.loader {
  width: 300px;
  height: 150px;
}

.loader .avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: #ccc;
  animation: pulse 1.5s infinite ease-in-out;
}

@keyframes pulse {
  0% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  100% {
    opacity: 0.6;
  }
}