.whatsapp-fab{
  position:fixed;
  z-index:40;
  right:clamp(18px,2.4vw,36px);
  bottom:clamp(18px,2.4vw,34px);
  display:grid;
  place-items:center;
  width:62px;
  height:62px;
  border-radius:50%;
  background:#25d366;
  color:#fff;
  box-shadow:0 12px 30px rgba(13,55,35,.28);
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease;
}
.whatsapp-fab svg{width:34px;height:34px;fill:currentColor}
.whatsapp-fab:hover{background:#20bd5a;transform:translateY(-3px);box-shadow:0 16px 34px rgba(13,55,35,.35)}
.whatsapp-fab:focus-visible{outline:3px solid #fff;outline-offset:3px}
@media(max-width:600px){.whatsapp-fab{width:56px;height:56px}.whatsapp-fab svg{width:31px;height:31px}}