Cap content at 768-960px via PageShell width tiers, add muted outer margins, and limit gua grid to four columns.
Co-authored-by: Cursor <cursoragent@cursor.com>
Learn uses 64-gua card grid; liuyao/bazi/combined use two input cards plus sticky right AI panel; add manifest, service worker, and install prompt.
Co-authored-by: Cursor <cursoragent@cursor.com>