Icons and illustrations

Icon style

• Grid: 24 × 24 px, 1.75 px monoline stroke (2 px at 24 px is acceptable for theme-bundled icons), round caps and joins — matching the Tracemark's construction.
• Geometry: straight segments and circular arcs only; the provenance motifs (segmented span, gate ring, solid stroke) are preferred metaphors.
• Fill: icons are stroked, not filled; the only fills are status dots and the gate core.
• Source: documentation uses the theme's locally bundled icon set (Material Design Icons) — no icon CDN, no third-party requests. Custom icons are generated SVG in this style under docs/assets/.
• Sizing: 16/20/24 px UI sizes; below 16 px use the symbol tile instead of redrawing the mark.

Every icon that carries meaning gets an accessible name; decorative icons are hidden from assistive technology (accessibility).

Illustration style

Illustrations explain mechanics — they are diagrams with atmosphere, not decoration:

• Monoline scenes built from the pipeline vocabulary: a document spine, segmented spans traveling toward a gate, a solid verified stroke leaving it.
• One accent color per scene (Trace), structure in Ink/neutrals, surfaces from the scheme palette; no gradients inside strokes, no shadows inside illustrations.
• No mascots, no robots-with-faces, no stock art, no screenshots-of-code as illustration.
• Scenes render from generators where practical (same discipline as brand assets) so light/dark variants stay in sync.