:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;color:#20252b;background:#f5f6f8;line-height:1.5;--surface:#fff;--panel:#fbfbfc;--line:#e0e4e9;--muted:#89939d}html,body{min-height:100%;margin:0;background:var(--page,#f5f6f8);color:var(--text,#20252b)}body{min-height:100vh}*:not(dialog){box-sizing:border-box}[data-theme=dark]{--page:#171b21;--text:#edf1f5;--surface:#222831;--panel:#1d232b;--line:#3a434e;--muted:#aab4bf}body{transition:background .15s,color .15s}.app-shell{min-height:100vh;max-width:1180px;margin:auto;padding:34px 28px 52px}.topbar,.panel-heading,.editor-heading,.editor-footer{display:flex;align-items:center;justify-content:space-between;gap:18px}.topbar{margin-bottom:26px}.top-actions{display:flex;align-items:center;gap:10px}.eyebrow{margin:0;color:var(--muted);font-size:11px;font-weight:800;letter-spacing:.14em}.topbar h1{margin:2px 0 0;font-size:31px;letter-spacing:-.04em}.workspace{display:grid;grid-template-columns:340px 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