JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="row">
    <div class="left">
      <h1>
      test
      </h1>
    </div>
    <div class="right">
      <h2>
      more information here.
      </h2>
    </div>
  </div>
  <div class="row">
    <div class="left">
      <h1>
      test
      </h1>
    </div>
    <div class="right">
      <h2>
      more information here.
      </h2>
    </div>
  </div>
</div>

CSS

.row {
  border-bottom: 1px solid black;
  border-top: 1px solid black;
  width: 100%;
  height: 100px;

}

.left {
  float: left;
  width: 200px;
}

.right {
  float: left;
  width: 400px;
}

.container {
  width: 600px;
  height: 600px;
  margin: 20px
  display: block;
}