Owner's three rendering refinements (plan-graph round, 2026-09-26):
1. Reading font: the diagram root sets font-family var(--font-prose) —
node titles render in the reading font instead of the inherited mono
UI font. Deliberately NOT the font-prose utility: @theme inline bakes
the literal into utilities (the --font-title trap), which would freeze
the graph at Source Sans 3 and ignore the Appearance reading-font
override. The runtime var rides it (live-verified: Georgia override
propagates, null resets to Source Sans 3).
2. Thinner lines: edges + box outlines 1.5 → 1 (the app's standard border
weight). The arrowheads scale by the same 2/3 (HEAD_H 16 → 10.67; the
width, the notch overhang, and the DOCK_GAP all derive from the head
scale), so the head:shaft LaTeX proportion is preserved exactly.
3. Arrow color: white only when BOTH ends are white — an edge with an
upcoming origin OR upcoming terminal stays gray (line + head).
Supersedes round 6's target-only rule: arrows leaving a gray box no
longer paint white into covered territory.
Live-verified on :3001 (native-format fixture: plan_init + answered
quizzes; popup): font default + override, stroke-width 1 on all rects and
edges, 5-edge graph with exactly one both-white edge white and both
upcoming→visited cross edges gray.
amosblomqvist
dcb839232c