// step status

@mixin skeleton-active-background {
  background: linear-gradient(90deg, #f2f2f2 25%, #e6e6e6 37%, #f2f2f2 63%);
  -webkit-animation: skeleton-loading 1.4s ease infinite;
  animation: skeleton-loading 1.4s ease infinite;
  background-size: 400% 100%;
}