:root{--font-family:system-ui,-apple-system,"Segoe UI",sans-serif;--font-size-sm:0.875rem;--font-size-base:1rem;--font-size-lg:1.25rem;--font-size-xl:1.75rem;--font-size-2xl:2.5rem;--font-size-3xl:3.5rem;--color-primary:#2563eb;--color-primary-contrast:#fff;--color-background:#0f172a;--color-surface:#fff;--color-text:#0f172a;--color-text-muted:#64748b;--space-sm:0.75rem;--space-md:1.5rem;--space-lg:2.5rem;--space-xl:4rem}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:var(--font-family);color:var(--color-text);background:var(--color-background)}a{color:inherit}