Responsive design means website adjusts to screen size.
      
      ## Real world example
      Same website:
      - looks good on phone
      - works on laptop
      - readable on tablet
      
      ## Viewport meta tag
      ```html
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      ```
      
      ## Without viewport
      Mobile shows zoomed-out website.
      
      ## With viewport
      Website fits mobile screen correctly.

Make websites work on mobile, tablet, and desktop.

HTML Responsive

Learn HTML fundamentals for building web pages: semantic structure, forms, accessibility, and best practices.

HTML Responsive

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