.zalo-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  text-decoration: none;
}

.zalo-wrapper {
  position: relative;
  width: 60px;
  height: 60px;
}

.zalo-wrapper img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
}

/* Vòng tròn hiệu ứng */
.pulse-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: rgba(0, 123, 255, 0.5);
  animation: pulse-ring 1.5s infinite;
  z-index: 1;
}

/* Animation tỏa tròn */
@keyframes pulse-ring {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  70% {
    transform: scale(1.8);
    opacity: 0;
  }
  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}