JSFiddle - React, Tailwind, and code Playground

HTML

<div class="item1">
  lorem222
</div>
<div class="container">
  Lorem ipsum dolor sit amet, consectetur adipisicing elit. Consectetur, architecto.
</div>

CSS

.item1{
  width: 100%;
  max-width: 80%;
  margin: auto;
  color: white;
  padding: 20px;
  background: green;
}


.container{
  width: 100%;
  max-width: calc(90% - 20px);
  margin-left: auto;
  margin-right: 0;
  padding: 20px;
  background: tomato;
}