JSFiddle - React, Tailwind, and code Playground

by Pritam Bohra

HTML

<html>
  <body>
    <div class="container">
      <div class="header"></div>
      <div class="side-nav"></div>
      <div class="main-content"></div>
      <div class="footer"></div>
    </div>
  </body>
</html>

CSS

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

.container {
  position: relative;
  height: 100%;
}

.header {
  background-color: skyblue;
  height: 10%;
}

.footer {
  background-color: goldenrod;
  /* position: absolute; */
  /* bottom: 0; */
  height: 5%;
  z-index: 10000;
}

.main-content {
  background-color: grey;
  width: 75%;
  padding-bottom: 20px;
  height: 85%;
  float: left;
}

.side-nav {
  background-color: #ff0000;
  width: 25%;
  height: 85%;
  float: left;
}

.side-nav::after {
  content: "";
  clear: both;
  display: table;
}