.loader {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 150px;
  height: 150px;
  transform-style: preserve-3d;
  perspective: 800px;
}

.cube {
  position: absolute;
  width: 50px;
  height: 50px;
  transform-style: preserve-3d;
  animation: cube-fall 3s ease-in-out infinite;
}

.cube:nth-child(1) {
  left: 0;
  animation-delay: 0s;
  background: linear-gradient(45deg, #ff3cac, #784ba0);
}

.cube:nth-child(2) {
  left: 50px;
  animation-delay: 0.3s;
  background: linear-gradient(45deg, #00ffcc, #00b7eb);
}

.cube:nth-child(3) {
  left: 100px;
  animation-delay: 0.6s;
  background: linear-gradient(45deg, #ffdb58, #ff6b6b);
}

.cube::before,
.cube::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  background: inherit;
  opacity: 0.7;
}

.cube::before {
  transform: rotateX(90deg);
  transform-origin: top;
}

.cube::after {
  transform: rotateY(90deg);
  transform-origin: left;
}

@keyframes cube-fall {
  0% {
    transform: translateY(-100px) rotateX(0deg) rotateY(0deg);
    opacity: 0;
  }
  20% {
    transform: translateY(0) rotateX(360deg) rotateY(360deg);
    opacity: 1;
  }
  80% {
    transform: translateY(0) rotateX(360deg) rotateY(360deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100px) rotateX(720deg) rotateY(720deg);
    opacity: 0;
  }
}