/* whatsapp-button.css — drop this next to your HTML files */
.wa-float{
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25D366;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(0,0,0,.2);
  text-decoration: none;
  z-index: 9999;
  transition: transform .15s ease, box-shadow .2s ease, opacity .2s;
}
.wa-float:hover{ transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,.28); }
@media (max-width:480px){
  .wa-float{ bottom: 12px; right: 12px; width: 52px; height: 52px; }
}