:root {
      --primary-color: #4CAF50;
      --primary-dark: #388E3C;
      --primary-light: #81C784;
      --secondary-color: #2196F3;
      --accent-color: #FF9800;
      --text-dark: #2c3e50;
      --text-light: #ffffff;
      --gradient-primary: linear-gradient(135deg, #4CAF50 0%, #45a049 50%, #388E3C 100%);
      --gradient-secondary: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
      --shadow-soft: 0 10px 30px rgba(0,0,0,0.1);
      --shadow-medium: 0 20px 40px rgba(0,0,0,0.15);
      --shadow-strong: 0 30px 60px rgba(0,0,0,0.2);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    /* Performance optimizations */
    .feature-card,
    .cta-button,
    .nav-links a {
      will-change: transform;
    }

    .particle {
      will-change: transform, opacity;
    }

    body {
      font-family: 'Poppins', sans-serif;
      line-height: 1.6;
      color: var(--text-dark);
      overflow-x: hidden;
    }

    /* Animated Background */
    .animated-bg {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--gradient-primary);
      z-index: -2;
    }

    .animated-bg::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
                  radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 50%),
                  radial-gradient(circle at 40% 80%, rgba(255,255,255,0.08) 0%, transparent 50%);
      animation: float 15s ease-in-out infinite;
    }

    @keyframes float {
      0%, 100% { transform: translateY(0px); }
      50% { transform: translateY(-10px); }
    }

    /* Floating Particles */
    .particles {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: -1;
    }

    .particle {
      position: absolute;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 50%;
      animation: particleFloat 15s linear infinite;
    }

    @keyframes particleFloat {
      0% {
        transform: translateY(100vh);
        opacity: 0;
      }
      10% {
        opacity: 0.6;
      }
      90% {
        opacity: 0.6;
      }
      100% {
        transform: translateY(-100px);
        opacity: 0;
      }
    }

    /* Navigation */
    nav {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      padding: 1rem 0;
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1000;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
    }

    nav.scrolled {
      background: rgba(255, 255, 255, 0.98);
      box-shadow: var(--shadow-medium);
    }

    .nav-container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0 2rem;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary-color);
      text-decoration: none;
      transition: all 0.3s ease;
    }

    .logo:hover {
      transform: scale(1.05);
      color: var(--primary-dark);
    }

    .nav-links {
      display: flex;
      list-style: none;
      gap: 2rem;
    }

    .nav-links a {
      color: var(--text-dark);
      text-decoration: none;
      font-weight: 500;
      position: relative;
      transition: all 0.3s ease;
      padding: 0.5rem 1rem;
      border-radius: 25px;
    }

    .nav-links a::before {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--primary-color);
      transition: all 0.3s ease;
      transform: translateX(-50%);
    }

    .nav-links a:hover {
      color: var(--primary-color);
      background: rgba(76, 175, 80, 0.1);
      transform: translateY(-2px);
    }

    .nav-links a:hover::before {
      width: 80%;
    }

    /* Hero Section */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      color: var(--text-light);
      position: relative;
      padding: 0 2rem;
    }

    .hero-content {
      max-width: 800px;
      z-index: 2;
    }

    .hero h1 {
      font-size: clamp(2.5rem, 5vw, 4rem);
      font-weight: 800;
      margin-bottom: 1.5rem;
      color: var(--text-light);
      text-shadow: 0 0 20px rgba(255,255,255,0.3);
    }

    .hero p {
      font-size: 1.25rem;
      margin-bottom: 2.5rem;
      opacity: 0.9;
      font-weight: 300;
    }

    .cta-button {
      display: inline-block;
      padding: 1rem 2.5rem;
      background: var(--text-light);
      color: var(--primary-color);
      text-decoration: none;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1.1rem;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-medium);
      position: relative;
      overflow: hidden;
    }

    .cta-button::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
      transition: left 0.5s ease;
    }

    .cta-button:hover {
      transform: translateY(-3px) scale(1.05);
      box-shadow: var(--shadow-strong);
      background: #f8f9fa;
    }

    .cta-button:hover::before {
      left: 100%;
    }

    .cta-button:active {
      transform: translateY(-1px) scale(1.02);
    }

    /* Features Section */
    .features {
      padding: 5rem 2rem;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
    }

    .features-container {
      max-width: 1200px;
      margin: 0 auto;
    }

    .features h2 {
      text-align: center;
      font-size: 2.5rem;
      margin-bottom: 3rem;
      color: var(--text-dark);
      font-weight: 700;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 2rem;
      margin-top: 3rem;
    }

    .feature-card {
      background: var(--text-light);
      padding: 2.5rem;
      border-radius: 20px;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--gradient-primary);
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-medium);
    }

    .feature-icon {
      font-size: 3rem;
      color: var(--primary-color);
      margin-bottom: 1.5rem;
      display: block;
    }

    .feature-card h3 {
      font-size: 1.5rem;
      margin-bottom: 1rem;
      color: var(--text-dark);
      font-weight: 600;
    }

    .feature-card p {
      color: #666;
      line-height: 1.6;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .nav-container {
        flex-direction: column;
        gap: 1rem;
      }

      .nav-links {
        gap: 1rem;
      }

      .hero {
        padding: 2rem 1rem;
      }

      .features {
        padding: 3rem 1rem;
      }

      .features-grid {
        grid-template-columns: 1fr;
      }
    }

    /* Smooth Scrolling */
    html {
      scroll-behavior: smooth;
    }

    /* Loading Animation */
    .loading {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--gradient-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 9999;
      transition: opacity 0.5s ease;
    }

    .loading.hidden {
      opacity: 0;
      pointer-events: none;
    }

    .spinner {
      width: 50px;
      height: 50px;
      border: 3px solid rgba(255,255,255,0.3);
      border-top: 3px solid white;
      border-radius: 50%;
      animation: spin 1s linear infinite;
    }

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

    /* Chatbot Styles */
    .chatbot-container {
      position: fixed;
      bottom: 20px;
      right: 20px;
      width: 350px;
      height: 500px;
      background: white;
      border-radius: 20px;
      box-shadow: var(--shadow-strong);
      z-index: 1000;
      display: none;
      flex-direction: column;
      overflow: hidden;
      transform: translateY(100px);
      opacity: 0;
      transition: all 0.3s ease;
    }

    .chatbot-container.active {
      display: flex;
      transform: translateY(0);
      opacity: 1;
    }

    .chatbot-header {
      background: var(--gradient-primary);
      color: white;
      padding: 1rem;
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .chatbot-avatar {
      width: 40px;
      height: 40px;
      background: rgba(255,255,255,0.2);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
    }

    .chatbot-info h3 {
      margin: 0;
      font-size: 1rem;
      font-weight: 600;
    }

    .chatbot-info p {
      margin: 0;
      font-size: 0.8rem;
      opacity: 0.9;
    }

    .chatbot-close {
      background: none;
      border: none;
      color: white;
      font-size: 1.2rem;
      cursor: pointer;
      margin-left: auto;
      padding: 0.25rem;
      border-radius: 50%;
      transition: background 0.2s ease;
    }

    .chatbot-close:hover {
      background: rgba(255,255,255,0.2);
    }

    .chatbot-messages {
      flex: 1;
      padding: 1rem;
      overflow-y: auto;
      background: #f8f9fa;
    }

    .message {
      display: flex;
      margin-bottom: 1rem;
      animation: messageSlide 0.3s ease;
    }

    @keyframes messageSlide {
      from {
        opacity: 0;
        transform: translateY(10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .bot-message {
      justify-content: flex-start;
    }

    .user-message {
      justify-content: flex-end;
    }

    .message-avatar {
      width: 30px;
      height: 30px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      margin-right: 0.5rem;
      flex-shrink: 0;
    }

    .bot-message .message-avatar {
      background: var(--primary-color);
      color: white;
    }

    .user-message .message-avatar {
      background: var(--secondary-color);
      color: white;
      margin-right: 0;
      margin-left: 0.5rem;
    }

    .message-content {
      max-width: 80%;
      padding: 0.75rem 1rem;
      border-radius: 15px;
      font-size: 0.9rem;
      line-height: 1.4;
    }

    .bot-message .message-content {
      background: white;
      color: var(--text-dark);
      box-shadow: var(--shadow-soft);
    }

    .user-message .message-content {
      background: var(--secondary-color);
      color: white;
    }

    .message-content ul {
      margin: 0.5rem 0;
      padding-left: 1rem;
    }

    .message-content li {
      margin: 0.25rem 0;
    }

    .chatbot-input-container {
      padding: 1rem;
      background: white;
      border-top: 1px solid #e9ecef;
      display: flex;
      gap: 0.5rem;
    }

    #chatInput {
      flex: 1;
      padding: 0.75rem;
      border: 1px solid #e9ecef;
      border-radius: 25px;
      font-size: 0.9rem;
      outline: none;
      transition: border-color 0.2s ease;
    }

    #chatInput:focus {
      border-color: var(--primary-color);
    }

    .send-btn {
      width: 40px;
      height: 40px;
      background: var(--primary-color);
      color: white;
      border: none;
      border-radius: 50%;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s ease;
    }

    .send-btn:hover {
      background: var(--primary-dark);
      transform: scale(1.05);
    }

    .send-btn:active {
      transform: scale(0.95);
    }

    .chatbot-toggle {
      position: fixed;
      bottom: 20px;
      right: 20px;
      width: 60px;
      height: 60px;
      background: var(--primary-color);
      color: white;
      border: none;
      border-radius: 50%;
      cursor: pointer;
      font-size: 1.5rem;
      box-shadow: var(--shadow-medium);
      transition: all 0.3s ease;
      z-index: 999;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .chatbot-toggle:hover {
      background: var(--primary-dark);
      transform: scale(1.1);
    }

    .notification-badge {
      position: absolute;
      top: -5px;
      right: -5px;
      background: var(--accent-color);
      color: white;
      border-radius: 50%;
      width: 20px;
      height: 20px;
      font-size: 0.7rem;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .typing-indicator {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.75rem 1rem;
      background: white;
      border-radius: 15px;
      box-shadow: var(--shadow-soft);
      margin-bottom: 1rem;
    }

    .typing-dots {
      display: flex;
      gap: 0.25rem;
    }

    .typing-dot {
      width: 6px;
      height: 6px;
      background: var(--primary-color);
      border-radius: 50%;
      animation: typingDot 1.4s infinite ease-in-out;
    }

    .typing-dot:nth-child(1) { animation-delay: -0.32s; }
    .typing-dot:nth-child(2) { animation-delay: -0.16s; }

    @keyframes typingDot {
      0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
      }
      40% {
        transform: scale(1);
        opacity: 1;
      }
    }

    /* Responsive Chatbot */
    @media (max-width: 768px) {
      .chatbot-container {
        width: calc(100vw - 40px);
        height: calc(100vh - 100px);
        bottom: 10px;
        right: 10px;
        left: 10px;
      }

      .chatbot-toggle {
        bottom: 10px;
        right: 10px;
      }
    }