JSFiddle - React, Tailwind, and code Playground

by Yeah

HTML

<div>Просто текст</div>
<div class="centered">Текст по-центру</div>


<div class="container">
  <div class="header"></div>
  <div class="body-container">
    <div class="sidebar"></div>
    <div class="content"></div>
  </div>
</div>

CSS

.centered {
  text-align: center;
}

.container {
  padding-top: 20px;
  width: 100%;
}

.header {
  height: 100px;
  background-color: red;
}

.sidebar {
  width: 20%;
  background-color: green;
  height: 600px;
  float: left;
}

.content {
  width: 80%;
  float: right;
  background-color: blue;
  height: 600px;
}