JSFiddle - React, Tailwind, and code Playground

HTML

<button>salut masklinn</button>

CSS

button {
    border: 1px solid red;
    font-size: 200%;
    font-family: garamond;
    padding: 1em;
    border-radius: 0 1000px 1000px 0 / 0 500px 500px 0;
}