:root {
  /* Match legacy site code-block contrast */
  --hl-bg: #212121;
  --hl-color: #eff;
}

#web_bg {
  position: fixed;
  z-index: -999;
  width: 100%;
  height: 100%;
  background: url(https://source.fomal.cc/img/dm3.webp);
  background-attachment: local;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}