Test Responsive and Mobile Layouts

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Test how your app looks on different screen sizes and devices.

/shiplight verify http://localhost:3000 on mobile (390x844 viewport, touch enabled) —
check that the hamburger menu appears instead of the desktop navigation bar.

Available emulation options:

Option	Example	Description
viewport	390x844, 768x1024	Screen dimensions
is_mobile	—	Mobile CSS media queries, meta viewport
has_touch	—	Touch events
user_agent	Custom UA string	Override the browser user agent
color_scheme	dark, light	Emulated color scheme
locale	ja-JP, fr-FR	Browser locale
timezone_id	America/New_York	Emulated timezone
geolocation	lat/lng coordinates	Emulated GPS location

For the full browser_options reference, see Browser Options.