flowchart TB
  subgraph principal["Main context: user, worker_processes, pid"]
    subgraph ev["events"]
      evd["worker_connections"]
    end
    subgraph ht["http: all the web traffic"]
      hd["log_format, include mime.types, gzip"]
      subgraph sv["server: one site, chosen by listen and server_name"]
        sd["root, ssl_certificate, error_page"]
        subgraph lo["location: one URL path"]
          ld["try_files, proxy_pass, return"]:::accent
        end
      end
    end
  end