JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
  <h1>hello world</h1>
  <button>buy</button>
</div>

CSS

body {
  margin: 0;
}

.wrap {
  display: flex;
}

.wrap h1 {
  margin: 0 auto;
  margin-right: -70px;
}

.wrap button {
  margin-left: auto;
  width: 70px;
  border: none;
  padding: 10px 20px;
  background-color: #f39c12;
  color: #fff;
  text-transform: uppercase;
}