.client-update-banner {
  position: fixed;
  z-index: 4000;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: min(720px, calc(100vw - 24px));
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border: 1px solid var(--primary-500);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-md);
}
.client-update-banner p { color: var(--ink-600); font-size: 13px; margin-top: 4px; }
.client-update-banner button { flex-shrink: 0; margin-left: auto; }
@media (max-width: 520px) {
  .client-update-banner { align-items: stretch; flex-direction: column; gap: 10px; }
}