/* WhatsApp FAB — site-wide (bottom-left, glowing) */
.wa-fab {
  position: fixed;
  left: 22px;
  bottom: 22px;
  z-index: 98;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #25d366;
  color: #fff;
  box-shadow:
    0 10px 28px rgba(37, 211, 102, 0.45),
    0 0 0 0 rgba(37, 211, 102, 0.55);
  transition: transform .2s var(--ease, cubic-bezier(0.33, 1, 0.68, 1)), box-shadow .2s var(--ease, cubic-bezier(0.33, 1, 0.68, 1));
  animation: wa-glow 2.2s ease-out infinite;
}
.wa-fab::before,
.wa-fab::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(37, 211, 102, 0.7);
  pointer-events: none;
  animation: wa-ring 2.2s ease-out infinite;
}
.wa-fab::after { animation-delay: 1.1s; }
.wa-fab svg {
  width: 30px;
  height: 30px;
  position: relative;
  z-index: 1;
  display: block;
}
.wa-fab:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow:
    0 14px 34px rgba(37, 211, 102, 0.55),
    0 0 0 8px rgba(37, 211, 102, 0.16);
}
.wa-fab:focus-visible {
  outline: 3px solid rgba(37, 211, 102, 0.45);
  outline-offset: 4px;
}
@keyframes wa-glow {
  0%, 100% {
    box-shadow:
      0 10px 28px rgba(37, 211, 102, 0.45),
      0 0 0 0 rgba(37, 211, 102, 0.35);
  }
  50% {
    box-shadow:
      0 12px 32px rgba(37, 211, 102, 0.6),
      0 0 0 10px rgba(37, 211, 102, 0.08);
  }
}
@keyframes wa-ring {
  0% { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(1.75); opacity: 0; }
}
@media (max-width: 640px) {
  .wa-fab {
    left: 16px;
    bottom: 16px;
    width: 56px;
    height: 56px;
  }
  .wa-fab svg { width: 26px; height: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  .wa-fab,
  .wa-fab::before,
  .wa-fab::after { animation: none; }
}