.whatsapp-float {
  position: fixed;
  z-index: 80;
  right: max(20px, env(safe-area-inset-right));
  bottom: max(20px, env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border: 3px solid var(--burgundy, #650031);
  border-radius: 50%;
  background: #fff;
  box-shadow: 4px 4px 0 var(--burgundy, #650031);
  transition: transform .18s ease, box-shadow .18s ease;
}

.whatsapp-float:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--burgundy, #650031);
}

.whatsapp-float:focus-visible {
  outline: 4px solid var(--cyan, #5cdfe6);
  outline-offset: 3px;
}

.whatsapp-float img {
  display: block;
  width: 32px;
  height: 32px;
}

@media (max-width: 620px) {
  .whatsapp-float {
    right: max(14px, env(safe-area-inset-right));
    bottom: max(14px, env(safe-area-inset-bottom));
    width: 54px;
    height: 54px;
  }
}

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