Responsive HTML/CSS repair — Fictional demonstration

Fictional HTML/CSS demonstration, not previous client work. A fixed-width panel causes horizontal overflow in the original page. The corrected page fits at 390, 768 and 1440 px in Chrome: measured document width matches each viewport. The change replaces a fixed 960 px width with width: min(960px, 100%). Keyboard focus remains visible and link targets are checked. Deliverables include before/after HTML, mobile screenshots and a verification report. AI-assisted development with actual browser checks.