### Problem to solve Via [this design pattern issue](https://gitlab.com/gitlab-org/design.gitlab.com/issues/47) we explored how to consolidate our page widths (`990px`, `1280px`, `full-width`). The overall goal is to simplify and move most pages to a width of `990px`. In addition, we are tackling a second iteration https://gitlab.com/gitlab-org/design.gitlab.com/issues/103 to identify if we can get right of the larger width `1280px` completely by moving these to either the smaller width or full width. ### Proposal This issue serves as the corresponding implementation part. I expect that related changes will be split into several MRs and potentially be implemented across a few milestones. Scope: All sub-pages of "Repository" ### What does success look like, and how can we measure that? We reduced the available range of page widths to simplify FE environment, reduce complexity and improve readability in the UI.