Hide the session nav signed in too, not only signed out

:has(a[href^="/auth/login"]) only ever matched the signed-out nav, so
an owner still had a name and a sign-out beside the wordmark. The
header carries the wordmark and nothing else now.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015GeH3y8fwTaTudaD88P57o

custom.css

@@ -1,15 +1,13 @@
 /* uhhm - the skin over portal's own stylesheet
    (site.yaml `stylesheet`, loaded after main.css, so these rules win). */
 
-/* The way in sits beside the wordmark on every page. uhhm.no is read
-   and answered without an account, so the invitation is not shown.
-   Whoever edits the site still signs in at /auth/login directly, and
-   once signed in the nav keeps its name and its way out. */
-.session:has(a[href^="/auth/login"]) {
-  display: none;
-}
-
-/* Without :has(), the link alone goes and the empty nav stays. */
-.session a[href^="/auth/login"] {
+/* Portal puts the way in beside the wordmark on every page of a site
+   that has sign-in at all, and there is no setting to turn it off:
+   `sign_in` follows whether OIDC is enabled on the instance. uhhm.no is
+   read and answered without an account, so the whole nav goes - signed
+   out, where it reads "Sign in", and signed in, where it reads a name
+   and "Sign out". Whoever edits the site goes to /auth/login and
+   /auth/logout directly. */
+.session {
   display: none;
 }