JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
 <head>
  <meta charset="utf-8">
  <title>border-radius</title>
  <style>
   .container {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;

    height: 100vh;
    width: 100%;

    background: #f0f0f0;
    border: 1px solid black;
    margin: 5px;
   }
   .item {
    background: #f7f7f7;
    border: 1px solid black;
    margin: 5px;
    padding: 10px;
   }
  </style>
 </head>
 <body>
  <div class="container">
    <div class="item">1</div>
    <div class="item">2</div>
  </div>
 </body>
</html>