/* vt-1035 W3 → vt-1031 P1.4: platform SPA base styles.
   The shell + nav layout now come from the shared portal CSS
   (tokens + components + shell-clean + roles + pages). The legacy
   .pa-topbar / #pa-nav{display:flex} / body bg rules were removed — they
   forced a horizontal top nav and overrode the design tokens, breaking the
   left-rail (app--rail / app-side). Keep this file as a thin hook for any
   platform-only tweaks. */