JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content">
    <div class="card">
    </div>
</div>

CSS

.content {
        height: 350px;
        width: 320px;
        max-width: 350px;
    }
    
    .card {
        background-color: black;
        height: 100%;
        width: 100%;
    }