.loader {
  width: 150px;
  height: 100px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 4px;
}

.loader div {
  width: 12px;
  height: 10%;
  background-color: #d9e7f5;
  border-radius: 4px 4px 0 0;
  animation: wave 3.2s cubic-bezier(0.5, 0.2, 0.3, 1) infinite;
  transform-origin: bottom;
  box-shadow: 0 0 10px #578fca;
}

@keyframes wave {
  0%,
  100% {
    height: 10%;
  }
  25% {
    height: 100%;
  }
  50% {
    height: 50%;
  }
  75% {
    height: 75%;
  }
}

.loader div:nth-child(1) {
  animation-delay: 0.3s;
}
.loader div:nth-child(2) {
  animation-delay: 0.2s;
}
.loader div:nth-child(3) {
  animation-delay: 0.1s;
}
.loader div:nth-child(4) {
  animation-delay: 0.01s;
}
.loader div:nth-child(5) {
  animation-delay: 0.1s;
}
.loader div:nth-child(6) {
  animation-delay: 0.2s;
}
.loader div:nth-child(7) {
  animation-delay: 0.3s;
}