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HTML

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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

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CSS

About CSS Preprocessors

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

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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-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <header class="header">
	<h1 class="header-title masthead">Equestrian</h1>
</header>
<main class="main">
	<article class="entry entry-lede">
		<img class="entry-img" src="https://assets.codepen.io/467/horse02.jpg" alt="A handsome young horse in front of an expansive sky" />
		<div class="entry-content">
			<h1 class="entry-headline primary-headline">This horse sure knows how to code</h1>
			<time class="entry-date meta">January 24, 2021</time>
			<span class="entry-byline meta">by Alex Trost</span>
			<p class="entry-summary">Aliquam justo enim, mollis a justo et, sagittis vulputate turpis. Nulla facilisi. Proin quis mattis ipsum, eu eleifend dolor. Nulla auctor ex vel ipsum varius viverra. Vestibulum convallis elit nec quam bibendum varius. Morbi ut mattis dui. Aenean a massa vitae magna commodo consequat. Duis ac lacus.</p>
		</div>
	</article>
	<article class="entry">
		<img class="entry-img" src="https://assets.codepen.io/467/horse03.jpg" alt="The profile view of three majestic brown horses" />
		<h1 class="entry-headline primary-headline">Trost’s tolt trots to TypeScript</h1>
		<time class="entry-date meta">January 24, 2021</time>
		<span class="entry-byline meta">by Alex Trost</span>
		<p class="entry-summary">Cras mollis dolor vitae tellus sollicitudin, quis sagittis mauris dictum. Donec aliquet ipsum et ex pulvinar, id vestibulum lectus egestas. Vestibulum non ultrices mauris, nec elementum mauris. Donec aliquet ipsum at risus vulputate viverra.</p>
	</article>
	<article class="entry">
		<img class="entry-img" src="https://assets.codepen.io/467/horse01.jpg" alt="The profile view of three majestic brown horses" />
		<h1 class="entry-headline primary-headline">This team of three does front end magic</h1>
		<time class="entry-date meta">January 24, 2021</time>
		<span class="entry-byline meta">by Alex Trost</span>
		<p class="entry-summary">Mauris ut volutpat quam. Duis vitae turpis volutpat dolor efficitur rhoncus. Aenean lacinia est non porta dictum. Curabitur cursus mauris est, nec pharetra nisi imperdiet eget. Suspendisse non ultricies ligula.</p>
	</article>
	<section class="trending">
		<article class="trending-entry">
			<time class="trending-entry-date meta">January 24, 2021</time>
			<h1 class="trending-entry-headline primary-headline">Gallop into the amazing new world of CSS</h1>
		</article>
		<article class="trending-entry">
			<time class="trending-entry-date meta">January 24, 2021</time>
			<h1 class="trending-entry-headline primary-headline">Horse around with new HTML5 tags</h1>
		</article>
		<article class="trending-entry">
			<time class="trending-entry-date meta">January 24, 2021</time>
			<h1 class="trending-entry-headline primary-headline">Five featured fonts of front end horse</h1>
		</article>
		<article class="trending-entry">
			<time class="trending-entry-date meta">January 24, 2021</time>
			<h1 class="trending-entry-headline primary-headline">Saddle up with Rust</h1>
		</article>
	</section>
</main>
!

CSS 

              
                /*
LINKS:
Typetura docs: https://docs.typetura.com/creating-with-typetura/creating-your-own-typographic-system
Cubic Bezier: https://cubic-bezier.com/
Fraunces: https://fraunces.undercase.xyz/
Google variable fonts: https://css-tricks.com/getting-the-most-out-of-variable-fonts-on-google-fonts/
Grid system: https://gist.github.com/scottkellum/bb46ea68c23e630842ee80c37513a3e6
*/

/* Import our variable font Fraunces */
@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght,SOFT,WONK@9..144,100..900,0..100,0..1&family=Fraunces:ital,opsz,wght,SOFT,WONK@1,9..144,100..900,0..100,0..1&display=swap");

/* Variables and page setup */

html {
	font-family: Fraunces, serif;
	font-size: 115%;
	line-height: 1.35;
	font-weight: 340;
	color: var(--text);
	background: var(--background);
	padding-bottom: 20vh;

	/* Typetura */
	--tt-key: html;
	--tt-max: 900;
	--tt-ease: cubic-bezier(0, 0.78, 0.53, 1);

	/* Grid */
	--max-width: 1200px;
	--columns: 6;
	--gutter: 1.5rem;

	/* Color */
	--primary: #f4663a;
	--background: #efeded;
	--background-alt: #ffffff;
	--text: #31355b;
}
@keyframes html {
	0% {
		font-size: 0%;
	}

	100% {
		font-size: 125%;
	}
}
* {
	--grid: minmax(var(--gutter), 1fr)
		repeat(
			var(--columns),
			minmax(
				0,
				calc(
					(var(--max-width) - (var(--gutter) * (var(--columns) - 1))) /
						var(--columns)
				)
			)
		)
		minmax(var(--gutter), 1fr);
}

/* Element styles */

body {
	margin: 0;
}

img {
	width: 100%;
}

/* Typography */

.masthead {
	color: var(--primary);
	mix-blend-mode: multiply;
	text-align: center;
	font-variation-settings: "WONK" 1, "SOFT" 30;
	--tt-key: masthead;
	--tt-max: 1200;
	--tt-ease: ease-in-out;
	margin: 0.5em 0 -0.5em;
}
@keyframes masthead {
	0% {
		font-size: 1rem;
		margin-bottom: -0.45em;
		font-weight: 600;
	}
	100% {
		font-size: 6.5rem;
		margin-bottom: -0.375em;
		font-weight: 500;
	}
}

.primary-headline {
	--tt-key: primary-headline;
	--tt-ease: cubic-bezier(1, 0, 1, 1);
	--tt-max: 585;
	line-height: 1;
	font-variation-settings: "SOFT" 0, "WONK" 1;
	margin: 0.5rem 0;
}
@keyframes primary-headline {
	0% {
		font-size: 1rem;
		font-weight: 500;
	}
	100% {
		font-size: 4rem;
		font-weight: 300;
	}
}

.meta {
	font-style: italic;
	margin: 0.25rem 0;
	font-size: 0.75rem;
}

.entry-summary {
	margin: 0.25rem 0;
}

/* Layout */

.main {
	column-gap: var(--gutter);
	grid-template-columns: var(--grid);
	padding: var(--gutter);
}

.entry {
	margin-bottom: var(--gutter);
}

.entry,
.entry-content {
	display: flex;
	flex-direction: column;
}

.entry-img {
	aspect-ratio: 5 / 3;
	object-fit: cover;
}

.entry-date {
	order: -1;
}

/* Module overrides */

.entry-lede time {
	margin-bottom: 1rem;
}

.entry-lede time::after {
	content: "";
	display: block;
	width: calc(100% + (var(--gutter) * 2));
	height: 1px;
	margin-left: calc(var(--gutter) * -2);
	background: var(--primary);
	mix-blend-mode: multiply;
	margin-top: 0.67rem;
}

/* Breakpoints */

@media (min-width: 30em) {
	html {
		--columns: 12;
	}
	.main,
	.entry-lede {
		padding: 0;
		display: grid;
	}

	.entry,
	.trending {
		grid-column-start: 3;
		grid-column-end: span 10;
	}

	.entry-lede {
		column-gap: var(--gutter);
		grid-template-columns: var(--grid);
		grid-column-start: 1;
		grid-column-end: span 14;
		margin-bottom: 4rem;
	}

	.entry-lede > .entry-img {
		aspect-ratio: auto;
		grid-column-start: 1;
		grid-column-end: span 10;
	}

	.entry-lede .entry-content {
		grid-column-start: 3;
		grid-column-end: span 11;
		margin: -2.5rem calc(var(--gutter) * -1) 0;
		background: var(--background-alt);
		padding: 0.5rem var(--gutter) 1rem;
	}
}
@media (min-width: 50em) {
	html {
		--columns: 24;
	}

	.main::before,
	.main::after {
		content: "";
		display: block;
		grid-column-start: 8;
		grid-column-end: 26;
		grid-row-start: 2;
		grid-row-end: 3;
		background: var(--background-alt);
		margin: 0 calc(var(--gutter) * -1);
		z-index: -1;
	}
	.main::after {
		grid-column-start: 2;
		background-color: var(--primary);
		height: 1px;
		mix-blend-mode: multiply;
	}

	.entry {
		grid-column-end: span 9;
		margin-bottom: var(--gutter);
	}
	.entry:nth-child(n + 2) {
		margin-top: -2rem;
		grid-row-start: 2;
	}
	.entry:nth-child(2) {
		grid-column-start: 8;
	}
	.entry:nth-child(3) {
		grid-column-start: 17;
	}

	.entry-lede {
		column-gap: var(--gutter);
		grid-template-columns: var(--grid);
		grid-column-start: 1;
		grid-column-end: span 26;
		margin-bottom: 4rem;
	}

	.entry-lede > .entry-img {
		aspect-ratio: auto;
		grid-column-start: 1;
		grid-column-end: span 13;
	}

	.entry-lede .entry-content {
		grid-column-start: 14;
		grid-column-end: span 12;
		margin: 0.5rem 0;
		padding: 4rem 0 0;
		background: none;
	}

	.trending {
		grid-row-start: 2;
		grid-column-start: 2;
		grid-column-end: span 6;
		margin-top: var(--gutter);
		transform: translatex(calc(var(--gutter) * -1));
	}
}
!

JS
!
999px

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