CSS architecture at scale: BEM vs. utility-first vs. CSS Modules

Comparing CSS methods

Modern frontend developers have multiple choices for styling: BEM (standard CSS/Sass structure), CSS Modules (scoped and modular native CSS), and Utility-First (Tailwind CSS).

Pros and cons

Utility-first offers lightning-fast styling speed and zero bloated stylesheets as your project grows. CSS Modules provide excellent separation of concerns. BEM is still useful for design systems that need generic distribution classes.

/* Scoped CSS Module example */
.cardContainer {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: transform 0.2s ease;
}
.cardContainer:hover {
  transform: translateY(-4px);
}