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Viewport Configuration

Checks the viewport meta tag, device-width setting and initial scale for correct rendering on mobile devices.

Media Queries

Analyzes CSS responsive rules and breakpoints that adapt the layout to different screen sizes.

Tap Targets

Checks if buttons and links are large enough for comfortable touch interaction on mobile screens.

Font Sizes

Detects fonts that are too small for mobile reading. Readable text without zooming is a key usability factor.

Responsive Images

Checks the use of srcset, sizes and picture elements for serving optimally sized images to each device.

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