Most side projects never get polished because developers get stuck tweaking CSS. Starting points like CSS Bed help, but lack customization.
An interactive theme builder where you adjust colors, spacing, typography visually, then export clean CSS for various frameworks.
Free tier with basic themes, premium for advanced customization and framework exports. Agencies might pay for team access.
MVP: A few preset themes with sliders for main variables.
Risk: Many similar tools exist - need better UX and exports.