#particles-js {
  width: 100%;
  height: 100%;
  background-image: url(./../images/breadcrumbs.jpg);
  background-size: cover;
  background-position: 50% 50%;
  background-repeat: no-repeat;
  position: relative;
}

#particles-js::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, .2);
}