<script>
function showNotification(type, message, duration = 5000) {
  const container = document.getElementById('notificationContainer');
  const notification = document.createElement('div');
  notification.className = `notification ${type}`;
  notification.innerHTML = `
    ${message}
    <button class="close-notification" aria-label="Закрыть">&times;</button>
`;
  container.appendChild(notification);

  // Автоматическое скрытие
  const timer = setTimeout(() => {
    removeNotification(notification);
  }, duration);

  // Закрытие по клику
  notification.querySelector('.close-notification').addEventListener('click', () => {
    clearTimeout(timer);
    removeNotification(notification);
  });
}

function removeNotification(el) {
  el.style.animation = 'slideOutRight 0.3s forwards';
  setTimeout(() => el.remove(), 300);
}

// Анимация исчезновения
const style = document.createElement('style');
style.textContent = `
  @keyframes slideOutRight {
    to {
      transform: translateX(100%);
      opacity: 0;
    }
  }
`;
document.head.appendChild(style);
</script>