Project: demo-blog-engine · Branch: feat/dark-mode · Mode: default · Model: claude-haiku-4-5 Summary Added a dark-mode toggle using CSS custom properties and prefers-color-scheme. The toggle writes to localStorage so the choice persists across navigations. Conversation Turn 1 — User Add a dark mode toggle. Should respect system preference by default but override on click. Turn 1 — Assistant Using data-theme on and swapping CSS custom properties. The toggle button writes localStorage.setItem('theme', next), and a tiny inline script in reads it before first paint to avoid a flash. Tools used in this turn: - Edit: public/style.css — added [data-theme="dark"] vars - Write: templates/theme-init.html (5-line preview) - Edit: templates/base.html — included the init snippet Connections - demo-blog-engine — project - DarkMode — concept - CSSCustomProperties — concept