Menus

Sphinx derives navigation from the doc tree (toctree directives) — there’s no separately configured menu structure. This port instead uses two independent Hugo menus:

• site.Menus.main — top navbar links (rendered by navbar-nav.html), with automatic overflow into a “More” dropdown past header_links_before_dropdown entries (see Header links ).
• site.Menus.sidebar — the left sidebar nav tree (rendered by sidebar-nav.html, see Sidebar navigation ), falling back to site.Menus.main if you don’t define one.

Because they’re independent, your top nav and sidebar nav don’t have to mirror each other — a common pattern (used by this docs site itself) is a short main menu (just “Docs” + “GitHub”) alongside a much deeper sidebar menu for in-page navigation.

Both are just standard Hugo menus ([[menus.main]] / [[menus.sidebar]] in hugo.toml, or menu: frontmatter on content pages) — nothing theme-specific about how you populate them, only in how the theme chooses to render them.