.btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #25D366;
  color: #fff;
  padding: 12px 20px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  z-index: 999;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  transition: all 0.3s ease;
  position: fixed;
}

[dir="rtl"] .btn { right: auto; left: 24px; }

.btn:hover {
  transform: scale(1.05) translateY(-2px);
  box-shadow: 0 8px 30px rgba(37, 211, 102, 0.5);
  background: #20ba5a;
}

.icon { display: flex; align-items: center; }

.label { font-size: 0.88rem; }

.pulse {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 14px;
  height: 14px;
  background: var(--neon-orange);
  border-radius: 50%;
  border: 2px solid #0A0A0A;
  animation: glow-pulse 2s ease-in-out infinite;
}

@media (max-width: 480px) {
  .label { display: none; }
  .btn { padding: 12px; border-radius: 50%; width: 50px; height: 50px; justify-content: center; }
}