.whatsapp-flutuante{
  position:fixed; bottom:24px; right:24px; z-index:40;
  display:flex; align-items:center; gap:10px;
  background:#25D366; color:#05130b; text-decoration:none;
  padding:14px; border-radius:999px;
  box-shadow:0 12px 30px -8px rgba(37,211,102,0.55);
  opacity:0; transform:translateY(12px);
  transition:opacity .4s ease, transform .4s ease, padding .3s ease;
}
.whatsapp-flutuante.esta-visivel{ opacity:1; transform:translateY(0); }
.whatsapp-flutuante svg{ width:24px; height:24px; flex-shrink:0; }
.whatsapp-flutuante__texto{
  max-width:0; overflow:hidden; white-space:nowrap;
  font-size:0.84rem; font-weight:600; transition:max-width .3s ease;
}
.whatsapp-flutuante:hover{ padding:14px 20px 14px 14px; }
.whatsapp-flutuante:hover .whatsapp-flutuante__texto{ max-width:200px; }

@media (max-width:600px){
  .whatsapp-flutuante{ bottom:16px; right:16px; }
}