Getting started with CSS container queries | MDN Blog

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</div>

*,
*::before,
*::after { box-sizing: border-box;
} body { margin: 0; min-height: 100vh; background: whitesmoke; font-family: Montserrat, sans-serif; line-height: 1.3;
} img { display: block; width: 100%; aspect-ratio: 3 / 2; object-fit: cover;
} ul { list-style: none; padding: 0; margin: 0;
} h2 { padding-bottom: 0.2em; margin: 0 0 0.6em; border-bottom: 2px solid;
} article * { margin: 0;
} aside { background: #f5f8ff; padding: var(--gap);
} .wrapper { max-width: 1650px; margin: 0 auto; padding: clamp(1rem, 10cqi, 3rem); background: white;
} h3 { font-size: 1.3em; margin-bottom: 0.2em; line-height: 1.24;
} .wrapper-container { container: wrapper / inline-size;
} .wrapper { --gap: clamp(1rem, 5cqi, 2rem); display: grid; gap: var(--gap);
} @container wrapper (min-width: 1250px) { .wrapper { grid-template-columns: 4fr 1fr; }
} .grid-container { container: layout / inline-size;
} .grid { display: grid; gap: var(--gap); margin-top: var(--gap);
} @container layout (inline-size > 800px) { .grid { grid-template-columns: repeat(2, 1fr); } .article-container:first-child { grid-column: span 2; }
} @container layout (inline-size > 1000px) { .grid { grid-template-columns: repeat(4, 1fr); } .article-container:first-child { grid-column: span 4; } .article-container:nth-child(2), .article-container:nth-child(3) { grid-column: span 2; }
} .article-container { container: article / inline-size;
} article { display: grid; gap: calc(var(--gap) * 0.6); font-size: clamp(0.9rem, 3cqi, 1.75rem);
} @container style(--featured: true) { article { position: relative; overflow: hidden; border-radius: 0.2rem; background: #e1e7f5; padding: calc(var(--gap) * 0.8); } article::before { content: ""; width: 2.75rem; aspect-ratio: 1; position: absolute; top: -0.35rem; left: -0.35rem; border-radius: 50%; background-color: #7e9bde; background-position: center; background-size: 70%; background-repeat: no-repeat; background-image: url("data:image/svg+xml,%3C%3Fxml version='1.0' %3F%3E%3Csvg baseProfile='tiny' height='24px' id='Layer_1' version='1.2' viewBox='0 0 24 24' width='24px' xml:space='preserve' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3E%3Cg%3E%3Cg%3E%3Cpath d='M9.362,9.158c0,0-3.16,0.35-5.268,0.584c-0.19,0.023-0.358,0.15-0.421,0.343s0,0.394,0.14,0.521 c1.566,1.429,3.919,3.569,3.919,3.569c-0.002,0-0.646,3.113-1.074,5.19c-0.036,0.188,0.032,0.387,0.196,0.506 c0.163,0.119,0.373,0.121,0.538,0.028c1.844-1.048,4.606-2.624,4.606-2.624s2.763,1.576,4.604,2.625 c0.168,0.092,0.378,0.09,0.541-0.029c0.164-0.119,0.232-0.318,0.195-0.505c-0.428-2.078-1.071-5.191-1.071-5.191 s2.353-2.14,3.919-3.566c0.14-0.131,0.202-0.332,0.14-0.524s-0.23-0.319-0.42-0.341c-2.108-0.236-5.269-0.586-5.269-0.586 s-1.31-2.898-2.183-4.83c-0.082-0.173-0.254-0.294-0.456-0.294s-0.375,0.122-0.453,0.294C10.671,6.26,9.362,9.158,9.362,9.158z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"); }
} @container article (inline-size > 500px) { article { grid-template-columns: 1fr 2fr; }
} @container article (inline-size > 800px) { article { grid-template-columns: 1fr 1fr; gap: var(--gap); }
}