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HTML

About HTML Preprocessors

HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

Learn more · Versions

CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

Add External Scripts/Pens

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You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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HTML 

              
                <body>
	<div class="notification">
		<p class="notification__floats">Using floats</p>
		<p class="notification__grid">Using CSS Grid</p>
	</div>
	<ul class="grid">
		<li class="card header">
			<h1>Which foods do you like?</h1>
			<p>Tell us what you crave for and we'll get you the tasty bits</p>
		</li>
	
		<li class="card">
			<a href="https://www.freepik.com/free-photo/delicious-salami-pizza_800502.htm">
				<h2>Pizza</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/20130114016-3-cropped.jpg" alt="A salami pizza">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/french-fries_1166511.htm">
				<h2>Fries</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532559/tumblr/1402-cropped.jpg" alt="Some French fries">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/plate-basil-cherry-gourmet-menu_1119851.htm">
				<h2>Pasta</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/1184-cropped.jpg" alt="Spaghetti pomodoro">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/assorted-selection-of-freshly-made-buns_1757786.htm">
				<h2>Bread</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/249541-P3VU6S-681-cropped.jpg" alt="Some bread buns">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/decorative-fast-food-composition_1333702.htm">
				<h2>Junk</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/183551-OWW4VX-649-cropped.jpg" alt="Junk food">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/sandwich-with-chips_2212274.htm">
				<h2>Sandwich</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/156-cropped.jpg" alt="A sandwich">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/slice-of-new-york-cheesecake_1009317.htm">
				<h2>Cheesecake</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/2130-cropped.jpg" alt="Cheesecake">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/portion-beefsteak-dining-meal-barbecued_1047516.htm">
				<h2>Meat</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/322-cropped.jpg" alt="Meat with fries">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/cinnamon-near-spilled-coffee-beans_1815239.htm">
				<h2>Coffee</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/253284-P46VZ2-495-cropped.jpg" alt="Coffee beans scattered on a table">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/chocolate-chunk_964578.htm">
				<h2>Chocolate</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/OFN9XN0-cropped.jpg" alt="Some chocolate">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/ice-cream-background_2333047.htm">
				<h2>Ice cream</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/325412-P9FXDW-955-cropped.jpg" alt="Ice cream">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/cupcakes-with-sprinkles-and-flags_1330134.htm">
				<h2>Cupcakes</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/155547-OUES41-497-cropped.jpg" alt="Colored cupcakes">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/cream-pastry-sweet-white-tasty_1089959.htm">
				<h2>Creamy</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/6033-cropped.jpg" alt="A creamy cake">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/bunch-of-colorful-candies_1369655.htm">
				<h2>Candies</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/173028-OVWF2H-785-cropped.jpg" alt="Lots of candies">
			</a>
		</li>
		
		<li class="card">
			<a href="https://www.freepik.com/free-photo/delicious-salami-pizza_800502.htm">
				<h2>Pizza</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/20130114016-3-cropped.jpg" alt="A salami pizza">
			</a>
		</li>
		
		<li class="card">
			<a href="https://www.freepik.com/free-photo/french-fries_1166511.htm">
				<h2>Fries</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532559/tumblr/1402-cropped.jpg" alt="Some French fries">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/plate-basil-cherry-gourmet-menu_1119851.htm">
				<h2>Pasta</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/1184-cropped.jpg" alt="Spaghetti pomodoro">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/assorted-selection-of-freshly-made-buns_1757786.htm">
				<h2>Bread</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/249541-P3VU6S-681-cropped.jpg" alt="Some bread buns">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/decorative-fast-food-composition_1333702.htm">
				<h2>Junk</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/183551-OWW4VX-649-cropped.jpg" alt="Junk food">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/sandwich-with-chips_2212274.htm">
				<h2>Sandwich</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/156-cropped.jpg" alt="A sandwich">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/slice-of-new-york-cheesecake_1009317.htm">
				<h2>Cheesecake</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/2130-cropped.jpg" alt="Cheesecake">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/portion-beefsteak-dining-meal-barbecued_1047516.htm">
				<h2>Meat</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/322-cropped.jpg" alt="Meat with fries">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/cinnamon-near-spilled-coffee-beans_1815239.htm">
				<h2>Coffee</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/253284-P46VZ2-495-cropped.jpg" alt="Coffee beans scattered on a table">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/chocolate-chunk_964578.htm">
				<h2>Chocolate</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/OFN9XN0-cropped.jpg" alt="Some chocolate">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/ice-cream-background_2333047.htm">
				<h2>Ice cream</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532558/tumblr/325412-P9FXDW-955-cropped.jpg" alt="Ice cream">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/cupcakes-with-sprinkles-and-flags_1330134.htm">
				<h2>Cupcakes</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/155547-OUES41-497-cropped.jpg" alt="Colored cupcakes">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/cream-pastry-sweet-white-tasty_1089959.htm">
				<h2>Creamy</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/6033-cropped.jpg" alt="A creamy cake">
			</a>
		</li>
		<li class="card">
			<a href="https://www.freepik.com/free-photo/bunch-of-colorful-candies_1369655.htm">
				<h2>Candies</h2>
				<img src="https://res.cloudinary.com/mgiulio/image/upload/v1530532557/tumblr/173028-OVWF2H-785-cropped.jpg" alt="Lots of candies">
			</a>
		</li>
	</ul>
</body>
!

CSS 

              
                /*
 * Sass stuff
 */
 
$item-size: 210px;
$col-gutter: 10px;
$vp-gutter: $col-gutter;
$max-cols: 5;
$scrollbar-size: 20px;

@function grid-width($num-cols) {
	@return $num-cols * $item-size + ($num-cols - 1) * $col-gutter;
}

@mixin when-n-cols($n) {
	@media screen and (min-width: #{grid-width($n) + 2 * $vp-gutter + $scrollbar-size}) {
		@content;
	}
}

/*
 * Basics
 */

body {
	margin: 0;
	font-size: 16px;
	background-color: #222;
	color: #fff;
}

img {
	border: none;
}

/*
 * Common layout code
 */
 
.grid {
	margin: 0;
	padding: 0;
	list-style: none;
	
	margin: 40px auto;
	padding-left: $vp-gutter;
	padding-right: $vp-gutter;
}

/*
 * Float layout
 */

.grid {
	width: grid-width(1);
	
	.card {
		float: left;
		width: $item-size;
		height: $item-size;
		margin: 0;
		margin-bottom: $col-gutter;
	}
	
	&::after {
		content: '';
		display: table;
		clear: both;
	}
	
	@include when-n-cols(2) {
		width: grid-width(2);
		.card:nth-child(2n) {
			margin-right: $col-gutter;
		}
		.header {
			$header-size: grid-width(2);
			width: $header-size;
			height: $header-size;
		}
	}
	
	@include when-n-cols(3) {
		width: grid-width(3);
		.card {
			margin-right: $col-gutter;
		}
		.card:nth-child(2),
		.card:nth-child(3),
		.card:nth-child(3n + 6)
		{
			margin-right: 0;
		}
	}
	
	@include when-n-cols(4) {
		width: grid-width(4);
		.card,
		.card:nth-child(2),
		.card:nth-child(3),
		.card:nth-child(3n + 6)
		{
			margin-right: $col-gutter;
		}
		.card:nth-child(3),
		.card:nth-child(5),
		.card:nth-child(4n + 9)
		{
			margin-right: 0;
		}
	}
	
	@include when-n-cols(5) {
		width: grid-width(5);
		.card:nth-child(3),
		.card:nth-child(5),
		.card:nth-child(4n + 9)
		{
			margin-right: $col-gutter;
		}
		.card:nth-child(4),
		.card:nth-child(7),
		.card:nth-child(5n + 12)
		{
			margin-right: 0;
		}
	}
	
}

/*
 * CSS Grid Layout overrides the previous float layout on supporting browsers
 */
 
.grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, $item-size);
	grid-auto-rows: $item-size;
	grid-gap: $col-gutter;
	
	justify-content: center;
}

@supports (display: grid) {
	.grid {
		width: auto;
		max-width: grid-width($max-cols);
		.card {
			margin: 0 !important;
		}
	}
}

@include when-n-cols(2) {
	.grid .header {
		grid-row: span 2;
		grid-column: span 2;
	}
}

/*
 * Cards
 */
 
.grid .card {
	transition-property: transform;
	transition-duration: 0.3s;
	
	transition-property: -webkit-transform;
  transition-property: transform;
  transition-property: transform, -webkit-transform;
	
	background-color: #333;
}
 
.grid .card a {
	display: block;
	width: 100%;
	height: 100%;
	
	position: relative;
}

.grid .card img {
	display: block;
	width: 100%;
	height: 100%;
	-o-object-fit: cover;
	object-fit: cover;
}

.grid .card h2 {
	margin: 0;
	
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	
	padding: 10px;
	
	text-decoration: none;
	font-family: Raleway, sans-serif;
	font-weight: normal;
	font-size: 1em;
	letter-spacing: 1px;
	
	color: #fff;
	
	background: rgba(0,0,0, 0.2);
	background: radial-gradient(ellipse at center, transparent 0, rgba(0,0,0, .36) 100%);
}

.grid .card:hover {
	-webkit-transform: scale(0.95);
	-ms-transform: scale(0.95);
	transform: scale(0.95);
}

.grid .header:hover {
	-webkit-transform: none;
	-ms-transform: none;
	transform: none;
}

/* Focus style as hovering, if possible */
.grid .card a:focus {
	outline: 2px solid #d11ee9;
}
.grid .card:focus-within {
	-webkit-transform: scale(0.95);
	-ms-transform: scale(0.95);
    transform: scale(0.95);
}
.grid .card:focus-within a:focus {
	outline: none;
}

.grid .header {
	box-sizing: border-box;

	text-align: center;
	padding-top: 23px;
	
	font-size: 1.6875em;
	line-height: 1.3;
	
	background: radial-gradient(ellipse at center, transparent 0, rgba(0,0,0, 0.48) 100%) hsla(0, 0%, 27%, 1);
}

.grid .header h1 {
	margin-top: 0;
	margin-bottom: 0.67em;
	
	font-family: 'Cherry Swash', cursive;
	text-transform: capitalize;
	font-size: 1em;
	font-weight: normal;
	
	padding-left: 28px;
	padding-right: 28px;
}

.grid .header p {
	margin: 0;
	
	font-family: 'Raleway', sans-serif;
	font-size: 0.52em;
	
	padding-left: 34px;
	padding-right: 34px;
	
	color: #c7c7c7;
}

@include when-n-cols(2) {
	.grid .header {
		font-size: 2.5em;
		
		padding-top: 100px;
	}
	
	.grid .header h1 {
		padding-left: 80px;
		padding-right: 80px;
	}

	.grid .header p {
		padding-left: 120px;
		padding-right: 120px;
	}
}

/*
 * Show the used layout method
 */

.notification {
	position: fixed;
	top: 0;
	left: 0;
	
	font-family: 'Raleway', sans-serif;
	font-size: 20px;
	line-height: 30px;
	padding: 0 20px;
	
	background-color: red;
	color: white;
	
	-webkit-animation-name: hide;
    animation-name: hide;
	-webkit-animation-duration: 1s;
	animation-duration: 1s;
	-webkit-animation-delay: 2s;
	animation-delay: 2s;
	-webkit-animation-iteration-count: 1;
	animation-iteration-count: 1;
	-webkit-animation-fill-mode: forwards;
	animation-fill-mode: forwards;
}

.notification__grid {
	display: none;
}

@supports (display: grid) {
	.notification__floats {
		display: none;
	}
	.notification__grid {
		display: block;
	}
}

@-webkit-keyframes hide {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}
@keyframes hide {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}
!

JS
!
999px

Console