Mobile traffic overtook desktop years ago. Designing mobile-first is no longer a nice-to-have — it's the baseline expectation for every new site.
Principles that still matter
- Start with the smallest screen and progressively enhance
- Treat touch targets as a minimum 44x44 px
- Keep critical content above the fold without sacrificing rhythm
- Test on real devices, not just the browser emulator
Performance is part of design. A beautiful layout that takes eight seconds to paint on 4G is a broken layout.