width: 500px;
height: 500px;
background:
  radial-gradient(circle at -238% 50%, rgb(42 53 54 / 0) 74%, rgb(42 53 54 / 1) 75%) 280px 50px / 13px 51px no-repeat repeat, /* Right mask */
  radial-gradient(circle at 306% 50%, rgb(42 53 54 / 0) 74%, rgb(42 53 54 / 1) 75%) 219px 32px / 13px 51px no-repeat repeat, /* Left mask */
  linear-gradient(19deg, rgb(255 255 255 / 0) 0%, rgb(255 255 255 / 0.43) 43.29%, rgb(0 0 0 / 0.26) 50%, rgb(0 0 0 / 0) 67.74%, rgb(255 255 255 / 0.36) 100%) 221px 66px / 71px 51px no-repeat repeat, /* Shade */
  linear-gradient(rgb(42 53 54 / 1), rgb(42 53 54 / 1)) 292px 16px / 232px 100px no-repeat repeat, /* Right background */
  linear-gradient(rgb(42 53 54 / 1), rgb(42 53 54 / 1)) -11px 16px / 232px 100px no-repeat repeat, /* Left background */
  linear-gradient(0deg, rgb(69 255 144 / 1) 0%,  50%, rgb(69 168 255 / 1) 100%) 204px 0px / 100px 500px no-repeat no-repeat; /* Gradient */