Responsive navigation checks across seven viewport widths

What was measured

Reproduced a tablet navigation overlap, repaired the breakpoint, then ran the same navigation acceptance across seven explicit browser viewport widths.

Instrument: Chromium viewport geometry, keyboard checks and rendered screenshots

Recorded findings

1. A 768-pixel-wide browser view exposed overlapping navigation on the tested website before its navigation breakpoint was repaired.

   n=1; 2026-10-03 to 2026-10-03; method: Inspected the rendered tablet view and retained a screenshot showing the header overlap before the repair.; recorded value: 768 CSS pixels of viewport width

2. After that repair, navigation geometry and keyboard checks passed at 320, 390, 768, 1023, 1024, 1280 and 1440 CSS pixels in Chromium.

   n=7; 2026-10-03 to 2026-10-03; method: Ran the bounded Chromium navigation checks at each listed width and visually inspected the phone, tablet and desktop layouts; retained test output and screenshots.; recorded value: 7 tested viewport widths

Limits and privacy

• One website and one browser engine; viewport emulation does not represent seven physical devices.
• The checks cover the tested navigation and layout, not a complete accessibility certification.
• Passing these widths does not establish correctness at every possible width or zoom level.

Anonymisation: The record contains only viewport sizes, outcomes and method. Screenshots, private machine details and account identifiers are not included.

This record is primary evidence from Hallermann Consulting. Its findings should not be extrapolated beyond the stated sample, period and method.