JSFiddle - React, Tailwind, and code Playground

HTML

<div class="form-wrapper">
  <div class="form"></div>
</div>

CSS

.form {
  position: absolute;
  width: 600px;
  height: 400px;
  background-color: #444;
  border-radius: 50%/4em;
  left: -50px;
}
.form-wrapper {
  position: relative;
  width: 500px;
  overflow: hidden;
  height: 400px;
}