SASS gives you power; architecture is what stops you abusing it. A deep-dive on structuring stylesheets so they scale — design tokens, the 7-1 folder pattern, BEM, managing specificity, and thinking in components instead of pages.
Two tools we reach for on every Rails project. How HAML makes templates readable and SASS keeps stylesheets maintainable — with the patterns that work and the traps (over-nesting, @extend) that don't.