:root{--bg:#fff;--sidebar:#f8fafc;--center:#fff;--surface:#f1f5f9;--muted-surface:#e2e8f0;--panel-surface:#f8fafc;--user-bubble:#e2e8f0;--glass:rgba(0,0,0,.03);--glass-border:rgba(0,0,0,.08);--glass-border-focus:rgba(0,0,0,.14);--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#64748b;--accent:#0f172a;--accent-muted:rgba(15,23,42,.06);--accent-glow:rgba(15,23,42,.04);--selection-bg:rgba(15,23,42,.22);--selection-text:#0f172a;--radius-sm:8px;--radius-md:14px;--radius-lg:24px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:48px;--ease:cubic-bezier(0.22,1,0.36,1);--dur-micro:120ms;--dur-default:180ms;--dur-long:360ms}.dark{--bg:#0a0a0a;--sidebar:#111;--center:#141414;--surface:#1a1a1a;--muted-surface:#1e1e1e;--panel-surface:#111;--user-bubble:#2a2a2a;--glass:hsla(0,0%,100%,.03);--glass-border:hsla(0,0%,100%,.08);--glass-border-focus:hsla(0,0%,100%,.14);--text-primary:#e8e8e8;--text-secondary:#a0a0a0;--text-muted:#555;--accent:#e8e8e8;--accent-muted:hsla(0,0%,100%,.06);--accent-glow:hsla(0,0%,100%,.04);--selection-bg:hsla(0,0%,91%,.28);--selection-text:#fff}