:root{--primary:#6366f1;--primary-hover:#4f46e5;--primary-light:#e0e7ff;--secondary:#8b5cf6;--accent:#06b6d4;--gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-300:#d1d5db;--gray-400:#9ca3af;--gray-500:#6b7280;--gray-600:#4b5563;--gray-700:#374151;--gray-800:#1f2937;--gray-900:#111827;--success:#10b981;--warning:#f59e0b;--error:#ef4444;--info:#3b82f6;--user-bubble-bg:var(--primary);--user-bubble-text:#ffffff;--assistant-bubble-bg:var(--gray-100);--assistant-bubble-text:var(--gray-900);--sidebar-width:320px;--sidebar-bg:var(--gray-50);--header-height:56px;--font-sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--font-mono:'JetBrains Mono','Fira Code','Consolas',monospace;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--shadow-sm:0 1px 2px rgba(0,0,0,0.05);--shadow-md:0 4px 12px rgba(0,0,0,0.08);--shadow-lg:0 8px 24px rgba(0,0,0,0.12)}
[data-theme="dark"]{--gray-50:#0f172a;--gray-100:#1e293b;--gray-200:#334155;--gray-300:#475569;--gray-400:#64748b;--gray-500:#94a3b8;--gray-600:#cbd5e1;--gray-700:#e2e8f0;--gray-800:#f1f5f9;--gray-900:#f8fafc;--primary-light:#312e81;--assistant-bubble-bg:#1e293b;--assistant-bubble-text:#e2e8f0;--sidebar-bg:#0f172a}
[data-font="small"]{font-size:13px}
[data-font="medium"]{font-size:15px}
[data-font="large"]{font-size:17px}