.whatsapp-float {
  position: fixed;
  right: 24px;
  top: 50%;
  z-index: 1000;
  display: grid;
  width: 60px;
  height: 60px;
  place-items: center;
  border: 2px solid #ffffff;
  border-radius: 50%;
  background: #25d366;
  box-shadow: 0 10px 26px rgba(8, 38, 25, 0.28);
  transform: translateY(-50%);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.whatsapp-float::before {
  position: absolute;
  inset: -8px;
  border: 2px solid rgba(37, 211, 102, 0.55);
  border-radius: 50%;
  content: "";
  opacity: 0;
  pointer-events: none;
  animation: whatsapp-pulse 2.2s ease-out infinite;
}

.whatsapp-float:hover,
.whatsapp-float:focus-visible {
  transform: translateY(-50%) scale(1.08);
  box-shadow: 0 14px 30px rgba(8, 38, 25, 0.34);
}

.whatsapp-float img {
  display: block;
  width: 31px;
  height: 31px;
}

@media (max-width: 620px) {
  .whatsapp-float {
    right: 16px;
    width: 54px;
    height: 54px;
  }
}

@keyframes whatsapp-pulse {
  0% { transform: scale(0.8); opacity: 0; }
  25% { opacity: 0.65; }
  100% { transform: scale(1.42); opacity: 0; }
}

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