.whatsapp-float {
  position: fixed;
  right: clamp(18px, 3vw, 32px);
  bottom: clamp(18px, 3vw, 32px);
  z-index: 80;
  display: grid;
  width: 60px;
  height: 60px;
  place-items: center;
  border: 2px solid #fff;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  box-shadow: 0 10px 28px rgba(7, 31, 62, .28);
  transition: transform .18s ease, box-shadow .18s ease;
}
.whatsapp-float:hover,
.whatsapp-float:focus-visible {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 14px 34px rgba(7, 31, 62, .36);
  outline: 3px solid rgba(187, 149, 98, .75);
  outline-offset: 3px;
}
.whatsapp-float svg {
  width: 33px;
  height: 33px;
  fill: currentColor;
}
@media (max-width: 540px) {
  .whatsapp-float { width: 56px; height: 56px; right: 16px; bottom: 16px; }
  .whatsapp-float svg { width: 30px; height: 30px; }
}
@media (prefers-reduced-motion: reduce) {
  .whatsapp-float { transition: none; }
}