A vibrant 80s retro t-shirt design featuring a synthwave chicken donning sleek sunglasses, standing confidently against a minimalist neon-hued sunset. The chicken's feathers shimmer with iridescent pastel colors, reflecting the glow of the sun. The background is a deep, cosmic midnight blue, speckled with subtle stars. The contour lines around the chicken and sunset add a dynamic sense of motion, with geometric shapes like triangles and grids subtly integrated into the design, enhancing its nostalgic futuristic vibe.