/* =====================================================================
   App shell — topbar e area contenuto
   ===================================================================== */
.app-shell__topbar {
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.app-shell__brand { display: flex; align-items: baseline; gap: 12px; }
.app-shell__logo { font-weight: 700; font-size: 17px; }
.app-shell__product { font-size: var(--fs-subtitle); opacity: .8; }
.app-shell__content { max-width: 1440px; margin: 0 auto; padding: 24px; }
.app-shell__fatal { max-width: 640px; margin: 40px auto; }