Learn four techniques to organize, modularize, optimize, and document your CSS code for large HTML projects. Improve your code quality and maintainability.

Learn how to keep your HTML and CSS code up to digital publishing standards with validator tools, semantic markup, naming conventions, code optimization techniques, and testing tools.

Click the scroll-down arrow in the middle column and select "Add CSS." Enter your custom CSS code in the "Add Custom CSS" box. Click the "Apply to Blog" button located in the right corner of the page.