.whatsapp-btn{
  position:fixed;
  right:20px;
  bottom:80px;
  background:#25D366;
  color:#fff;
  padding:14px 18px;
  border-radius:50px;
  box-shadow:0 10px 30px rgba(37,211,102,0.35);
  font-weight:700;
  text-decoration:none;
  display:flex;
  align-items:center;
  gap:10px;
  z-index:9999;
  font-size:1rem;
  transition:transform 0.25s ease, box-shadow 0.25s ease;
}
.whatsapp-btn i{font-size:1.4rem;}
.whatsapp-btn:hover{transform:scale(1.08);}