/* Page background layers (starfield + network canvas) */
body::before {
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:radial-gradient(1.5px 1.5px at 18% 30%,#b8f3ff,transparent),radial-gradient(1.5px 1.5px at 62% 18%,#b8f3ff,transparent),radial-gradient(2px 2px at 82% 62%,#3a9bf8,transparent),radial-gradient(1.5px 1.5px at 35% 80%,#b8f3ff,transparent);
  background-size:520px 520px;
  animation:twk 5s ease-in-out infinite
}

nav,header,section,footer,.wave {
  position:relative;
  z-index:1
}

#bg {
  position:fixed;
  inset:0;
  width:100%;
  height:100%;
  z-index:0;
  pointer-events:none;
  opacity:.7
}