text: 
  const signUpButton = document.getElementById('signUp');
  const signInButton = document.getElementById('signIn');
  const container = document.getElementById('container');
  
  signUpButton.addEventListener('click', () => {
    container.classList.add('right-panel-active');
  });
  
  signInButton.addEventListener('click', () => {
    container.classList.remove('right-panel-active');
  });