Create a square t-shirt graphic design with the following concept:

Title: Neon Grave Mecha
Slogan: Decode the Sinister Core
Visual style: Y2K vaporwave chalk sketch with nordic frost palette and a laser grid underlayer
Mood: sinister underground low-energy mystery
Core concept prompt: A vertically stacked chalk sketch of a mechanical skull infused with cyber terminal typography accents, rendered with vaporwave and Y2K aesthetics. The design features nordic frost blues and icy purples, layered with laser grids and subtle 3D depth scanlines, creating an eerie and low-energy underground vibe.
Typography density rule: Use at most one tiny, simple brand-like mark or short label only if essential; the graphic must remain primarily visual.

Hard constraints:
- Keep composition centered and shirt-print friendly.
- Use high-contrast, clear forms suitable for print.
- Any text must be large and easily readable.
- Exclude all forbidden elements: real brands, celebrities, explicit content, political slogans, tiny unreadable text
- Do not include real brand names/logos, celebrity likenesses, copyrighted characters, political campaign slogans, hateful content, or explicit content.

Output a clean standalone design graphic, no mockup, no watermark, no background scene.

Create a square t-shirt graphic design with the following concept:

Title: Neon Grave Mecha
Slogan: Decode the Sinister Core
Visual style: Y2K vaporwave chalk sketch with nordic frost palette and a laser grid underlayer
Mood: sinister underground low-energy mystery
Core concept prompt: A vertically stacked chalk sketch of a mechanical skull infused with cyber terminal typography accents, rendered with vaporwave and Y2K aesthetics. The design features nordic frost blues and icy purples, layered with laser grids and subtle 3D depth scanlines, creating an eerie and low-energy underground vibe.
Typography density rule: Use at most one tiny, simple brand-like mark or short label only if essential; the graphic must remain primarily visual.

Hard constraints:
- Keep composition centered and shirt-print friendly.
- Use high-contrast, clear forms suitable for print.
- Any text must be large and easily readable.
- Exclude all forbidden elements: real brands, celebrities, explicit content, political slogans, tiny unreadable text
- Do not include real brand names/logos, celebrity likenesses, copyrighted characters, political campaign slogans, hateful content, or explicit content.

Output a clean standalone design graphic, no mockup, no watermark, no background scene.