:root{color-scheme:light;--bg:#f4f6f9;--panel:#ffffff;--surface:#f7f8fa;--surface-2:#eef1f5;--ink:#1b2733;--muted:#5f6b7a;--brand:#2b7de9;--brand-ink:#ffffff;--user:#2b7de9;--assistant:#eef1f5;--line:#e4e8ee;--danger:#b3261e;--overlay:rgba(0,0,0,0.4);--ok-bg:#e9f6ee;--ok-line:#bfe4cd;--ok-ink:#1f6b41;--err-bg:#fdeceb;--err-line:#f3c4c0;--sys-bg:#fff4f4;--sidebar-bg:#1c2733;--sidebar-ink:#e7edf5;--sidebar-muted:#93a1b3;--sidebar-hover:rgba(255,255,255,0.06);--sidebar-active:#2b7de9;--sidebar-active-ink:#ffffff;--sidebar-line:rgba(255,255,255,0.08)}[data-theme=dark]{color-scheme:dark;--bg:#0f1520;--panel:#161d2a;--surface:#1b2433;--surface-2:#202b3c;--ink:#e6ebf2;--muted:#9aa7b8;--brand:#4a9bff;--brand-ink:#ffffff;--user:#3f7dc9;--assistant:#232e40;--line:#2b3648;--danger:#f0857e;--overlay:rgba(0,0,0,0.6);--ok-bg:#16311f;--ok-line:#2c5a3b;--ok-ink:#7fce9c;--err-bg:#3a1d1c;--err-line:#6b322e;--sys-bg:#2e1f1f}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,Segoe 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