JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="item">絶対配置</div>
</div>
<div class="container container-relative">
  <div class="item">絶対配置</div>
</div>

CSS

.container {
  display: grid;
  grid: 2em 2em 2em / 1fr 1fr 1fr;
  margin: 1em 0;
  background-color: #6ef;
}
.container-relative {
  position: relative;
}
.item {
  grid-area: 2 / 2 / span 1 / span 2;
  position: absolute;
  background-color: #09f;
}