/* Sticky WhatsApp button — fixed bottom-left, floats above all sections/modals */
.whatsapp-fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.whatsapp-fab:hover,
.whatsapp-fab:focus-visible {
  transform: scale(1.08);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35);
}

/* Gentle attention pulse */
.whatsapp-fab::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #25d366;
  z-index: -1;
  animation: whatsapp-fab-pulse 2.4s ease-out infinite;
}

@keyframes whatsapp-fab-pulse {
  0% { transform: scale(1); opacity: 0.6; }
  70%, 100% { transform: scale(1.7); opacity: 0; }
}

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

@media (max-width: 600px) {
  .whatsapp-fab {
    right: 16px;
    bottom: 16px;
    width: 60px;
    height: 60px;
  }
  .whatsapp-fab svg { width: 30px; height: 30px; }
}