JSFiddle - React, Tailwind, and code Playground

HTML

<div class="grid-container">
  <div class="grid-item">a</div>
  <div class="grid-item">b</div>
  <div class="grid-item">c</div>
  <div class="grid-item">d</div>
  <div class="grid-item">e</div>
  <div class="grid-item">f</div>
  <div class="grid-item">g</div>
  <div class="grid-item">h</div>
</div>

CSS

.grid-container {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  background-color: lightblue;
  padding: 10px;
}

.grid-item {
  background-color: lightgreen;
  border: 1px solid darkblue;
  padding: 20px;
  font-size: 30px;
  text-align: center;
}