body::before{
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none; /* so you can still click stuff */
  
  background-image: url("https://static.cargo.site/assets/backdrop/video/noise.png");
  opacity: 0.88; /* adjust strength */
  z-index: 9999;
}

body {
  background-color: #32373c;
  
}