Retro Collegiate Grandma T-Shirt Design

1080x1080 square T-shirt graphic, solid #D3D3D3 background, single warm-white ink color, retro collegiate sports aesthetic. Create a centered badge-like typography composition without an enclosing border. Place “NOT JUST A” in small uppercase condensed lettering at the top, “GRANDMA” extremely large in bold varsity block type, “A CATCHER'S” in smaller lettering beneath it, and “BIGGEST FAN” as another strong oversized line, finishing with “CLUB OF ONE” in narrow uppercase lettering. Include a simple thin catcher mask outline subtly arching over the top of the design. Slightly distressed screen-print texture, thick legible forms, compact vertical arrangement, no realistic illustration, baseballs, bats, gradients, shadows, or extra wording.