<a href="#" class="-btn -bg -txt">
  BUTTON
</a>

<br>

<a href="#" class="-btn -bg -txt">
  <div>
    BUTTON<br>
    <span class="-xs">
      Please Touch me!
    </span>
  </div>
</a>

a {
  text-decoration: none;
}

.-btn {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 216px;
  height: 56px;
  text-align: center;
  border-radius: 12px;
}

.-btn:hover {
  opacity: .8;
}

.-bg {
  background: #1c449b;
}

.-txt {
  color: #fff;
}

.-xs {
  font-size: 12px;
}