JSFiddle - React, Tailwind, and code Playground

by rikazavr

HTML

<div class="btn">
  кнопка
</div>

CSS

.btn {
  width: 300px;
  padding: 30px;
  margin: 0 auto;
  border: double 1em transparent;
  border-radius: 50px;
  text-align: center;
  background-image: linear-gradient(white, white), 
                    linear-gradient(to left, #171617 , #373838);
  background-origin: border-box;
  background-clip: padding-box, border-box;
}