:root{--bg:#ffffff;--bg-secondary:#f9fafb;--border:#e5e7eb;--text:#111111;--text-secondary:#6b7280;--accent:#16a34a;--accent-hover:#15803d;--up:#16a34a;--down:#dc2626;--card-bg:#ffffff;--nav-bg:rgba(255,255,255,0.9)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0f0f0f;--bg-secondary:#1a1a1a;--border:#2a2a2a;--text:#f5f5f5;--text-secondary:#9ca3af;--accent:#22c55e;--accent-hover:#16a34a;--card-bg:#1a1a1a;--nav-bg:rgba(15,15,15,0.9)}}:root[data-theme=dark]{--bg:#0f0f0f;--bg-secondary:#1a1a1a;--border:#2a2a2a;--text:#f5f5f5;--text-secondary:#9ca3af;--accent:#22c55e;--accent-hover:#16a34a;--card-bg:#1a1a1a;--nav-bg:rgba(15,15,15,0.9)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6;transition:background .2s,color 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