:root{--primary:#4F8CFF;--primary-dark:#2563EB;--bg:#F0F2F5;--surface:#FFFFFF;--text:#1E293B;--text-secondary:#64748B;--border:#E2E8F0;--danger:#EF4444;--success:#10B981;--msg-mine:#4F8CFF;--msg-other:#FFFFFF;--chat-bg:#e5ddd5;--radius:14px;--shadow:0 2px 10px rgba(0,0,0,0.06);--shadow-lg:0 10px 40px rgba(0,0,0,0.12);--font:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif}
[data-theme="dark"]{--bg:#1a1a2e;--surface:#16213e;--text:#e0e0e0;--text-secondary:#a0a0a0;--border:#333;--msg-other:#2d3436;--chat-bg:#0f3460}

[data-theme="dark"] {
    --bg: #0f0f1a;
    --surface: #1a1a2e;
    --text: #e0e0e0;
    --text-secondary: #888;
    --border: #2a2a3e;
}

--primary-light: rgba(79,140,255,0.1);