:root {
      --primary-color: #165EFE;
      --secondary-color: #4a44c6;
      --accent-color: #ff6584;
      --dark-color: #2d2b55;
      --light-color: #f8f9fa;
      --gray-color: #6c757d;
      --border-radius: 12px;
      --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      
      /* Light mode variables */
      --bg-color: #f8f9fa;
      --card-bg: #ffffff;
      --text-color: #333333;
      --card-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
      --card-border: 1px solid rgba(0, 0, 0, 0.03);
      --section-bg: #ffffff;
      --input-bg: #ffffff;
      --footer-bg: linear-gradient(135deg, #2d2b55, #1a1a2e);
    }

    [data-theme="dark"] {
      --bg-color: #0f172a;
      --card-bg: #1e293b;
      --text-color: #e2e8f0;
      --card-shadow: 0 15px 35px rgba(0, 0, 0, 0.25);
      --card-border: 1px solid rgba(255, 255, 255, 0.05);
      --section-bg: #1e293b;
      --input-bg: #2d3748;
      --footer-bg: linear-gradient(135deg, #0f172a, #1e293b);
      --light-color: #1e293b;
    }

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

    body {
      font-family: 'Inter', sans-serif;
      color: var(--text-color);
      line-height: 1.6;
      background-color: var(--bg-color);
      overflow-x: hidden;
      transition: background-color 0.5s ease, color 0.5s ease;
    }

    h1,
    h2,
    h3,
    h4,
    h5 {
      font-family: 'Poppins', sans-serif;
      font-weight: 700;
    }

    /* Preloader */
    .preloader {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--bg-color);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 9999;
      transition: opacity 0.5s ease, visibility 0.5s ease;
    }

    .preloader.hidden {
      opacity: 0;
      visibility: hidden;
    }

    .loader {
      width: 50px;
      height: 50px;
      border: 5px solid rgba(22, 94, 254, 0.2);
      border-radius: 50%;
      border-top-color: var(--primary-color);
      animation: spin 1s linear infinite;
    }

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

    /* Theme Toggle */
    .theme-toggle {
      position: fixed;
      bottom: 30px;
      right: 30px;
      z-index: 1000;
      width: 60px;
      height: 60px;
      border-radius: 50%;
      background: var(--primary-color);
      color: white;
      border: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
      transition: var(--transition);
    }

    .theme-toggle:hover {
      transform: scale(1.1) rotate(30deg);
      box-shadow: 0 8px 25px rgba(22, 94, 254, 0.3);
    }

    .theme-toggle .sun {
      display: none;
    }

    .theme-toggle .moon {
      display: block;
    }

    [data-theme="dark"] .theme-toggle .sun {
      display: block;
    }

    [data-theme="dark"] .theme-toggle .moon {
      display: none;
    }

    /* Back to Top */
    .back-to-top {
      position: fixed;
      bottom: 100px;
      right: 30px;
      z-index: 999;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary-color);
      color: white;
      border: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      opacity: 0;
      visibility: hidden;
      transform: translateY(20px);
      transition: all 0.3s ease;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }

    .back-to-top.visible {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .back-to-top:hover {
      transform: translateY(-5px);
      background: var(--secondary-color);
    }

    /* Enhanced Navigation */
    .navbar {
      padding: 1.2rem 0;
      background: rgba(255, 255, 255, 0.95) !important;
      backdrop-filter: blur(10px);
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
      transition: var(--transition);
    }

    [data-theme="dark"] .navbar {
      background: rgba(30, 41, 59, 0.95) !important;
      box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    }

    .navbar.scrolled {
      padding: 0.8rem 0;
      box-shadow: 0 5px 25px rgba(0, 0, 0, 0.1);
    }

    .nav-link {
      position: relative;
      font-weight: 500;
      margin: 0 0.5rem;
      transition: var(--transition);
      color: var(--text-color) !important;
    }

    .nav-link:after {
      content: '';
      position: absolute;
      width: 0;
      height: 3px;
      background: var(--primary-color);
      left: 50%;
      bottom: 0;
      border-radius: 3px;
      transition: all 0.3s ease;
      transform: translateX(-50%);
    }

    .nav-link:hover:after,
    .nav-link.active:after {
      width: 80%;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--primary-color) !important;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      border: none;
      padding: 0.8rem 2rem;
      border-radius: 50px;
      font-weight: 600;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
      z-index: 1;
    }

    .btn-primary:before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
      transition: all 0.5s ease;
      z-index: -1;
    }

    .btn-primary:hover:before {
      left: 0;
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 25px rgba(22, 94, 254, 0.3);
    }

    .btn-outline-primary {
      border: 2px solid var(--primary-color);
      color: var(--primary-color);
      padding: 0.8rem 2rem;
      border-radius: 50px;
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-outline-primary:hover {
      background-color: var(--primary-color);
      color: white;
      transform: translateY(-3px);
      box-shadow: 0 10px 25px rgba(22, 94, 254, 0.2);
    }

    /* Enhanced Hero Section */
    .hero-section {
      padding: 8rem 0 6rem;
      background: linear-gradient(135deg, var(--bg-color), var(--light-color));
      position: relative;
      overflow: hidden;
      transition: background 0.5s ease;
    }

    .hero-section:before {
      content: '';
      position: absolute;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: linear-gradient(135deg, rgba(22, 94, 254, 0.1), rgba(74, 68, 198, 0.1));
      top: -150px;
      right: -150px;
      transition: background 0.5s ease;
    }

    [data-theme="dark"] .hero-section:before {
      background: linear-gradient(135deg, rgba(22, 94, 254, 0.08), rgba(74, 68, 198, 0.08));
    }

    .hero-section:after {
      content: '';
      position: absolute;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: linear-gradient(135deg, rgba(22, 94, 254, 0.08), rgba(74, 68, 198, 0.08));
      bottom: -100px;
      left: -100px;
      transition: background 0.5s ease;
    }

    [data-theme="dark"] .hero-section:after {
      background: linear-gradient(135deg, rgba(22, 94, 254, 0.05), rgba(74, 68, 198, 0.05));
    }

    .hero-title {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      background: linear-gradient(135deg, var(--dark-color), var(--primary-color));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      animation: fadeInUp 1s ease-out;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--gray-color);
      margin-bottom: 2.5rem;
      max-width: 90%;
      animation: fadeInUp 1s ease-out 0.2s both;
      transition: color 0.5s ease;
    }

    .hero-visual-card {
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      padding: 2.5rem;
      box-shadow: var(--card-shadow);
      border: var(--card-border);
      transition: var(--transition);
      animation: float 6s ease-in-out infinite;
      position: relative;
      z-index: 2;
    }

    .hero-visual-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
    }

    .card-icon {
      width: 80px;
      height: 80px;
      border-radius: 20px;
      background: linear-gradient(135deg, rgba(22, 94, 254, 0.1), rgba(74, 68, 198, 0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.5rem;
      color: var(--primary-color);
      font-size: 2.5rem;
      transition: var(--transition);
    }

    .hero-visual-card:hover .card-icon {
      transform: scale(1.1) rotate(5deg);
      background: linear-gradient(135deg, rgba(22, 94, 254, 0.2), rgba(74, 68, 198, 0.2));
    }

    /* Enhanced Features Section */
    .section-title {
      font-size: 2.5rem;
      font-weight: 800;
      margin-bottom: 1rem;
      position: relative;
      display: inline-block;
      color: var(--text-color);
    }

    .section-title:after {
      content: '';
      position: absolute;
      width: 60px;
      height: 5px;
      background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
      bottom: -10px;
      left: 0;
      border-radius: 5px;
    }

    .section-subtitle {
      font-size: 1.1rem;
      color: var(--gray-color);
      margin-bottom: 3rem;
      max-width: 700px;
      transition: color 0.5s ease;
    }

    .feature-card {
      background: var(--card-bg);
      border-radius: 20px;
      padding: 2.5rem;
      height: 100%;
      box-shadow: var(--card-shadow);
      border: var(--card-border);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .feature-card:before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 5px;
      background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.5s ease;
    }

    .feature-card:hover:before {
      transform: scaleX(1);
    }

    .feature-card:hover {
      transform: translateY(-15px);
      box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    }

    .feature-card .card-icon {
      width: 70px;
      height: 70px;
      font-size: 2rem;
      margin-bottom: 1.5rem;
    }

    .feature-card h5 {
      font-size: 1.4rem;
      margin-bottom: 1rem;
      color: var(--text-color);
    }

    .feature-card p {
      color: var(--gray-color);
      transition: color 0.5s ease;
    }

    /* Enhanced About Section */
    .about-section {
      position: relative;
      overflow: hidden;
      background: var(--section-bg);
      transition: background 0.5s ease;
    }

    .about-section:before {
      content: '';
      position: absolute;
      width: 400px;
      height: 400px;
      border-radius: 50%;
      background: linear-gradient(135deg, rgba(22, 94, 254, 0.05), rgba(74, 68, 198, 0.05));
      top: 50%;
      right: -200px;
      transform: translateY(-50%);
      transition: background 0.5s ease;
    }

    [data-theme="dark"] .about-section:before {
      background: linear-gradient(135deg, rgba(22, 94, 254, 0.03), rgba(74, 68, 198, 0.03));
    }

    .feature-list li {
      padding: 0.5rem 0;
      font-size: 1.1rem;
      transition: var(--transition);
      border-radius: 8px;
      padding-left: 1rem;
      color: var(--text-color);
    }

    .feature-list li:hover {
      background: rgba(22, 94, 254, 0.05);
      padding-left: 1.5rem;
    }

    /* Enhanced CTA Section */
    .cta-section {
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      position: relative;
      overflow: hidden;
      padding: 6rem 0;
    }

    .cta-section:before {
      content: '';
      position: absolute;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.05);
      top: -150px;
      right: -150px;
    }

    .cta-section:after {
      content: '';
      position: absolute;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.05);
      bottom: -100px;
      left: -100px;
    }

    .cta-section h2 {
      font-size: 2.8rem;
      margin-bottom: 1.5rem;
    }
    .text-heading{
      color : var(--gray-color);
    }

    .cta-section .btn-light {
      background: white;
      color: var(--primary-color);
      padding: 1rem 3rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1.1rem;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
      z-index: 1;
    }

    .cta-section .btn-light:before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: rgba(255, 255, 255, 0.9);
      transition: all 0.5s ease;
      z-index: -1;
    }

    .cta-section .btn-light:hover:before {
      left: 0;
    }

    .cta-section .btn-light:hover {
      transform: translateY(-5px) scale(1.05);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    }

    .btn-outline-light {
      border: 2px solid white;
      color: white;
      background: transparent;
      padding: 1rem 2.5rem;
      border-radius: 50px;
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-outline-light:hover {
      background: white;
      color: var(--primary-color);
      transform: translateY(-5px);
    }

    /* Enhanced Footer */
    footer {
      background: var(--footer-bg);
      position: relative;
      overflow: hidden;
      transition: background 0.5s ease;
    }

    footer:before {
      content: '';
      position: absolute;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.03);
      top: -100px;
      right: -100px;
    }

    /* Stats Cards */
    .stats-card {
      background: var(--card-bg);
      padding: 1.5rem;
      border-radius: var(--border-radius);
      text-align: center;
      transition: var(--transition);
      border: var(--card-border);
    }

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

    /* Badges */
    .badge {
      padding: 0.5rem 1rem;
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 500;
    }

    /* Animations */
    @keyframes float {

      0%,
      100% {
        transform: translateY(0);
      }

      50% {
        transform: translateY(-20px);
      }
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(30px);
      }

      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes pulse {
      0% {
        transform: scale(1);
      }

      50% {
        transform: scale(1.05);
      }

      100% {
        transform: scale(1);
      }
    }

    @keyframes slideInLeft {
      from {
        opacity: 0;
        transform: translateX(-50px);
      }

      to {
        opacity: 1;
        transform: translateX(0);
      }
    }

    @keyframes slideInRight {
      from {
        opacity: 0;
        transform: translateX(50px);
      }

      to {
        opacity: 1;
        transform: translateX(0);
      }
    }

    /* Animation Classes */
    .animate-on-scroll {
      opacity: 0;
      transform: translateY(30px);
      transition: all 0.8s ease;
    }

    .animate-on-scroll.animated {
      opacity: 1;
      transform: translateY(0);
    }

    .pulse-animation {
      animation: pulse 2s infinite;
    }

    .slide-in-left {
      animation: slideInLeft 1s ease-out;
    }

    .slide-in-right {
      animation: slideInRight 1s ease-out;
    }

    /* Progress Bar */
    .progress {
      background-color: rgba(22, 94, 254, 0.1);
      border-radius: 4px;
      overflow: hidden;
    }

    .progress-bar {
      background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
      transition: width 1s ease-in-out;
    }

    /* Responsive Design */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.8rem;
      }

      .section-title {
        font-size: 2.2rem;
      }

      .cta-section h2 {
        font-size: 2.3rem;
      }
      
      .theme-toggle {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
      }
      
      .back-to-top {
        bottom: 80px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1rem;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.3rem;
      }

      .section-title {
        font-size: 1.9rem;
      }

      .hero-visual-card {
        margin-top: 3rem;
      }

      .btn,
      .btn-outline-primary {
        width: 100%;
        margin-bottom: 1rem;
      }

      .d-flex.gap-3 {
        flex-direction: column;
      }
    }

    @media (max-width: 576px) {
      .hero-title {
        font-size: 2rem;
      }

      .hero-subtitle {
        font-size: 1.1rem;
      }

      .section-title {
        font-size: 1.7rem;
      }
    }