Onda.

Build a fullscreen interactive hero for Onda, a sculptural speaker concept for listeners who care about sound and object design. Use an aubergine ground #2b1230, deeper shade #160818, warm light text #f6eef2, fine pink lines #e8a3b8 and coral #ff5a3c actions. Pair compressed Big Shoulders Display with Figtree. The Room profile is the initial palette; Stage and Night introduce coordinated alternate ground and accent colours. Place ONDA at the upper left, three small profile choices Room, Stage and Night at the top centre, and Menu at the upper right. Run the large uppercase headline Hear the whole room vertically along the left edge. Place short editorial copy and a Reserve yours action near the lower left, followed by a labelled filter cutoff slider and a small sound status line. Stand a tall sculptural speaker near the bottom right. Draw a curved dark shell, a subtle light slit, a circular driver and a play control centred on the driver. Fill the viewport with thin concentric irregular rings radiating from that same point. The rings should feel like sound made visible, with restrained seeded drift while idle and pointer ripples across the field. Audio starts only through an explicit press of the speaker control. Give playback a steady synthesised sound loop. Couple the ring response to the sound. Dragging across the field or moving the cutoff slider changes a lowpass filter and its visible readout. Profile selection retints the composition. The menu fans out radially from the driver rather than becoming a standard navigation bar. Below 760px recompose the speaker, headline and controls into a readable phone frame. Keep touch gestures usable and avoid accidental audio playback. Provide a static ring composition as the fallback and keep audio optional.