.contact-btn {
  position: fixed;
  z-index: 9999;
  left: 20px;
  bottom: 20px;
  background-color: #000000; /* تک‌رنگ */
  color: white;
  border: none;
  border-radius: 50px;
  padding: 15px 20px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-btn:hover {
  box-shadow: 0 6px 15px rgba(0,0,0,0.3);
}

.contact-btn.animate-focus {
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(0, 0, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 0, 0, 0); }
}

.overlay {
  position: fixed;
  z-index: 9999;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
}

.overlay.active {
  opacity: 1;
  visibility: visible;
}

.contact-panel {
  background: white;
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transform: translateY(30px);
  transition: transform 0.3s ease;
}

.overlay.active .contact-panel {
  transform: translateY(0);
}

.option-btn {
  padding: 10px 20px;
  border: none;
  background: #f0f0f0;
  cursor: pointer;
  transition: background-color 0.2s ease;
  border-radius: 8px;
}

.option-btn:hover {
  background-color: #e0e0e0;
}

@media (max-width: 768px) {
  .contact-btn {
    bottom: 10px; /* فاصله بیشتر در موبایل */
  }
}