4041950s Diner Script Logo

Generate exactly one finished original 1950s diner hand-lettered sign logo image. Output the image directly, no explanation. Canvas: Output size 1080x1080 pixels, 1:1 square post. Keep all text fully readable..
Shop name: "【Shop name】"
Business: "【Business】"
Colors: "【Colors】"
Print the shop name exactly once, preserving every character, case, space and punctuation in its original writing system. Never translate or romanize it. This exact name is the ONLY text in the image; do not print the business, labels, slogans, dates, prices or any other words. If the name is empty ask for it; if business is empty use a soda bar; if colors are empty use coral, deep teal and warm ivory.
Create custom 1950s brush-script sign lettering: confident thick downstrokes, delicate connecting upstrokes, open counters, a lively slanted baseline, restrained dimensional painted offset shadow and one elegant underline swash. For Hangul or Japanese preserve intact readable character structures rather than forcing Latin cursive. Make the lettering large and dominant, with a clean solid background extending to every edge. Keep the complete lettering and swash visible with comfortable breathing room; adapt to the chosen canvas without cropping. This is flat finished brand artwork, not a photographed sign or mockup. Use the business and palette to determine the mood and custom letter anatomy: a soda bar feels quick and buoyant, a bakery soft and graceful, a barbershop crisp and bold. Add at most two small geometric sparkle accents; no objects, food, mascots or illustrated scenes. Avoid neon tubes, chrome, rounded 1970s bubble lettering, distressed texture, badge borders and generic font typesetting. Never imitate an existing brand, logo, artist or signature. All design elements must be original. Before returning, compare the rendered name character by character against the input and correct omissions, substitutions and duplicates.

[Final output format]
Output size 1080x1080 pixels, 1:1 square post. Keep all text fully readable.
This selected output format takes priority over any fixed canvas size or aspect ratio elsewhere in this template. Adapt the composition, text zones and margins to the selected canvas without stretching or cropping essential content. Device safe areas apply only when a device is selected. Never print these format instructions on the image.