<div class="example-grid">
  <div class="grid-cell">
    <p>Grid Cell #1</p>
  </div>
  <div class="grid-cell">
    <p>Grid Cell #2</p>
  </div>
  <div class="grid-cell">
    <p>Grid Cell #3</p>
  </div>
  <div class="grid-cell">
    <p>Grid Cell #4</p>
  </div>
  <div class="grid-cell">
    <p>Grid Cell #5</p>
  </div>
  <div class="grid-cell">
    <p>Grid Cell #6</p>
  </div>
  <div class="grid-cell">
    <p>Grid Cell #7</p>
  </div>
  <div class="grid-cell">
    <p>Grid Cell #8</p>
  </div>
  <div class="grid-cell">
    <p>Grid Cell #9</p>
  </div>
</div>
*,
*:before,
*:after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Helvetica Neue", "Helvetica", "Arial", sans-serif;
  font-size: 16px;
  line-height: 1.6em;
  padding: 20px;
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  column-gap: 20px;
  row-gap: 20px;
}

.example-grid > .grid-cell {
  background: #eee;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

@media screen and (min-width: 768px) {
  .example-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

External CSS

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External JavaScript

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