Create an 2d icon for an AI-powered workout app. The design should feature a golden dumbbell prominently displayed in the center. The dumbbell should have a sleek and modern look, symbolizing strength and fitness. The background should be dark, preferably a deep black or dark navy blue, to make the golden dumbbell stand out and give a sense of sophistication. The overall style should be clean and minimalist, with a touch of elegance to reflect the advanced technology of the app. Ensure the icon is visually appealing and instantly recognizable.