Writing effective CSS for WordPress

WordPress is undoubtedly a great content management platform and for the many use cases it covers it brings a lot of developer benefits on the table. Among the benefits, however, there are a handful of thorns sticking out and one of the sharpest ones is arguably CSS authoring which unfortunately can’t be blunted by the core team because it’s not inherently a fault within WordPress itself. After authoring more than a hundred massively used themes and a number of fairly popular plugins, the struggles of writing CSS for WordPress are constantly evident. This piece will attempt to identify specific problems we face as design engineers, bad practices and code smells to look out for (some of which myself very guilty of), and some thoughts and patterns on how we can improve the landscape as a community.
CSS is nuts
While CSS looks simple and fairly straightforward, anyone who embarks on authoring styles for a medium to large product with a handful of intertwined components will quickly realize that it’s a rather complicated beast to tame. One piece of evidence supporting the previous claim is merely the large amount of proposed patterns and methodologies on how to organize
Source: https://managewp.org/articles/15688/writing-effective-css-for-wordpress

source https://williechiu40.wordpress.com/2017/07/19/writing-effective-css-for-wordpress/