JSFiddle - React, Tailwind, and code Playground

HTML

<div>
  <nav>
  </nav>
</div>

CSS

*{
  padding: 0;
  margin: 0;
  font-size: 0;
  line-height: 0;
}
div{
  min-height: 100vh;
  border: 0.5vw solid red;
  width: 100%;
  box-sizing: border-box;
}
nav{
  background: black;
  height: 11vh;
}