JSFiddle - React, Tailwind, and code Playground
HTML
<DOCTYPE HTML!>
<html>
<head>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div class="kontejner">
</div>
</html>CSS
.kontejner
{
background-color: blue;
border-radius: 50px;
width: 300px;
height: 100px;
}