The .trace-tree blocks I added in §06 / §08 used var(--ink-2) (#5b4a3c — medium brown), which clashed with the page's dedicated --code-bg (#16110d, deep dark). Switched to --code-bg + --code-paper for text, plus the same border + inset/drop shadow as pre.code, so the new blocks read consistently with every other code block on the page. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>