Dark product UI where light behaves like atmosphere: huge soft radial glows in violet and cyan breathe behind floating cards on a near-black field. The house style of AI startups and modern dev tools — Linear and Vercel's landing pages taken to their ambient conclusion.
Primary actionThe ambient halo: a 400–800px radial gradient of violet at ~15% opacity positioned behind the hero or a featured card, so the UI appears lit by an off-screen light source rather than decorated.