.fcb-group {
  position: fixed;
  bottom: 150px;
  z-index: 999999;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.fcb-left { left: 15px; }
.fcb-right { right: 15px; }

.fcb-btn {
  width: 65px;
  height: 65px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-decoration: none;
  transition: 0.3s ease;
}

.fcb-btn i { font-size: 28px; }

.fcb-btn:hover { transform: scale(1.1); }

.fcb-animate {
  animation: fcb-pulse 3s infinite;
}

@keyframes fcb-pulse {
  0% { box-shadow: 0 0 0 0 rgba(0,0,0,0.4); }
  70% { box-shadow: 0 0 0 15px rgba(0,0,0,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,0,0,0); }
}

@media(min-width:768px){
  .fcb-mobile-only { display:none; }
}