Interactive Tab Menu

.tab-demo {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 320px;
  border-radius: 16px;
  padding: 30px;
  color: white;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.demo-content {
  text-align: center;
  margin-bottom: 30px;
}

.demo-content h2 {
  margin: 0 0 12px 0;
  font-size: 24px;
  font-weight: 700;
}

.demo-content p {
  margin: 0 0 20px 0;
  opacity: 0.9;
  line-height: 1.6;
}

.demo-controls h3 {
  margin: 0 0 12px 0;
  font-size: 16px;
  font-weight: 600;
}

.control-buttons {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

.control-btn {
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;
  color: white;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.control-btn:hover,
.control-btn.active {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.tab-container {
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.tab-menu {
  display: flex;
  background: #f8f9fa;
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 20px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.tab-menu::-webkit-scrollbar {
  display: none;
}

.tab-button {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: #6b7280;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  white-space: nowrap;
  min-width: fit-content;
}

.tab-button:hover {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

.tab-button.active {
  background: white;
  color: #3b82f6;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tab-icon {
  font-size: 16px;
}

.tab-indicator {
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: #3b82f6;
  border-radius: 1px;
  transition: width 0.3s ease;
}

.tab-button.active .tab-indicator {
  width: 80%;
}

.tab-content {
  position: relative;
  min-height: 300px;
}

.tab-panel {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
}

.tab-panel.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  position: relative;
}

.panel-content {
  color: #374151;
}

.panel-content h3 {
  margin: 0 0 16px 0;
  font-size: 20px;
  font-weight: 600;
  color: #1f2937;
}

.panel-content p {
  margin: 0 0 20px 0;
  line-height: 1.6;
  color: #6b7280;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.content-item {
  padding: 20px;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.content-item h4 {
  margin: 0 0 8px 0;
  font-size: 16px;
  font-weight: 600;
  color: #1f2937;
}

.content-item p {
  margin: 0;
  font-size: 14px;
  color: #6b7280;
}

.action-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.action-btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.action-btn.primary {
  background: #3b82f6;
  color: white;
}

.action-btn.primary:hover {
  background: #2563eb;
  transform: translateY(-1px);
}

.action-btn.secondary {
  background: #f3f4f6;
  color: #374151;
  border: 1px solid #d1d5db;
}

.action-btn.secondary:hover {
  background: #e5e7eb;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.feature-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.feature-info h4 {
  margin: 0 0 4px 0;
  font-size: 16px;
  font-weight: 600;
  color: #1f2937;
}

.feature-info p {
  margin: 0;
  font-size: 14px;
  color: #6b7280;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.pricing-card {
  padding: 24px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s ease;
}

.pricing-card.featured {
  border-color: #3b82f6;
  background: #eff6ff;
  transform: scale(1.05);
}

.pricing-card h4 {
  margin: 0 0 12px 0;
  font-size: 18px;
  font-weight: 600;
  color: #1f2937;
}

.price {
  font-size: 32px;
  font-weight: 700;
  color: #3b82f6;
  margin-bottom: 16px;
}

.price span {
  font-size: 16px;
  color: #6b7280;
}

.features {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
}

.features li {
  padding: 4px 0;
  font-size: 14px;
  color: #374151;
}

.pricing-btn {
  width: 100%;
  padding: 10px;
  background: #3b82f6;
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.pricing-btn:hover {
  background: #2563eb;
}

.support-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.support-item {
  text-align: center;
  padding: 20px;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.support-icon {
  font-size: 32px;
  margin-bottom: 12px;
  display: block;
}

.support-item h4 {
  margin: 0 0 8px 0;
  font-size: 16px;
  font-weight: 600;
  color: #1f2937;
}

.support-item p {
  margin: 0 0 8px 0;
  font-size: 14px;
  color: #6b7280;
}

.availability {
  display: inline-block;
  padding: 4px 8px;
  background: #dcfce7;
  color: #166534;
  font-size: 12px;
  border-radius: 4px;
  font-weight: 500;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.contact-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.contact-details h4 {
  margin: 0 0 4px 0;
  font-size: 14px;
  font-weight: 600;
  color: #1f2937;
}

.contact-details p {
  margin: 0;
  font-size: 14px;
  color: #6b7280;
}

.contact-form {
  background: #f9fafb;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.contact-form h4 {
  margin: 0 0 16px 0;
  font-size: 16px;
  font-weight: 600;
  color: #1f2937;
}

.demo-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-input,
.form-textarea {
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: #3b82f6;
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-submit {
  padding: 10px;
  background: #3b82f6;
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.form-submit:hover {
  background: #2563eb;
}

.tab-info {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.info-label {
  font-size: 12px;
  opacity: 0.8;
  font-weight: 500;
}

.info-value {
  font-size: 14px;
  font-weight: 600;
}

/* Tab style variations */
.tab-menu.rounded .tab-button {
  border-radius: 20px;
}

.tab-menu.minimal {
  background: transparent;
  padding: 0;
  border-bottom: 1px solid #e5e7eb;
}

.tab-menu.minimal .tab-button {
  border-radius: 0;
  border-bottom: 2px solid transparent;
}

.tab-menu.minimal .tab-button.active {
  background: transparent;
  border-bottom-color: #3b82f6;
  box-shadow: none;
}

.tab-menu.pills .tab-button {
  border-radius: 20px;
  margin: 0 4px;
}

.tab-menu.pills .tab-button.active {
  background: #3b82f6;
  color: white;
}

/* Responsive design */
@media (max-width: 768px) {
  .tab-demo {
    padding: 20px;
  }
  
  .tab-menu {
    flex-direction: column;
    gap: 4px;
  }
  
  .tab-button {
    justify-content: center;
  }
  
  .content-grid,
  .pricing-grid,
  .support-options,
  .contact-info {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .control-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .control-btn {
    width: 100px;
  }
  
  .tab-info {
    flex-direction: column;
    gap: 12px;
  }
}

/* Focus styles for accessibility */
.tab-button:focus,
.action-btn:focus,
.pricing-btn:focus,
.form-submit:focus,
.control-btn:focus {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* Loading animation */
.tab-panel.loading {
  opacity: 0.6;
}

.tab-panel.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  border: 2px solid #e5e7eb;
  border-top: 2px solid #3b82f6;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

document.addEventListener('DOMContentLoaded', function() {
  const tabButtons = document.querySelectorAll('.tab-button');
  const tabPanels = document.querySelectorAll('.tab-panel');
  const tabMenu = document.querySelector('.tab-menu');
  const controlButtons = document.querySelectorAll('.control-btn');
  const activeTab = document.getElementById('activeTab');
  const tabStyle = document.getElementById('tabStyle');
  const totalTabs = document.getElementById('totalTabs');
  
  // Initialize tab functionality
  function initTabs() {
    tabButtons.forEach((button, index) => {
      button.addEventListener('click', function() {
        const tabId = this.getAttribute('data-tab');
        switchTab(tabId, this);
      });
      
      // Keyboard navigation
      button.addEventListener('keydown', function(e) {
        let targetIndex;
        
        switch(e.key) {
          case 'ArrowLeft':
            e.preventDefault();
            targetIndex = index > 0 ? index - 1 : tabButtons.length - 1;
            tabButtons[targetIndex].focus();
            break;
          case 'ArrowRight':
            e.preventDefault();
            targetIndex = index < tabButtons.length - 1 ? index + 1 : 0;
            tabButtons[targetIndex].focus();
            break;
          case 'Home':
            e.preventDefault();
            tabButtons[0].focus();
            break;
          case 'End':
            e.preventDefault();
            tabButtons[tabButtons.length - 1].focus();
            break;
          case 'Enter':
          case ' ':
            e.preventDefault();
            this.click();
            break;
        }
      });
    });
  }
  
  // Switch tab function
  function switchTab(tabId, clickedButton) {
    // Add loading state
    const targetPanel = document.getElementById(`tab-panel-${getTabIndex(tabId) + 1}`);
    targetPanel.classList.add('loading');
    
    setTimeout(() => {
      // Remove active class from all buttons and panels
      tabButtons.forEach(btn => {
        btn.classList.remove('active');
        btn.setAttribute('aria-selected', 'false');
      });
      
      tabPanels.forEach(panel => {
        panel.classList.remove('active');
      });
      
      // Add active class to clicked button and corresponding panel
      clickedButton.classList.add('active');
      clickedButton.setAttribute('aria-selected', 'true');
      targetPanel.classList.add('active');
      targetPanel.classList.remove('loading');
      
      // Update info
      updateTabInfo(clickedButton.querySelector('.tab-text').textContent);
      
      // Show feedback
      showFeedback(`Switched to ${clickedButton.querySelector('.tab-text').textContent} tab`);
    }, 300);
  }
  
  // Get tab index by tab ID
  function getTabIndex(tabId) {
    const tabIds = ['overview', 'features', 'pricing', 'support', 'contact'];
    return tabIds.indexOf(tabId);
  }
  
  // Update tab info
  function updateTabInfo(tabName) {
    activeTab.textContent = tabName;
  }
  
  // Style control handlers
  controlButtons.forEach(button => {
    button.addEventListener('click', function() {
      const style = this.getAttribute('data-style');
      
      // Update active button
      controlButtons.forEach(btn => btn.classList.remove('active'));
      this.classList.add('active');
      
      // Update tab menu style
      tabMenu.className = 'tab-menu';
      if (style !== 'default') {
        tabMenu.classList.add(style);
      }
      
      // Update style info
      const styleNames = {
        default: 'Default',
        rounded: 'Rounded',
        minimal: 'Minimal',
        pills: 'Pills'
      };
      tabStyle.textContent = styleNames[style];
      
      showFeedback(`Changed to ${styleNames[style]} style`);
    });
  });
  
  // Form submission handler
  const demoForm = document.querySelector('.demo-form');
  if (demoForm) {
    demoForm.addEventListener('submit', function(e) {
      e.preventDefault();
      
      const formData = new FormData(this);
      const name = this.querySelector('input[type="text"]').value;
      const email = this.querySelector('input[type="email"]').value;
      const message = this.querySelector('textarea').value;
      
      if (name && email && message) {
        showFeedback('Message sent successfully!');
        this.reset();
      } else {
        showFeedback('Please fill in all fields');
      }
    });
  }
  
  // Action button handlers
  const actionButtons = document.querySelectorAll('.action-btn, .pricing-btn');
  actionButtons.forEach(button => {
    button.addEventListener('click', function() {
      const action = this.textContent.trim();
      showFeedback(`${action} clicked!`);
    });
  });
  
  // Auto-rotate tabs (optional)
  let autoRotate = false;
  let rotateInterval;
  
  function startAutoRotate() {
    if (autoRotate) return;
    
    autoRotate = true;
    let currentIndex = 0;
    
    rotateInterval = setInterval(() => {
      currentIndex = (currentIndex + 1) % tabButtons.length;
      tabButtons[currentIndex].click();
    }, 5000);
  }
  
  function stopAutoRotate() {
    autoRotate = false;
    if (rotateInterval) {
      clearInterval(rotateInterval);
    }
  }
  
  // Stop auto-rotate on user interaction
  tabButtons.forEach(button => {
    button.addEventListener('click', stopAutoRotate);
  });
  
  // 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;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
      color: white;
      padding: 12px 20px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 500;
      z-index: 10001;
      box-shadow: 0 4px 15px rgba(72, 187, 120, 0.3);
      opacity: 0;
      transition: opacity 0.3s ease;
    `;
    
    document.body.appendChild(feedback);
    
    requestAnimationFrame(() => {
      feedback.style.opacity = '1';
    });
    
    setTimeout(() => {
      feedback.style.opacity = '0';
      setTimeout(() => feedback.remove(), 300);
    }, 2500);
  }
  
  // Initialize
  initTabs();
  updateTabInfo('Overview');
  totalTabs.textContent = tabButtons.length;
  
  // Initial feedback
  setTimeout(() => {
    showFeedback('Try different tab styles and navigate with keyboard arrows!');
  }, 1000);
  
  // Optional: Start auto-rotate after delay
  // setTimeout(startAutoRotate, 10000);
});