spring-projects
Documentation: level 5 and 6 (h6) section titles are visually indistinguishable
The Spring Data JPA Reference Documentation uses a rich structures with a large and deep section tree. Many sections reach levels 5 and 6, with titles using HTML h5 and h6 elements.
While there is a difference between these last levels in the table of contents (level 6 sections are not displayed), the content alone does not let readers see a difference between the two. On my Firefox 92, both are computed as having a bold black font with 19.2 pixels size.
An example can be seen in section 5.1.1, which has a level-6 section Custom Namespace Attributes inside the level-5 section Spring Namespace:
One solution could be to make level-5 titles fully uppercase. Otherwise, numbering level 5 sections would workaround.
