*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--color-bg:#f9fafb;--color-surface:#fff;--color-border:#e5e7eb;--color-text:#111827;--color-muted:#6b7280;--color-primary:#4f46e5;--color-primary-hover:#4338ca;--color-danger:#ef4444;--font:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}body{font-family:var(--font);background:var(--color-bg);color:var(--color-text);line-height:1.5}