<div class="container">
  <div class="item">long content long content long content long content long content</div>
  <div class="item">1</div>
  <div class="item">2</div>
  <div class="item">3</div>
  <div class="item">4</div>
  <div class="item">5</div>
  <div class="item">6</div>
  <div class="item">7</div>
  <div class="item">8</div>
</div>

html {
  background: #f6faff;
}

.container {
  display: grid;
  grid-auto-columns: minmax(15rem, auto);
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  grid-gap: 1rem;
}
.item {
  background: #f1e9f7;
  border: 3px solid #a579cc;
  color: #a579cc;
  padding: 2rem;
  font-size: 2rem;
  text-align: center;
}