JSFiddle - React, Tailwind, and code Playground

HTML

<body>
        <div class="container10">
            <p>test</p>
        </div>
        
    </body>

CSS

.container10

{

border:1px solid #000000;

background: #00FF00;

padding:0px 0px 0px 0px;

width:280px;

height:264px;

margin:0 auto;

}