01 When dark mode makes sense
Products for long screen sessions, tech/creative brands, and sites with a night/neon atmosphere. For "sunny" lifestyle brands, a light theme can be stronger.
02 Design rules
Don't blindly invert colors. Boost text contrast, reduce pure #000 areas, and check your logos and illustrations.
03 Implementation
CSS variables, prefers-color-scheme plus a manual toggle saved to localStorage. Accessibility testing is mandatory.
