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Dark Mode Toggle with CSS

šŸ“‹ The Prompt — Copy & Paste Ready
Act as a senior front-end developer with 5+ years of experience in responsive design. Create a step-by-step guide for implementing a dark mode toggle using only CSS (no JavaScript). Include: 1. A [COLOR_SCHEME] media query to detect system preferences 2. CSS variables for [LIGHT_THEME_COLORS] and [DARK_THEME_COLORS] 3. A toggle switch styled with pure CSS that persists the user's preference using the :checked pseudo-class 4. Smooth transitions between themes using [TRANSITION_DURATION] Provide the complete CSS code with comments explaining each section. Focus on accessibility (contrast ratios) and fallbacks for older browsers.

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Frequently Asked Questions

To create a dark mode toggle with CSS, use the `prefers-color-scheme` media query or a class-based approach with JavaScript. This allows users to switch between light and dark themes seamlessly while maintaining readability.
Key CSS properties for dark mode include `background-color`, `color`, and `border-color` to ensure contrast. Using CSS variables like `--bg-dark` and `--text-light` makes theme switching smoother and more maintainable.
Yes, you can use the `prefers-color-scheme` media query to enable dark mode based on the user's system settings. However, adding a toggle requires JavaScript to override system preferences for manual control.
Store the user's theme choice in `localStorage` or cookies to persist across sessions. Combine this with JavaScript to apply the saved preference on page load for a consistent experience.
Dark mode reduces eye strain and improves readability in low-light environments. Proper contrast and color choices ensure compliance with WCAG guidelines, making your site more inclusive.
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