Design a car steering wheel that features a sleek, circular shape with a textured grip. The center hub should be minimalist, without any brand insignia, and incorporate a simple, geometric pattern. The buttons on the wheel should have a matte finish and include functionalities like volume control, source selection, and voice commands, arranged in an ergonomic layout. The wheel's outer edges should be slightly thicker for comfort, with a contrasting stitching color, such as bright red or green, enhancing its sporty appearance. Surrounding the wheel, replace the dashboard display with a modern, digital gauge cluster featuring customizable graphics and a cohesive color scheme that matches the stitching.