:root{--color-bg:#fff;--color-surface:#f8f9fa;--color-brand:#1a1a2e;--color-accent:#4a6fa5;--color-text:#111827;--color-text-muted:#6b7280;--font-sans:system-ui, -apple-system, sans-serif;--font-mono:"JetBrains Mono", monospace;--radius-sm:4px;--radius-md:8px}