responsiveness▌

Build responsive, mobile-first web applications.

Test website responsiveness across viewport widths, detect layout transitions, and report where layouts break. \n \n Supports three operating modes: Standard Check (8 key breakpoints), Sweep (15 widths at 160px increments), and Targeted Range (user-specified widths at 80px increments) \n Runs 8 layout checks per viewport covering horizontal overflow, text overflow, navigation transitions, content stacking, image scaling, touch targets, whitespace balance, and CTA visibility \n Detects and report