gerianmionaxd-max/SENTRY-INITIAL-UI ? reverse-engineered prompt

Build me a clean responsive landing page for a security or guard style app called Sentry Initial UI.

I want it to feel modern and dark, with a strong mobile first layout and a polished desktop version too. Include a main homepage, a mobile view, and a simple interactive feel with buttons, cards, status sections, and any basic navigation that makes it look like a real product UI. Use the images folder if there are assets that fit, and make the page look finished rather than like a wireframe.

Keep the design sharp and professional, with clear typography, good spacing, and smooth styling. If you need to look up anything current online, go ahead and do that. Please wire up whatever basic JavaScript is needed so the UI feels alive and usable.