Custom Casual Black T-Shirt

I’m putting together a simple yet striking black T-shirt intended purely for casual wear. The cut will be a standard short-sleeve tee; what I still need is an eye-catching front (and possibly back) design that feels relaxed and everyday-friendly rather than corporate or event-oriented.

I’m open-minded about the creative direction—you might propose a bold graphic, a clean typographic concept, a small emblem over the chest, or a mix of these. What matters most is that the artwork stands out crisply against black fabric and looks great with jeans or joggers.

Please supply:
• A high-resolution, print-ready file (vector AI/SVG and layered PSD or equivalent)
• A mock-up on a black T-shirt template so I can visualise the final look

If you have sample portfolios of similar casual T-shirt work, feel free to share them when you respond.