.bg-grid {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background:
    radial-gradient(ellipse at 10% 20%, rgba(230, 57, 70, 0.15) 0%, transparent 40%),
    radial-gradient(ellipse at 90% 80%, rgba(212, 175, 55, 0.12) 0%, transparent 40%),
    radial-gradient(ellipse at 50% 50%, rgba(192, 192, 192, 0.05) 0%, transparent 60%);
  z-index: 0;
}