JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <span>This is a box</span>
    <a href="#">Yep</a>
</div>

CSS

body {
    background:#25242d;
    margin:80px;
}
div {
    background:white;
	border-radius: 5px 8px 8px 5px;
}
span {
    padding:10px;
    display:inline-block;
}
a {
    color:white;
    float:right;
    display:block;
    background:#201f23;
    padding:10px 20px;
    border-radius: 0 5px 5px 0;
}