% + var(--j)*#{$art-gy-norm});

$hd3-mt: calc(var(--i)*#{$hd3-mv-wide} + var(--j)*#{$hd3-m-norm});
$hd3-mr: calc(var(--i)*#{$hd3-mr-wide} + var(--j)*#{$hd3-m-norm});
$hd3-mb: calc(var(--i)*#{$hd3-mv-wide});
$hd3-ml: calc(var(--i)*#{$hd3-ml-wide} + var(--j)*#{$hd3-m-norm});
$hd3-pv: calc(var(--i)*#{$hd3-pv-wide});
$hd3-fs: calc(var(--i)*#{$hd3-fs-wide} + var(--j)*#{$hd3-fs-norm});
$hd3-lh: calc(var(--i)*#{$hd3-lh-wide} + var(--j)*#{$hd3-lh-norm});
$num-fs: calc(var(--i)*#{$num-fs-wide} + var(--j)*#{$num-fs-norm});
$ico-fs: calc(var(--i)*#{$ico-fs-wide} + var(--j)*#{$ico-fs-norm});

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	--i: var(--wide, 1);
	--j: calc(1 - var(--i));
	background: #818286;
	$c: rgba(#fff, .8);
	background: 
		linear-gradient($c, $c), 
		url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/2017/kreator_rockharz_july_2018.jpg) 
			50%/ cover;
	font: 400 1em/ #{$lin-h} 
		koho, trebuchet ms, verdana, century gothic, arial, sans-serif;
	
	@media (max-width: $art-w-wide) { --wide: 0 }
	
	@media (max-width: 250px) { font-size: .75em }
}

article {
	--p: var(--parity, 0);
	--q: calc(1 - var(--p));
	--s: calc(1 - 2*var(--p));
	display: grid;
	grid-template: 
		#{$row-1} #{$row-2} #{$row-3}/ 
		#{$col-1} #{$col-2} #{$col-3} #{$col-4};
	grid-gap: 0 $art-g;
	margin: .5em auto;
	border: solid $art-b transparent;
	padding: $art-pv $art-pr $art-pv $art-pl;
	max-width: $art-w-wide;
	border-radius: $art-r;
	background: 
		Linear-gradient(calc(var(--s)*90deg), 
				HSL(var(--hue0), 
					calc(var(--p)*var(--sat0) + var(--q)*#{$sat}), 
						calc(var(--p)*var(--lum0) + var(--q)*#{$lum0})) calc(var(--i)*#{$col-a-wide}), 
				HSL(var(--hue1), 
						calc(var(--p)*var(--sat1) + var(--q)*#{$sat}), 
						calc(var(--p)*var(--lum1) + var(--q)*#{$lum1}))) padding-box, 
		Linear-gradient(calc(var(--s)*90deg), 
				HSL(var(--hue1), 
						calc(var(--p)*var(--sat1) + var(--q)*#{$sat}), 
						calc(var(--p)*var(--lum1) + var(--q)*#{$lum1})) $col-a-wide + $art-b-wide, 
				HSL(var(--hue0), 
						calc(var(--p)*var(--sat0) + var(--q)*#{$sat}), 
						calc(var(--p)*var(--lum0) + var(--q)*#{$lum0}))) border-box;
	color: HSL(var(--hue1), 
		calc(var(--q)*var(--sat1) + var(--p)*#{$sat}), 
						 calc(var(--q)*var(--lum1) + var(--p)*#{$lum0}));
	counter-increment: idx;
	
	&:before {
		grid-column: 
			/* starts on 3rd col for odd items, 2nd for even in wide case  */
			calc((3*var(--q) + 2*var(--p)))/ 
			/* always spans just 1 col */
			span 1;
		grid-row: 
			/* starts on 1st row in wide case */
			1/ 
			/* spans all 3 rows in wide case */
			span 3;
		width: calc(var(--i)*#{$col-d-wide});
		border-radius: $col-d-wide;
		box-shadow: inset 2px 0 5px rgba(#000, .35), 
			inset -1px 0 3px rgba(#fff, .25), 
			1px 0 1px rgba(#fff, .5);
		background: HSL(var(--hue1), var(--sat1), var(--lum1));
		content: ''
	}
	
	&:after {
		grid-column: 
			/* starts on 2nd col for odd items, 3rd for even in wide case  */
			calc(var(--i)*(2*var(--q) + 3*var(--p)) + 2*var(--j))/ 
			/* always spans just 1 col */
			span 1;
		grid-row: 
			/* starts on 1st row in wide case, 2nd for norm */
			calc(var(--i) + 2*var(--j))/ 
			/* spans all 3 rows in wide case, just 1 in narrow case */
			span calc(3*var(--i) + var(--j));
		place-self: center;
		font-size: $ico-fs;
		filter: Grayscale(var(--p)) 
						Brightness(calc(var(--q) + 1.25*var(--p)));
		content: attr(data-icon)
	}
	
	&:nth-child(2n) { --parity: 1 }
}

h3 {
	display: grid;
	grid-template: 
		repeat(calc(1 + 3*var(--i)), 1fr)/ 
		repeat(calc(1 + 2*var(--j)), 1fr);
	place-items: center;
	grid-column: 
		/* starts on 1st col for odd items, 4th for even in wide case  */
		calc(var(--i)*(var(--q) + 4*var(--p)) + var(--j))/ 
		/* spans just 1 col in wide case, all non-zero ones in normal */
		span calc(var(--i) + 2*var(--j));
	grid-row: 
		/* always starts on 1st row */
		1/ 
		/* spans all 3 rows in wide case, just 1 in narrow case */
		span calc(3*var(--i) + var(--j));
	margin: $hd3-mt $hd3-mr $hd3-mb $hd3-ml;
	padding: $hd3-pv 0;
	border-radius: inherit;
	background: 
		//linear-gradient(pink, pink) content-box, 
		Radial-gradient(circle at $art-gx $art-gy, 
				HSL(var(--hue0), 
					calc(var(--q)*var(--sat0) + var(--p)*#{$sat}), 
					calc(var(--q)*var(--lum1) + var(--p)*#{$lum0})) $art-gd, 
				HSL(var(--hue1), 
					calc(var(--q)*var(--sat1) + var(--p)*#{$sat}), 
					calc(var(--q)*var(--lum1) + var(--p)*#{$lum1})) $art-gr);
	color: HSL(var(--hue1), var(--sat1), calc(var(--p)*var(--lum1) + var(--q)*#{$lum0}));
	font-size: $hd3-fs;
	font-weight: 600;
	line-height: $hd3-lh;
	text-align: center;
	text-transform: uppercase;
	clip-path: circle($art-gr at $art-gx $art-gy);
	
	&:before {
		grid-row: 1/ span calc(1 + var(--j));
		font-size: $num-fs;
		content: counter(idx, decimal-leading-zero)
	}
}

h4 {
	grid-column: 
		/* starts on 4th col for odd items, 1st for even in wide case  */
		calc(var(--i)*(4*var(--q) + var(--p)) + var(--j))/ 
		/* always spans 1 col */
		span 1;
	grid-row: 
		calc(var(--i) + 2*var(--j))/ 
		/* always spans 1 row */
		span 1;
	//background: rgba(red, .2);
	font-size: $hd4-fs;
	font-weight: 500;
	text-transform: capitalize;
}

p {
	grid-column: 
		/* starts on 4th col for odd items, 1st for even in wide case  */
		calc(var(--i)*(4*var(--q) + var(--p)) + var(--j))/ 
		/* spans 1 col in the wide case and 2 in the norm case */
		span calc(var(--i) + 2*var(--j));
	grid-row: 
		calc(2*var(--i) + 3*var(--j))/ 
		/* always spans 1 row */
		span 1;
	//background: rgba(purple, .2);
}