Final Check

1. Where to Put Breakpoints?

Don't orient on devices (iPhone 15, Galaxy S23). Orient on content. Slowly narrow browser window in inspectors. Where layout " breaks " (text overflows, grid too tight) — put breakpoint.

2. Chrome DevTools

Go to emulation mode (Cmd+Shift+M), select " Responsive " and pull the edge.

Caution

Emulator is not a real device. It doesn't account for iPhone screen " notch " , mobile keyboard, and touch-sensor features. Always check final result on live phone.

Remember: Good site is one that's convenient to use with one thumb on the go in subway.