entListener('click', start);
      els.stopBtn.addEventListener('click', () => stop('stopped'));
      els.resetBtn.addEventListener('click', () => {
        if (confirm('Reset all saved high scores?')) {
          setHighStore({});
          updateHighUI();
          toast('High scores cleared');
        }
      });
      // Theme toggle removed; always use sepia
      els.submitBtn.addEventListener('click', submitAnswer);
      els.skipBtn.addEventListener('click', skip);
      els.answer.addEventListener