Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS- and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.

• Responsive grid system - Adapts to different screen sizes
• Prebuilt components - Includes buttons, forms, and navigation
• Powerful plugins - Built on jQuery
• Sass variables - Easier customization

• grid system - Adapts to
• Prebuilt - Includes
• Powerful - Built on jQuery
• Sass - Easier