CSS-only dark mode in Tailwind

@import "tailwindcss";

@theme {
  --color-background: #fff;
  --color-foreground: #000;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #000;
    --color-foreground: #fff;
  }
}

@layer base {
  body {
    background-color: var(--color-background);
    color: var(--color-foreground);
  }
}