/* WhatsApp floating action button */
.wa-fab {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25D366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 16px rgba(0,0,0,.2);
  z-index: 9999;               /* above video/nav */
  text-decoration: none;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}
.wa-fab svg {
  width: 28px;
  height: 28px;
  display: block;
  fill: #fff;
}
.wa-fab:active { transform: scale(0.98); }
@media (max-width: 640px) {
  .wa-fab { right: 16px; bottom: 16px; }
}