Create a minimalist t-shirt design inspired by Dhaka city’s iconic skyline. The central graphic should depict line art of buildings, bridges, and rickshaws, rendered in black for clarity and contrast. Incorporate subtle pastel gradients of green and yellow within the line art to add depth while maintaining a clean, flat aesthetic. Below the illustration, place the text “Urban Dhaka” in a clean sans-serif font, ensuring it complements the minimalist style. The overall design should evoke a modern urban vibe, reflecting the essence of Dhaka. In post-production, ensure the pastel gradients are smooth and well-blended, enhancing the visual appeal without overwhelming the design. The background must remain transparent for easy application on various t-shirt colors.