SMACSS stands for Scalable and Modular Architecture for CSS. It’s a CSS methodology that helps organize and structure stylesheets for better scalability, readability, and maintainability.
Using SMACSS prevents messy CSS, reduces code duplication, and makes it easier for multiple developers to work on large or growing projects without conflicts.
SMACSS focuses on categorizing styles (Base, Layout, Module, State, Theme).
BEM uses naming conventions (block__element–modifier).
OOCSS encourages reusable objects.
SMACSS is flexible and can be combined with BEM if needed.
SMACSS breaks styles into 5 categories:
Base – default elements (body, a, h1)
Layout – structural layout (header, footer, grid)
Module – reusable components (card, slider, nav)
State – temporary states (.is-active, .hidden)
Theme – visual variations or themes
es. For medium to large custom websites or web apps, we follow SMACSS or similar CSS architecture to ensure clean, scalable code — especially when working with Bootstrap, Tailwind, or raw CSS.