Don't use a multi-column layout — screenshot shows a single centered column.
Don't use vibrant background colors — screenshot shows solid white.
Don't include a site header or navigation — screenshot shows only the error block.
Don't use shadow or elevation on the error block — screenshot shows flat text.
Don't use a custom sans-serif font — screenshot uses system defaults.
Don't use a complex grid system — screenshot uses simple margins.
Avoid: Technical jargon
Avoid: Friendly banter
11
System prompt
This is a sparse, default system error page. It features a simple single-column layout centered on a solid white background. Typography is basic system defaults in dark gray (#333333) and muted gray (#999999). There are no custom UI components, no brand colors, and no motion. Critical donts: avoid multi-column layouts, avoid colored backgrounds, avoid custom typography, avoid elevation/shadows, avoid site navigation, and avoid friendly or informal tone.
Bring this taste to your agent
Hand your AI agent a machine-readable spec of this design — tokens, type, motion, the whole DNA.
