:root {
  --surface-base: #150509;
  --surface-background:
    radial-gradient(ellipse 44% 56% at 48% -5%, rgba(166, 75, 65, .47) 0%, rgba(118, 46, 46, .4) 35%, transparent 100%),
    radial-gradient(ellipse 30% 80% at -5% 62%, rgba(132, 30, 59, .52), transparent 100%),
    radial-gradient(ellipse 30% 45% at 106% 104%, rgba(126, 60, 36, .26), transparent 90%),
    var(--surface-base);
}