:root {
  --color-background-primary: #FFF;
  --color-background-secondary: #DDD;
  --color-foreground-primary: #222;
  --color-foreground-secondary: #333;
}
@media (prefers-color-scheme: dark) {
  :root {
    --color-background-primary: #222;
    --color-background-secondary: #333;
    --color-foreground-primary: #DDD;
    --color-foreground-secondary: #AAA;
  }
}