3D Glowing Heartbeat App Icon

A clean 3D app-icon hero graphic centered on a wide canvas. A single floating rounded-square icon with glossy beveled edges in [electric violet blue], featuring a subtle translucent rim, soft inner highlights, and four tiny circular screw-like accent dots near the rounded corners. Centered on the icon face is a raised, thick, smooth glowing white heartbeat waveform symbol casting a soft shadow onto the surface. The icon hovers above the background with a gentle purple ambient glow and drop shadow. Dark cinematic abstract background fading from near-black at the top into deep purple and magenta, accented by blurred neon blue-violet waves along the bottom edge and a faint central haze. Futuristic, minimal, and polished studio lighting. Centered composition with generous negative space, no text, no people, no additional objects.