JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="box1">Box1</div>
  <div class="box2">Box2</div>
  <div class="box3">Box3</div>
  <div class="box4">Box4</div>
</div>

CSS

.container {
  display: grid;
  grid-template-columns: auto auto;
  justify-content: space-between;
  align-content: space-between;
  height: 300px;
  background-color: lightgray;
  border: 1px solid black;
}

.container > div {
  background-color: yellow;
}