#sg-layouts.showcase.shadow-1 header.showcase-header h2 Basic Layouts p. You will use the following layouts throughout your documenation to specify sections and sub-sections of content. .showcase-content .l-main-section h2 Main Section Title p Main section content... code-example(language="html" format="linenums"). .l-main-section h2 Section Title p section content... .l-sub-section h3 Sub Section Title p. sub section content... This content is related to the main section content and falls within the main section. code-example(language="html" format="linenums"). .l-sub-section h3 Sub Section Title p sub section content...