Layout · Complete runnable example
Cards that find their own column count, with useful minimum widths and no layout script.
This preview runs in an isolated document. Clipboard writes and saved preferences may be blocked, and printing requires the standalone file. A dialog affects only the example. Reset reloads the original example state.
Use this grid for a collection of projects, resources, or articles whose count can change. The layout works with the cards in the document and lets their order remain the same for reading and keyboard navigation.
The preview, copied text, and downloaded file use this same document.
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<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta
http-equiv="Content-Security-Policy"
content="default-src 'none'; style-src 'unsafe-inline'; script-src 'unsafe-inline'; img-src data:; connect-src 'none'; form-action 'none'; object-src 'none'; base-uri 'none'"
/>
<title>MRHTML | A responsive card grid</title>
<style>
:root {
color-scheme: light;
--paper: #f6f5f0;
--white: #fff;
--ink: #172437;
--muted: #546171;
--line: #c9ced4;
--blue: #204cbb;
--soft: #e9eefb;
font-family: Arial, Helvetica, sans-serif;
}
* {
box-sizing: border-box;
}
body {
margin: 0;
background: var(--paper);
color: var(--ink);
line-height: 1.65;
}
main {
width: min(72rem, calc(100% - 3rem));
margin: 0 auto;
padding: clamp(2rem, 6vw, 4.5rem) 0;
}
h1,
h2,
h3,
p {
margin: 0;
}
a {
color: var(--blue);
text-underline-offset: 0.25em;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible {
outline: 3px solid var(--blue);
outline-offset: 4px;
}
.eyebrow {
color: var(--blue);
font-size: 0.72rem;
font-weight: 700;
letter-spacing: 0.15em;
text-transform: uppercase;
}
h1 {
font-size: clamp(2.3rem, 6vw, 4.2rem);
letter-spacing: -0.055em;
line-height: 1.08;
max-width: 15ch;
overflow-wrap: anywhere;
}
.intro {
color: var(--muted);
font-size: 1rem;
max-width: 40rem;
margin-top: 1.3rem;
}
.footer-note {
margin-top: 2.5rem;
border-top: 1px solid var(--line);
padding-top: 1.25rem;
color: var(--muted);
font-size: 0.8rem;
}
[hidden] {
display: none !important;
}
@media (max-width: 420px) {
main {
width: calc(100% - 2rem);
}
}
@media (prefers-reduced-motion: reduce) {
*,
*::before,
*::after {
scroll-behavior: auto !important;
animation: none !important;
transition: none !important;
}
}
.masthead {
flex-wrap: wrap;
display: flex;
justify-content: space-between;
align-items: center;
gap: 1rem;
border-bottom: 1px solid var(--line);
padding-bottom: 1rem;
margin-bottom: 2.75rem;
}
.edition {
font-size: 0.72rem;
color: var(--muted);
text-align: right;
}
.intro-heading {
display: grid;
grid-template-columns: 1.2fr 1fr;
gap: 2rem;
align-items: end;
margin-bottom: 2.5rem;
}
.intro-heading .intro {
margin: 0;
}
.card-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
gap: 1.2rem;
}
.card {
min-width: 0;
background: var(--white);
border: 1px solid var(--line);
border-radius: 0.9rem;
overflow: hidden;
display: flex;
flex-direction: column;
}
.card-art {
height: 8rem;
background: var(--soft);
padding: 1.3rem;
position: relative;
overflow: hidden;
}
.art-label {
position: relative;
z-index: 1;
font-size: 0.68rem;
text-transform: uppercase;
letter-spacing: 0.11em;
color: #344d77;
}
.card-art::before,
.card-art::after {
content: none;
position: absolute;
border: 1px solid #627ba9;
}
.art-grid::before {
width: 6rem;
height: 6rem;
right: 2rem;
top: 2rem;
border-radius: 0.5rem;
background:
repeating-linear-gradient(
90deg,
transparent 0 1.8rem,
#627ba9 1.8rem 1.85rem
),
repeating-linear-gradient(
0deg,
transparent 0 1.8rem,
#627ba9 1.8rem 1.85rem
);
transform: rotate(-10deg);
}
.art-type {
background: #f0ead9;
}
.art-type::before {
width: 8rem;
height: 1rem;
right: 1.3rem;
bottom: 3rem;
background: #bcb099;
border: 0;
transform: rotate(-8deg);
box-shadow: 0 1.5rem 0 -0.25rem #7c765f;
}
.art-focus {
background: #e7efe6;
}
.art-focus::before {
width: 7rem;
height: 3rem;
right: 2rem;
bottom: 1.1rem;
border: 2px solid #477151;
outline: 1px dashed #477151;
outline-offset: 6px;
border-radius: 1rem;
transform: rotate(-8deg);
}
.art-space {
background: #f1e8e3;
}
.art-space::before {
width: 3.5rem;
height: 3.5rem;
border-radius: 50%;
background: #a8735e;
border: 0;
right: 2rem;
bottom: 0.8rem;
}
.art-space::after {
width: 5rem;
height: 5rem;
border-radius: 50%;
right: 4.5rem;
top: 2rem;
border-color: #a8735e;
}
.art-motion {
background: #ede8f5;
}
.art-motion::before {
width: 4rem;
height: 4rem;
border-radius: 50%;
right: 2rem;
top: 3rem;
background: #9884b8;
border: 0;
box-shadow:
-1.5rem 0 0 #c3b7d5,
-3rem 0 0 #d6cfe2;
}
.art-reading {
background: #e2eeef;
}
.art-reading::before {
width: 6rem;
height: 6rem;
background: #fbfcf9;
right: 2rem;
top: 2rem;
transform: rotate(10deg);
border-color: #698788;
}
.art-reading::after {
width: 4rem;
height: 3rem;
border: 0;
background: repeating-linear-gradient(
0deg,
#698788 0 1px,
transparent 1px 0.65rem
);
right: 3rem;
top: 3rem;
transform: rotate(10deg);
}
.card-body {
padding: 1.4rem;
display: flex;
flex-direction: column;
flex: 1;
}
.card h2 {
font-size: 1.18rem;
line-height: 1.4;
letter-spacing: -0.025em;
overflow-wrap: anywhere;
}
.card p {
color: var(--muted);
font-size: 0.86rem;
margin: 0.75rem 0 1.4rem;
}
@media (max-width: 680px) {
.intro-heading,
.intro-heading {
gap: 1.25rem;
}
.masthead {
margin-bottom: 2rem;
}
}
.card-art::before,
.art-space::after,
.art-reading::after {
content: '';
}
.card-details {
margin-top: auto;
border-top: 1px solid #e0e3e6;
}
.card-details summary {
display: flex;
align-items: center;
justify-content: space-between;
gap: 1rem;
min-height: 44px;
padding-top: 0.75rem;
list-style: none;
cursor: pointer;
color: var(--blue);
font-size: 0.78rem;
font-weight: 700;
}
.card-details summary::-webkit-details-marker {
display: none;
}
.card-details summary:hover {
text-decoration: underline;
text-underline-offset: 0.2em;
}
.disclosure-icon {
flex: 0 0 1rem;
width: 1rem;
height: 1rem;
position: relative;
}
.disclosure-icon::before,
.disclosure-icon::after {
content: '';
position: absolute;
width: 0.7rem;
height: 1px;
background: currentColor;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.disclosure-icon::after {
transform: translate(-50%, -50%) rotate(90deg);
}
.card-details[open] .disclosure-icon::after {
display: none;
}
.card-note p {
margin: 1rem 0 0;
}
.card-note code {
font-size: 0.85em;
overflow-wrap: anywhere;
}
</style>
</head>
<body>
<main id="main">
<header class="masthead">
<p class="eyebrow">MRHTML / Design notebook</p>
<span class="edition">Six ideas.<br />Room to grow.</span>
</header>
<div class="intro-heading">
<h1>Good patterns.<br />Any screen.</h1>
<p class="intro">
A small collection of useful interface ideas. This grid finds its own
column count, leaving every card enough room to breathe.
</p>
</div>
<section class="card-grid" aria-label="Design pattern cards">
<article class="card">
<div class="card-art art-grid" aria-hidden="true">
<span class="art-label">01 / Structure</span>
</div>
<div class="card-body">
<h2>A flexible grid that fits the space you actually have</h2>
<p>
Let the available width decide how many columns belong in the row.
</p>
<details class="card-details">
<summary>
Read the layout note<span
class="disclosure-icon"
aria-hidden="true"
></span>
</summary>
<div class="card-note">
<p>
The grid uses
<code>repeat(auto-fit, minmax(min(100%, 16rem), 1fr))</code>.
The inner minimum prevents a card from becoming wider than its
container on narrow screens. Cards share the remaining space.
</p>
</div>
</details>
</div>
</article>
<article class="card">
<div class="card-art art-type" aria-hidden="true">
<span class="art-label">02 / Typography</span>
</div>
<div class="card-body">
<h2>Headings that welcome a few extra words</h2>
<p>
Give real content room to wrap without forcing every title onto
two lines.
</p>
<details class="card-details">
<summary>
Read the content note<span
class="disclosure-icon"
aria-hidden="true"
></span>
</summary>
<div class="card-note">
<p>
These cards have no fixed title height or line clamp. Short
and long headings remain visible, while flexible card bodies
keep the reading controls aligned within each row.
</p>
</div>
</details>
</div>
</article>
<article class="card">
<div class="card-art art-focus" aria-hidden="true">
<span class="art-label">03 / Interaction</span>
</div>
<div class="card-body">
<h2>A clear path for the keyboard</h2>
<p>
One native reading control per card keeps the journey predictable
and easy to follow.
</p>
<details class="card-details">
<summary>
Read the keyboard note<span
class="disclosure-icon"
aria-hidden="true"
></span>
</summary>
<div class="card-note">
<p>
Use Tab to move between summaries, then Enter or Space to open
a note. The grid does not visually reorder cards, so the
keyboard path follows the reading order. Native details need
no custom role or keyboard handler.
</p>
</div>
</details>
</div>
</article>
<article class="card">
<div class="card-art art-space" aria-hidden="true">
<span class="art-label">04 / Rhythm</span>
</div>
<div class="card-body">
<h2>Space that does a little of the explaining</h2>
<p>
Consistent gaps and a quiet divider help related ideas stay
together.
</p>
<details class="card-details">
<summary>
Read the spacing note<span
class="disclosure-icon"
aria-hidden="true"
></span>
</summary>
<div class="card-note">
<p>
A repeated card structure creates rhythm. The title and
excerpt stay close together; a divider separates the reading
control. Spacing remains flexible as text wraps, including
when you increase the text size.
</p>
</div>
</details>
</div>
</article>
<article class="card">
<div class="card-art art-motion" aria-hidden="true">
<span class="art-label">05 / Restraint</span>
</div>
<div class="card-body">
<h2>Useful movement, with a quieter option</h2>
<p>
A design can communicate its structure without making anything
move.
</p>
<details class="card-details">
<summary>
Read the motion note<span
class="disclosure-icon"
aria-hidden="true"
></span>
</summary>
<div class="card-note">
<p>
This example has no animation and needs no JavaScript. Its
reduced-motion rule also protects the page if you add movement
later. Any added motion should respect that preference.
</p>
</div>
</details>
</div>
</article>
<article class="card">
<div class="card-art art-reading" aria-hidden="true">
<span class="art-label">06 / Reading</span>
</div>
<div class="card-body">
<h2>A comfortable place for the longer explanation</h2>
<p>
Keep a clear excerpt in the card and the full explanation close at
hand.
</p>
<details class="card-details">
<summary>
Read the reading note<span
class="disclosure-icon"
aria-hidden="true"
></span>
</summary>
<div class="card-note">
<p>
Each card contains a useful local note. Opening a summary
reveals it in place, without navigating away from an embedded
preview. Replace the sample writing with your own resource
descriptions and explanations.
</p>
</div>
</details>
</div>
</article>
</section>
<footer class="footer-note">
An original MRHTML example. Six cards, one responsive CSS grid, no
JavaScript.
</footer>
</main>
</body>
</html>