.loader {
  --color: #a5a5b0;
  --size: 30px;
  width: var(--size);
  height: var(--size);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.loader span {
  width: 100%;
  height: 100%;
  background-color: var(--color);
  animation: keyframes-blink .5s alternate infinite linear;
}

.loader span:nth-child(1) {
  animation-delay: 0ms;
}

.loader span:nth-child(2) {
  animation-delay: 150ms;
}

.loader span:nth-child(3) {
  animation-delay: 150ms;
}

.loader span:nth-child(4) {
  animation-delay: 280ms;
}

@keyframes keyframes-blink {
  0% {
    opacity: 0.5;
    transform: scale(0.5) rotate(20deg);
  }

  50% {
    opacity: 1;
    transform: scale(1);
  }
}