ScrollShadow.css

background:
    linear-gradient( 90deg, white 0%, rgba(255,255,255,0)),
    linear-gradient(-90deg, white 0%, rgba(255,255,255,0)) 100% 0,
    radial-gradient(
      farthest-side at 0% 50%,
      rgba(0,0,0,1),
      rgba(0,0,0,0.3)
    ),
    radial-gradient(
      farthest-side at 100% 50%,
      rgba(0,0,0,1),
      rgba(0,0,0,0.3)
    ) 100% 0%;
  background-repeat: no-repeat;
  background-color: #fff;
  background-size: 100px 100%, 100px 100%, 14px 100%, 14px 100%;
  background-attachment: local, local, scroll, scroll;
  z-index: 10;