body {
  background: radial-gradient(circle at 20% 18%, #1b4dff, transparent 55%),
    radial-gradient(circle at 85% 10%, #00b7ff, transparent 40%),
    radial-gradient(circle at 10% 90%, #3b1cff, transparent 45%),
    linear-gradient(140deg, #050f3d, #071a5c);
}