.placeholder {
  display: inline-block;
  color: transparent;
  background: #fff;
  opacity: 0.15;
  border-radius: 2px;
  animation: 1s loading-placeholder ease-in-out infinite;
  position: relative;
  top: 10%;
  height: 80%;

  &.color-black {
    background: #000;
  }

  &.color-white {
    background: #fff;
  }
}

@keyframes loading-placeholder {
  0% {
    opacity: 0.15;
  }
  50% {
    opacity: 0.3;
  }
  100% {
    opacity: 0.15;
  }
}