:root{--color-bg:#ffffff;--color-surface:#f6f7f9;--color-text:#111827;--color-muted:#6b7280;--color-primary:#2563eb;--color-primary-text:#ffffff;--color-border:#e5e7eb;--space-1:4px;--space-2:8px;--space-3:16px;--space-4:24px;--font-sans:system-ui,-apple-system,"Segoe UI",sans-serif;--font-size-sm:0.875rem;--font-size-md:1rem;--font-size-lg:1.25rem}