Underscores is a starter theme designed for developers and designers who want to create custom themes from scratch. It serves as a minimal, well-structured codebase that avoids bloated features, allowing users to focus on building unique designs without unnecessary constraints.

• Lean HTML5 templates: Offers just the right amount of modern, commented code to serve as a solid starting point, reducing clutter and simplifying customization.
• Organized starter CSS: Provides smartly structured CSS in style.css that helps you quickly implement your design ideas without wrestling with complex defaults.
• Custom template tags: Includes functions in template-tags.php that keep templates clean and prevent code duplication, promoting maintainable and efficient theming.
• Responsive navigation: Features a script at js/navigation.js that makes menus toggle on small screens, ready for styling and ensuring mobile-friendly layouts.
• Sample layouts and tools: Comes with optional elements like a 404 template, sample custom header implementation, and two CSS layouts for sidebars, giving flexibility in design choices.