JSFiddle - React, Tailwind, and code Playground

HTML

<nav>
link
</nav>

<div id="element1">
</div>

<div id="element2">
</div>

<div id="element3">
</div>

CSS

.wrapper {
  height: 100px;
}

nav {
  position: fixed;
  width: 100%;
  color: white;
  text-align: center;
 }

#element1 {
  height: 50vh;
  background-color: gray;
}

#element2 {
  height: 20vh;
  background-color: white;
}

#element3 {
  height: 100vh;
  background-color: black;
}