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My whole theme system is eleven lines. Dark mode should not need a framework.

const root = document.documentElement;
const saved = localStorage.getItem("theme");

if (saved) root.dataset.theme = saved;
else if (matchMedia("(prefers-color-scheme: dark)").matches)
  root.dataset.theme = "dark";

What should I build next? I have one weekend and too much coffee.

Studio wall, November. Prints, receipts, a broken watch I refuse to throw away.

満足 is not more. It is enough.

Mika Sato · notebook, 2026

Small rule I keep: one accent color, two typefaces, three border weights.

Constraints make the thing feel designed. Unlimited options make it feel like a template.

Evening train home. 18:48. The window turns the city into film.