.whatsapp-float {
  position: fixed;
  z-index: 10000;
  left: max(18px, env(safe-area-inset-left));
  bottom: max(18px, env(safe-area-inset-bottom));
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  box-shadow: 0 8px 24px rgba(16, 24, 40, .22);
  text-decoration: none;
  transition: transform .2s ease, background-color .2s ease;
}

.whatsapp-float:hover {
  transform: translateY(-3px);
  background: #1fb95a;
}

.whatsapp-float:focus-visible {
  outline: 3px solid #101828;
  outline-offset: 3px;
}

.whatsapp-float svg {
  width: 31px;
  height: 31px;
  fill: currentColor;
}

@media (max-width: 600px) {
  .whatsapp-float {
    left: max(14px, env(safe-area-inset-left));
    bottom: max(14px, env(safe-area-inset-bottom));
    width: 54px;
    height: 54px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .whatsapp-float { transition: none; }
}