JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <h1>some title</h1>
  <div class="grid">
    <div>line 1</div>
    <div>line 2</div>
  </div>
</div>

CSS

.container {
  display: grid;
  min-height: 100vh;
  grid-template-rows: min-content 1fr;
}

.grid {
  background-color: red;
  padding: 1rem;
  grid-gap: 1rem;
  display: grid;
  grid-template-rows: 1fr auto;
}

.grid>* {
  background-color: white;
}