Underscores is a minimal starter theme designed for developers who build custom themes from the ground up. It provides a clean, standards-compliant codebase as a foundation, avoiding pre-made design choices so you can implement your own vision.

• Lean, Modern Codebase: Offers a just-right amount of well-commented, modern HTML5 templates and starter CSS. This organized structure helps you start development quickly without unnecessary bulk.
• Development-Focused Features: Includes custom template tags to keep code clean and prevent duplication, along with small template functions to improve the theming workflow. It also provides a helpful 404 template.
• Responsive & Layout Ready: Comes with a script for mobile-friendly navigation menus and includes sample CSS layouts for sidebars. The ultra-minimal default styling is intentionally plain to stay out of your way during design.
• Hackable Foundation: Explicitly meant to be modified directly, not used as a parent theme. It's a blank slate licensed under GPLv2, intended to be transformed into a unique, final theme.