JSFiddle - React, Tailwind, and code Playground
HTML
<section class="introduction"></section>
<section class="sign-up"></section>CSS
.introduction { height: calc(100vh - 100px - 8px * 2); margin: 8px 0; background: dodgerblue; }
.sign-up { height: 200px; background: orange; }
section { border-radius: 16px; }