<a href="#" class="cle-flip">
  <span class="cle-flip-inner">
    <span class="cle-flip-front">Get Started</span>
    <span class="cle-flip-back">Learn More →</span>
  </span>
  <span class="cle-flip-ghost" aria-hidden="true">Learn More →</span>
</a>

.cle-flip {
  position: relative;
  display: inline-block;
  height: 40px;
  padding: 0 22px;
  perspective: 800px;
  text-decoration: none;
  font:
    700 13px/40px ui-monospace,
    monospace;
  letter-spacing: 0.12em;
}
/* Invisible ghost claims the wider of the two faces so the chip width is stable */
.cle-flip-ghost {
  visibility: hidden;
  white-space: nowrap;
}
.cle-flip-inner {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transition: transform 0.55s cubic-bezier(0.65, 0, 0.35, 1);
}
.cle-flip-front,
.cle-flip-back {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  white-space: nowrap;
}
.cle-flip-front {
  background: #7c6cff;
  color: #fff;
}
.cle-flip-back {
  background: #2eb88a;
  color: #0a0f0c;
  transform: rotateY(180deg);
}
.cle-flip:hover .cle-flip-inner,
.cle-flip:focus-visible .cle-flip-inner {
  transform: rotateY(180deg);
}