function SessionWarningBanner({ onSnooze }) {
  return (
    <div className="alert alert-warning alert-dismissible fade show m-0 rounded-0 session-warning-banner"
         role="alert">
      <strong>Warning:</strong> Your session will expire in less than 15 minutes due to inactivity.
      Please save your work soon.
      <button type="button" className="btn-close" aria-label="Close" onClick={onSnooze} />
    </div>
  );
}