10
Responsive Design Fundamentals: Mobile-First & Media Queries
Day 10 of 30
Learning Objectives
By the end of this chapter, you will be able to:
- Explain what responsive design is and why it matters
- Understand the mobilefirst design philosophy
- Use media queries to adapt layouts across screen sizes
- Decide when a media query is needed (and when it isn’t)
- Combine Flexbox and media queries effectively
- Avoid common responsive design mistakes
- Use AI prompts to reason about layout decisions across devices
Vibe Learning Mindset (Chapter Focus)
“Design for constraints first — then enhance.”
Responsive design isn’t about guessing device sizes.
It’s about designing for limited space, then expanding gracefully.
What You’re Building Today
You’ll ...