*{box-sizing:border-box;margin:0;padding:0}:root{--primary: #2563eb;--primary-hover: #1d4ed8;--danger: #dc2626;--danger-hover: #b91c1c;--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #0f172a;--text-muted: #64748b;--radius: 8px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}.topbar{display:flex;align-items:center;padding:0 24px;height:56px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;gap:12px}.brand{font-weight:600;font-size:16px;flex:1}.topbar-right{display:flex;align-items:center;gap:12px}.user-label{color:var(--text-muted)}.btn-primary{background:var(--primary);color:#fff;border:none;padding:8px 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