What is a Design System and Why Does It Matter?
A design system is a single source of truth for your product's visual language — a structured collection of reusable components, style guidelines, and design tokens that ensure every part of your UI looks and behaves consistently. Without one, even small teams end up with mismatched font sizes, inconsistent button colors, and subtle visual debt that accumulates over time.
Modern design systems go beyond styleguides. They define semantic tokens like "bg-surface", "text-muted", and "border-strong" so that the intent of a color is clear, not just its hex value. This semantic layer makes dark mode effortless, theme switching instant, and onboarding new developers dramatically faster.