:root{color-scheme:light;--bg:#ffffff;--bg-soft:rgba(255,255,255,0.85);--panel:rgba(255,255,255,0.95);--panel-border:rgba(255,255,255,0.6);--text-primary:#1f2937;--text-muted:#5a6b7c;--text-soft:#8492a6;--accent:#0c7350;--accent-soft:rgba(12,115,80,0.1);--accent-red:#ef4444;--chip-bg:#ffffff;--chip-border:rgba(12,115,80,0.2);--sidebar-bg:rgba(255,255,255,0.7);--sidebar-border:rgba(255,255,255,0.4);--shadow-soft:0 10px 40px rgba(12,115,80,0.05);--user-msg-bg:#ffffff;--bot-msg-bg:#ffffff;--error-bg:#fef2f2;--error-border:#fecaca;--error-text:#991b1b;--error-accent:#dc2626;--radius-sm:6px;--radius-md:12px;--radius-lg:18px;--radius-pill:9999px}.dark{color-scheme:dark;--bg:#0f172a;--bg-soft:rgba(15,23,42,0.95);--panel:#1e293b;--panel-border:#334155;--text-primary:#f1f5f9;--text-muted:#94a3b8;--text-soft:#64748b;--accent:#22c55e;--accent-soft:rgba(34,197,94,0.15);--accent-red:#f87171;--chip-bg:#1e293b;--chip-border:rgba(34,197,94,0.3);--sidebar-bg:rgba(15,23,42,0.9);--sidebar-border:#334155;--shadow-soft:0 10px 40px rgba(0,0,0,0.3);--user-msg-bg:#1e293b;--bot-msg-bg:#1e293b;--error-bg:rgba(254,242,242,0.1);--error-border:#7f1d1d;--error-text:#fca5a5;--error-accent:#f87171}