TitleField now uses var(--headings-h1-font-size/weight/line-height/letter-spacing) instead of hardcoded 28px, matching the editor H1 exactly. Added margin-left: 8px to align with BlockNote's bn-block-content offset. Fixed bn-editor max-width to use the same CSS var as the title-section for consistent horizontal alignment. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>