:root {
      --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
      --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
      --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
      --dark-bg: #0a0a0a;
      --card-bg: rgba(255, 255, 255, 0.05);
      --glass-border: rgba(255, 255, 255, 0.1);
      --text-primary: #ffffff;
      --text-secondary: rgba(255, 255, 255, 0.8);
      --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    }

    /* Light mode variables */
    [data-theme="light"] {
      --dark-bg: #f8f9fa;
      --card-bg: rgba(255, 255, 255, 0.8);
      --glass-border: rgba(0, 0, 0, 0.1);
      --text-primary: #212529;
      --text-secondary: rgba(33, 37, 41, 0.8);
      --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.2);
    }

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

    body {
      font-family: 'Inter', sans-serif;
      background: var(--dark-bg);
      color: var(--text-primary);
      overflow-x: hidden;
      line-height: 1.6;
      transition: all 0.3s ease;
    }

    .bg-pattern {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      opacity: 0.03;
      background-image: 
        radial-gradient(circle at 25% 25%, #667eea 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, #764ba2 0%, transparent 50%);
      z-index: -1;
      animation: patternFloat 20s ease-in-out infinite;
    }

    [data-theme="light"] .bg-pattern {
      opacity: 0.02;
    }

    @keyframes patternFloat {
      0%, 100% { transform: translateY(0px) rotate(0deg); }
      50% { transform: translateY(-20px) rotate(2deg); }
    }

    /* Navbar Styles */
    .navbar {
      background: rgba(10, 10, 10, 0.9) !important;
      backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--glass-border);
      transition: all 0.3s ease;
      padding: 0.5rem 0;
      height: 70px;
    }

    [data-theme="light"] .navbar {
      background: rgba(248, 249, 250, 0.9) !important;
    }

    .navbar.scrolled {
      background: rgba(10, 10, 10, 0.95) !important;
      box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
    }

    [data-theme="light"] .navbar.scrolled {
      background: rgba(248, 249, 250, 0.95) !important;
      box-shadow: 0 5px 30px rgba(0, 0, 0, 0.1);
    }

    .navbar-brand img {
      filter: brightness(1.1);
      transition: transform 0.3s ease;
      height: 40px;
      width: auto;
    }

    .navbar-brand:hover img {
      transform: scale(1.05);
    }

    .theme-toggle {
      background: transparent;
      border: 2px solid rgba(255, 255, 255, 0.2);
      color: var(--text-primary);
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    [data-theme="light"] .theme-toggle {
      border-color: rgba(0, 0, 0, 0.2);
    }

    .theme-toggle::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: var(--primary-gradient);
      transition: left 0.3s ease;
      z-index: -1;
      border-radius: 50%;
    }

    .theme-toggle:hover::before {
      left: 0;
    }

    .theme-toggle:hover {
      border-color: transparent;
      color: white;
      transform: scale(1.1);
    }

    .btn-outline-light {
      border: 2px solid rgba(255, 255, 255, 0.2);
      color: var(--text-primary);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      padding: 0.5rem 1.5rem;
      font-size: 0.9rem;
    }

    [data-theme="light"] .btn-outline-light {
      border-color: rgba(0, 0, 0, 0.2);
      color: var(--text-primary);
    }

    .btn-outline-light::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: var(--primary-gradient);
      transition: left 0.3s ease;
      z-index: -1;
    }

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

    .btn-outline-light:hover {
      border-color: transparent;
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
    }

    /* Hero Section */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background: linear-gradient(135deg, var(--dark-bg) 0%, #1a1a2e 50%, var(--dark-bg) 100%);
      overflow: hidden;
      padding-top: 70px; /* Account for fixed navbar */
    }

    [data-theme="light"] .hero-section {
      background: linear-gradient(135deg, var(--dark-bg) 0%, #e9ecef 50%, var(--dark-bg) 100%);
    }

    .hero-bg-elements {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 1;
    }

    .floating-element {
      position: absolute;
      border-radius: 50%;
      background: var(--primary-gradient);
      opacity: 0.1;
      animation: float 6s ease-in-out infinite;
    }

    .floating-element:nth-child(1) { 
      width: 80px; height: 80px; top: 20%; left: 10%; 
      animation-delay: 0s;
    }
    .floating-element:nth-child(2) { 
      width: 120px; height: 120px; top: 60%; right: 15%; 
      animation-delay: 2s;
    }
    .floating-element:nth-child(3) { 
      width: 60px; height: 60px; bottom: 30%; left: 20%; 
      animation-delay: 4s;
    }

    @keyframes float {
      0%, 100% { transform: translateY(0px) rotate(0deg); }
      50% { transform: translateY(-30px) rotate(180deg); }
    }

    .hero-content {
      position: relative;
      z-index: 2;
    }

    .hero-title {
      font-family: 'Space Grotesk', sans-serif;
      font-size: clamp(2rem, 5vw, 4.5rem);
      font-weight: 700;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 1.5rem;
      animation: slideUpFade 1s ease-out;
    }

    .hero-subtitle {
      font-size: clamp(1rem, 2vw, 1.4rem);
      color: var(--text-secondary);
      margin-bottom: 2rem;
      animation: slideUpFade 1s ease-out 0.2s both;
    }

    .hero-stats {
      display: flex;
      gap: 2rem;
      margin-bottom: 3rem;
      animation: slideUpFade 1s ease-out 0.4s both;
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-size: 2rem;
      font-weight: 700;
      background: var(--accent-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-secondary);
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .cta-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      animation: slideUpFade 1s ease-out 0.6s both;
    }

    .btn-primary-gradient {
      background: var(--primary-gradient);
      border: none;
      color: white;
      padding: 0.8rem 2rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    }

    .btn-primary-gradient::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
      transition: left 0.3s ease;
      z-index: -1;
    }

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

    .btn-primary-gradient:hover {
      transform: translateY(-3px);
      box-shadow: 0 15px 40px rgba(102, 126, 234, 0.5);
    }

    .btn-ghost {
      background: transparent;
      border: 2px solid rgba(255, 255, 255, 0.3);
      color: var(--text-primary);
      padding: 0.8rem 2rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.3s ease;
      backdrop-filter: blur(10px);
    }

    [data-theme="light"] .btn-ghost {
      border-color: rgba(0, 0, 0, 0.3);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.6);
      transform: translateY(-3px);
      color: var(--text-primary);
    }

    [data-theme="light"] .btn-ghost:hover {
      background: rgba(0, 0, 0, 0.1);
      border-color: rgba(0, 0, 0, 0.6);
    }

    .hero-image-container {
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .hero-image-container img {
      max-width: 100%;
      height: auto;
      border-radius: 20px;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    }

    @keyframes slideUpFade {
      from {
        opacity: 0;
        transform: translateY(50px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    /* Section Spacing */
    .section {
      padding: 4rem 0;
    }

    /* Features Section */
    .features-section {
      padding: 4rem 0;
      background: linear-gradient(180deg, var(--dark-bg) 0%, #111 100%);
      position: relative;
    }

    [data-theme="light"] .features-section {
      background: linear-gradient(180deg, var(--dark-bg) 0%, #e9ecef 100%);
    }

    .section-title {
      font-family: 'Space Grotesk', sans-serif;
      font-size: clamp(1.8rem, 4vw, 3.5rem);
      font-weight: 700;
      text-align: center;
      margin-bottom: 3rem;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .feature-card {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 20px;
      padding: 2rem 1.5rem;
      text-align: center;
      transition: all 0.3s ease;
      height: 100%;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: conic-gradient(transparent, rgba(102, 126, 234, 0.1), transparent, rgba(118, 75, 162, 0.1));
      animation: rotate 4s linear infinite;
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .feature-card:hover {
      transform: translateY(-10px);
      box-shadow: var(--shadow-glow);
      border-color: rgba(102, 126, 234, 0.3);
    }

    .feature-icon {
      width: 60px;
      height: 60px;
      background: var(--primary-gradient);
      border-radius: 15px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.5rem;
      font-size: 1.5rem;
      color: white;
      transition: all 0.3s ease;
    }

    .feature-card:hover .feature-icon {
      transform: scale(1.1) rotate(5deg);
    }

    .feature-title {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 1rem;
      color: var(--text-primary);
    }

    .feature-description {
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    @keyframes rotate {
      from { transform: rotate(0deg); }
      to { transform: rotate(360deg); }
    }

    /* How It Works Section */
    .how-it-works {
      padding: 4rem 0;
      background: linear-gradient(135deg, #111 0%, #1a1a2e 50%, #111 100%);
    }

    [data-theme="light"] .how-it-works {
      background: linear-gradient(135deg, #e9ecef 0%, #f8f9fa 50%, #e9ecef 100%);
    }

    .step-card {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 20px;
      padding: 2rem;
      text-align: center;
      transition: all 0.3s ease;
      position: relative;
      margin-bottom: 1.5rem;
    }

    .step-number {
      position: absolute;
      top: -20px;
      left: 50%;
      transform: translateX(-50%);
      width: 40px;
      height: 40px;
      background: var(--primary-gradient);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: white;
      font-size: 1.2rem;
    }

    .step-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }

    /* Earn Credits Section */
    .earn-credits {
      padding: 4rem 0;
      background: var(--dark-bg);
      position: relative;
    }

    .credit-card {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 20px;
      padding: 2.5rem;
      text-align: center;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .credit-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
      transition: left 0.5s ease;
    }

    .credit-card:hover::after {
      left: 100%;
    }

    .credit-card:hover {
      transform: scale(1.02);
      box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    }

    .credit-icon {
      width: 80px;
      height: 80px;
      background: var(--success-gradient);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.5rem;
      font-size: 2rem;
      color: white;
    }

    /* FAQ Section */
    .faq-section {
      padding: 4rem 0;
      background: linear-gradient(135deg, #111 0%, var(--dark-bg) 100%);
    }

    [data-theme="light"] .faq-section {
      background: linear-gradient(135deg, #e9ecef 0%, var(--dark-bg) 100%);
    }

    .faq-item {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 15px;
      margin-bottom: 1rem;
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .faq-item:hover {
      border-color: rgba(102, 126, 234, 0.3);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }

    .faq-item summary {
      padding: 1.5rem;
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      list-style: none;
      position: relative;
      transition: all 0.3s ease;
    }

    .faq-item summary::after {
      content: '+';
      position: absolute;
      right: 1.5rem;
      top: 50%;
      transform: translateY(-50%);
      font-size: 1.2rem;
      font-weight: 300;
      transition: transform 0.3s ease;
    }

    .faq-item[open] summary::after {
      transform: translateY(-50%) rotate(45deg);
    }

    .faq-item[open] summary {
      background: rgba(102, 126, 234, 0.1);
      color: var(--text-primary);
    }

    .faq-item p {
      padding: 0 1.5rem 1.5rem;
      color: var(--text-secondary);
      line-height: 1.6;
      animation: slideDownFade 0.3s ease-out;
    }

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

    /* Contact Section */
    .contact-section {
      padding: 4rem 0;
      background: linear-gradient(135deg, var(--dark-bg) 0%, #1a1a2e 100%);
    }

    [data-theme="light"] .contact-section {
      background: linear-gradient(135deg, var(--dark-bg) 0%, #e9ecef 100%);
    }

    .contact-form {
      background: var(--card-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 20px;
      padding: 3rem;
      max-width: 600px;
      margin: 0 auto;
    }

    .form-control {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--glass-border);
      border-radius: 10px;
      padding: 0.8rem;
      color: var(--text-primary);
      font-size: 1rem;
      transition: all 0.3s ease;
    }

    [data-theme="light"] .form-control {
      background: rgba(0, 0, 0, 0.05);
    }

    .form-control:focus {
      background: rgba(255, 255, 255, 0.08);
      border-color: rgba(102, 126, 234, 0.5);
      box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
      color: var(--text-primary);
    }

    [data-theme="light"] .form-control:focus {
      background: rgba(0, 0, 0, 0.08);
    }

    .form-control::placeholder {
      color: rgba(255, 255, 255, 0.5);
    }

    [data-theme="light"] .form-control::placeholder {
      color: rgba(0, 0, 0, 0.5);
    }

  
    .social-links {
      display: flex;
      justify-content: center;
      gap: 1.5rem;
      margin-bottom: 2rem;
    }

    .social-links a {
      color: var(--text-secondary);
      font-size: 1.5rem;
      transition: all 0.3s ease;
    }

    .social-links a:hover {
      color: #667eea;
      transform: translateY(-3px);
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .navbar {
        padding: 0.5rem 0;
      }

      .navbar-brand img {
        height: 35px;
      }

      .hero-section {
        padding-top: 80px;
        min-height: calc(100vh - 80px);
      }

      .hero-stats {
        flex-direction: column;
        gap: 1rem;
      }

      .cta-buttons {
        flex-direction: column;
        align-items: center;
      }

      .btn-primary-gradient,
      .btn-ghost {
        width: 100%;
        max-width: 280px;
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
      }

      .hero-image-container {
        margin-top: 2rem;
      }

      .feature-card,
      .step-card,
      .credit-card {
        margin-bottom: 1.5rem;
      }

      .contact-form {
        padding: 2rem;
        margin: 0 1rem;
      }

      .section-title {
        font-size: 2rem;
        margin-bottom: 2rem;
      }

      .hero-title {
        font-size: 2.2rem;
        line-height: 1.2;
      }

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

  
      .social-links {
        gap: 1rem;
      }

      .floating-element {
        display: none;
      }
    }

    @media (max-width: 576px) {
      .hero-section {
        padding-top: 90px;
      }

      .hero-title {
        font-size: 1.8rem;
      }

      .section-title {
        font-size: 1.6rem;
      }

      .contact-form {
        padding: 1.5rem;
      }
    }

    /* Animations */
    .animate-on-scroll {
      opacity: 0;
      transform: translateY(30px);
      transition: all 0.6s ease;
    }

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

    /* Light/Dark mode transition */
    * {
      transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    }