.skeleton {
  position: relative;
  overflow: hidden;
  transform: translate3d(0, 0, 0);

  &::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    right: 0;
    animation: skeleton-animation 1s linear infinite alternate;
  }

  &.skeleton-gradient {
    &::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      right: 0;
      background-color: var(getCssVar(skeleton-background-from));
    }

    &::after {
      background: linear-gradient(
        90deg,
        hsla(0, 0%, 0%, 0),
        var(getCssVar(skeleton-background-to)),
        hsla(0, 0%, 0%, 0)
      );
      transform: translateX(-100%);
      animation: skeleton-gradient-animation 1.5s linear infinite;
    }
  }
}

@keyframes skeleton-animation {
  0% {
    background-color: var(getCssVar(skeleton-background-from));
  }
  100% {
    background-color: var(getCssVar(skeleton-background-to));
  }
}

@keyframes skeleton-gradient-animation {
  100% {
    transform: translateX(100%);
  }
}