:root{--brand:#0f766e;--brand-dark:#115e59;--brand-light:#f0fdfa;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc;--card:#fff;--ok:#15803d;--warn:#b45309;--danger:#b91c1c;--shadow:0 2px 8px #0f172a0d, 0 10px 28px #0f172a0a;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box}html,body,#root{background:var(--bg);height:100%;color:var(--ink);-webkit-font-smoothing:antialiased;margin:0}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}input,select,textarea{font-family:inherit;font-size:14px}.pos-shell{flex-direction:column;height:100vh;display:flex;overflow:hidden}.topbar{background:var(--card);border-bottom:1px solid var(--line);flex-shrink:0;align-items:center;gap:16px;padding:10px 20px;display:flex;box-shadow:0 2px 10px 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