JSFiddle - React, Tailwind, and code Playground

HTML

<div id="btn__plan">
  <button class="btn__satellite font__body--2 font--middle">Satellite</button>
  <button class="btn__plan font__body--2 font--middle">Plan</button>
</div>

CSS

body {
  background: rgb(238, 182, 63);
  position:relative;
  margin-top:3em;
}
#btn__plan {
  display: flex;
  position: absolute;
  z-index: 1;
  justify-content: center;
  width: calc(100% - 492px);
  right: 0;
  top: 10px;
}

.btn__satellite,
.btn__plan {
  padding: 10px 0;
  width: 80px;
  background-color: white;
  border: 1px solid var(--gray-middle);
  box-shadow: 0 0 5px rgb(49, 49, 49);
}

.btn__satellite {
  border-radius: 50px 0 0 50px;
  border-right: none;
}

.btn__plan {
  border-radius: 0 50px 50px 0;
}