Summary
• Media queries let you apply conditional styles based on different device properties.
• Responsive web page designs let you create one source of content and use style sheets and media queries to adapt the page design to different devices.
• Design for the needs of the content, not the device.
• Remove or add content as necessary to provide the best experience for the user.
• Use the fewest breakpoints possible, and determine the breakpoints by examining how the content behaves at different browser widths.