.whatsapp-fab {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: #25D366; /* verde oficial de WhatsApp */
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 10px 20px rgba(0,0,0,.18), 0 6px 6px rgba(0,0,0,.12);
    transition: transform .18s ease, box-shadow .18s ease;
    z-index: 9999;
  }
  .whatsapp-fab img{
	  width:48px;
  }
  .whatsapp-fab:hover,
  .whatsapp-fab:focus-visible,
  .whatsapp-fab:active {
    transform: scale(1.08);
    box-shadow: 0 12px 24px rgba(0,0,0,.22), 0 8px 8px rgba(0,0,0,.16);
  }
  .whatsapp-fab:focus { outline: none; }
  @media (max-width: 480px) {
    .whatsapp-fab { width: 56px; height: 56px; }
  }