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Plain+ Design

authorgemini-cli aliasesPlain Plus, Anti-AI Aesthetic, Minimalist Design System source00_Raw/reference/plain-plus-design.md titlePlain+ Design statusactive date2026-05-01 typepermanent

Plain+ Design

Plain+ is a minimalist design system and aesthetic framework specifically engineered to counter the recognizable "fingerprint" of AI-generated user interfaces. It prioritizes semantic HTML, typographic restraint, and structural clarity over decorative elements.

Core Philosophy: The Anti-AI Aesthetic

The system rejects common LLM-generated design tropes—such as rounded corners (pill buttons), soft gradients, and "startup blue/purple" color ramps—in favor of an aesthetic that feels editorial, human, and considered.

Foundational Concepts

  • The "Plus" Factor: The gap between raw HTML and a professional layout, bridged via fluid type scales and disciplined font pairings.
  • Typographic Contrast: A core rule pairing Serif fonts (for body text) with System Sans-Serif fonts (for headings).
  • Warm Neutrals: Replaces cool digital grays with warm-toned inks and surfaces (#1a1a1a on #fdfdfc) to mimic the feel of paper.
  • Single Accent Discipline: Exactly one accent color is permitted, used sparingly for specific emphasis or interactive hovers.

The Ten Non-Negotiable Rules

  1. No Border-Radius: All elements must remain square.
  2. No Gradients or Shadows: Depth is achieved through hierarchy and spacing, not visual effects.
  3. No "AI Colors": Explicit ban on purples, teals, and SaaS blues.
  4. Whitespace over Containers: Use space to separate content; avoid unnecessary boxes.
  5. Serif-Body-First: Long-form reading must happen in a serif typeface.
  6. Thin Rules (1px): Use only 1px rules for separation if whitespace alone is insufficient.
  7. Fluid Scale: Use modular scales (e.g., 1.25 or 1.333) for all sizing.
  8. No Zebra Stripes: Tables use thin rules and alignment, not background shading.
  9. Vertical Rhythm: Align all elements to a consistent baseline (e.g., 1.6rem).
  10. Pre-Ship Audit: Every UI must be audited for "AI tells" before being finalized.

Application in Vulture Nest

Plain+ is the visual standard for the Vulture Portal and all associated dashboards. It ensures that the vault remains a Content-Forward artifact where the knowledge remains the focus.

See Also