:root{--bg:#f5f6f8;--panel:#fff;--border:#e3e6ea;--text:#1f2329;--muted:#6b7280;--primary:#2563eb;--primary-dark:#1d4ed8;--danger:#dc2626;--accent:#fff7e6}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{color:var(--text);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:14px}.muted{color:var(--muted)}.small{font-size:12px}.pad{padding:16px}.center{place-items:center;height:100%;display:grid}.btn{border:1px solid var(--border);background:var(--panel);color:var(--text);cursor:pointer;border-radius:6px;padding:8px 14px;font-size:13px}.btn:hover{background:#f0f2f5}.btn.primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn.primary:hover{background:var(--primary-dark)}.btn.danger{color:var(--danger);border-color:#f3c2c2}.btn.link{color:var(--primary);background:0 0;border:none;padding:4px 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