CSS Container Queries

CSS:

*,
*::before,
*::after {
  box-sizing: border-box;
}

.w-200 {
  max-width: 200px;
}

.w-400 {
  max-width: 400px;
}

.card-container {
  container-type: inline-size;
  width: 100%;
  margin: 0 auto;
  border: 2px dashed grey;
  display: flex;
  flex-wrap: wrap;
}

.card-container--dark {
  container-type: inline-size;
  container-name: container--dark;
}

.card {
  padding: 5px 10px;
  background: linear-gradient(to bottom right, #add8e6, #f0f0f0);
  border-radius: 5px;
  flex: 0 0 100%;
}

@container (inline-size > 300px) {
  .card {
    flex: 0 0 50%;
  }
}

@container (inline-size > 500px) {
  .card {
    flex: 0 0 33.3%;
  }
}

@container container--dark (inline-size > 300px) {
  .card {
    color: white;
    background: linear-gradient(to bottom right, #00008b, #9400d3);
  }
}

HTML:

<h3>1 card per row</h3>
<div class="card-container w-200">
  <div class="card">
    <h4>Title</h4>
    <p>Lorem ipsum dolor sit amet</p>
  </div>

  <div class="card">
    <h4>Another Title</h4>
    <p>Sed do eiusmod tempor incididunt.</p>
  </div>
</div>

<h3>2 cards per row</h3>
<div class="card-container w-400">
  <div class="card">
    <h4>Title</h4>
    <p>Lorem ipsum dolor sit amet</p>
  </div>

  <div class="card">
    <h4>Another Title</h4>
    <p>Sed do eiusmod tempor incididunt.</p>
  </div>
</div>

<h3>3 cards per row</h3>
<div class="card-container">
  <div class="card">
    <h4>Title</h4>
    <p>Lorem ipsum dolor sit amet</p>
  </div>

  <div class="card">
    <h4>Another Title</h4>
    <p>Sed do eiusmod tempor incididunt.</p>
  </div>

  <div class="card">
    <h4>Title</h4>
    <p>Lorem ipsum dolor sit amet</p>
  </div>
</div>

<h3>Example with container-name</h3>

<div class="card-container card-container--dark">
  <div class="card">
    <h4>Title</h4>
    <p>Lorem ipsum dolor sit amet</p>
  </div>

  <div class="card">
    <h4>Another Title</h4>
    <p>Sed do eiusmod tempor incididunt.</p>
  </div>

  <div class="card">
    <h4>Title</h4>
    <p>Lorem ipsum dolor sit amet</p>
  </div>
</div>

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