JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">

  <header>
    <h1>Header area</h1>
  </header>

  <section class="content">
    <h2>This is a section</h2>
    <div class="message">
      <p class="text">This section is empty</p>
    </div>
  </section>

</div>

CSS

html, body {
  margin: 0;
}
.container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}
header {}
.content {
  position: relative;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.content h2 {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  text-align: center;
}
.message {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.message .text {
  font-size: 20px;
}


/* styles for this demo */
html, body {
  margin: 0;
}
.container {
}
header {
  border: 1px dotted red;  
}
.content {
  border: 1px dotted red;
}
.message,
.message .text {
  border: 1px dotted red;
}