Create a design for a hoodie featuring the word "Cityville" in bold, modern typography at the top. Below it, include the word "Athletics" in a smaller, italicized font. Use a sleek, stylized silhouette of a bird instead of any brand-specific logo, placed to the left of the text. Change the color scheme to a gradient of teal and navy, and place thin horizontal lines above and below the text for emphasis. The background should be a solid dark color to make the text pop.