.sidebar-demo {
  display: flex;
  height: 380px;
  background: #f8fafc;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

.sidebar {
  width: 280px;
  background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
  color: white;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.1);
}

.sidebar.collapsed {
  width: 80px;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 24px;
  min-width: 24px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  transition: opacity 0.3s ease;
}

.sidebar.collapsed .logo-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.toggle-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.toggle-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.toggle-icon {
  font-size: 18px;
  font-weight: bold;
  transition: transform 0.3s ease;
}

.sidebar.collapsed .toggle-icon {
  transform: rotate(180deg);
}

.sidebar-nav {
  flex: 1;
  padding: 20px 0;
  overflow-y: auto;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 4px 0;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all 0.3s ease;
  border-radius: 0 25px 25px 0;
  margin-right: 20px;
  position: relative;
  overflow: hidden;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  transform: translateX(5px);
}

.nav-item.active .nav-link {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.nav-icon {
  font-size: 20px;
  min-width: 20px;
  text-align: center;
}

.nav-text {
  font-weight: 500;
  transition: opacity 0.3s ease;
}

.sidebar.collapsed .nav-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sidebar.collapsed .nav-link {
  justify-content: center;
  margin-right: 0;
  border-radius: 12px;
  margin: 4px 12px;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  min-width: 40px;
}

.user-info {
  display: flex;
  flex-direction: column;
  transition: opacity 0.3s ease;
}

.user-name {
  font-weight: 600;
  font-size: 14px;
}

.user-role {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
}

.sidebar.collapsed .user-info {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.main-content {
  flex: 1;
  padding: 40px;
  background: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.main-content h2 {
  color: #1e293b;
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 16px 0;
}

.main-content p {
  color: #64748b;
  margin: 8px 0;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    position: absolute;
    left: -280px;
    z-index: 1000;
    height: 100%;
  }
  
  .sidebar.mobile-open {
    left: 0;
  }
  
  .main-content {
    padding: 20px;
  }
}

              

                document.addEventListener('DOMContentLoaded', function() {
  const sidebar = document.getElementById('sidebar');
  const toggleBtn = document.getElementById('toggleBtn');
  const navLinks = document.querySelectorAll('.nav-link');
  
  // Toggle sidebar
  if (toggleBtn && sidebar) {
    toggleBtn.addEventListener('click', function() {
      sidebar.classList.toggle('collapsed');
      
      // Show feedback
      const isCollapsed = sidebar.classList.contains('collapsed');
      showFeedback(isCollapsed ? 'Barra lateral colapsada' : 'Barra lateral expandida');
    });
  }
  
  // Handle nav link clicks
  navLinks.forEach(link => {
    link.addEventListener('click', function(e) {
      e.preventDefault();
      
      // Remove active class from all items
      document.querySelectorAll('.nav-item').forEach(item => {
        item.classList.remove('active');
      });
      
      // Add active class to clicked item
      this.closest('.nav-item').classList.add('active');
      
      const linkText = this.querySelector('.nav-text').textContent;
      showFeedback(`Navegado a: \${linkText}`);
    });
  });
  
  // Mobile responsive
  function handleResize() {
    if (window.innerWidth <= 768) {
      sidebar.classList.remove('collapsed');
    }
  }
  
  window.addEventListener('resize', handleResize);
  handleResize();
  
  // Feedback function
  function showFeedback(message) {
    const existing = document.querySelector('.demo-feedback');
    if (existing) existing.remove();
    
    const feedback = document.createElement('div');
    feedback.className = 'demo-feedback';
    feedback.textContent = message;
    feedback.style.cssText = `
      position: fixed;
      top: 20px;
      right: 20px;
      background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
      color: white;
      padding: 12px 20px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 500;
      z-index: 10001;
      box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
      transform: translateX(100%);
      transition: transform 0.3s ease;
    `;
    
    document.body.appendChild(feedback);
    
    requestAnimationFrame(() => {
      feedback.style.transform = 'translateX(0)';
    });
    
    setTimeout(() => {
      feedback.style.transform = 'translateX(100%)';
      setTimeout(() => feedback.remove(), 300);
    }, 2500);
  }
  
  // Initial feedback
  setTimeout(() => {
    showFeedback('¡Prueba el botón de alternar!');
  }, 1000);
});