Fathom is a concept marketing site for a fictional product that turns tide gauges and buoy readings into one timeline for sailors. I built it to show how an interactive demo can sit in a landing page’s hero. Visitors pick a harbour, enter their boat’s draught, and drag through the day to see when their keel clears the harbour bar. The site also has a feature section, a pricing section with a monthly/yearly toggle, an FAQ, and an early-access form. The design uses a sea-chart palette and type pairing. The interface is responsive and keyboard accessible, and it respects reduced-motion settings.