: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;
    }

    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);
      opacity: 0.05;
      z-index: -1;
    }

    /* 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;
      background: var(--gradient-primary);
    }

    .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;
    }

    /* Main Container */
    .main-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 5rem 2rem;
    }

    /* Section Styling */
    .section {
      margin-bottom: 5rem;
    }

    .section-header {
      text-align: center;
      margin-bottom: 3rem;
    }

    .section-header h2 {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 1rem;
    }

    .section-header p {
      font-size: 1.1rem;
      color: #666;
      max-width: 600px;
      margin: 0 auto;
    }

    /* Content Cards */
    .content-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
      gap: 2rem;
      margin-bottom: 3rem;
    }

    .content-card {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      padding: 2.5rem;
      border-radius: 20px;
      box-shadow: var(--shadow-medium);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

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

    .content-card:hover {
      transform: translateY(-10px);
      box-shadow: var(--shadow-strong);
    }

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

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

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

    /* Hackathon Section */
    .hackathon-section {
      background: var(--gradient-secondary);
      color: white;
      padding: 4rem 2rem;
      border-radius: 20px;
      margin: 3rem 0;
      text-align: center;
    }

    .hackathon-section h2 {
      font-size: 2.5rem;
      margin-bottom: 1.5rem;
    }

    .hackathon-section p {
      font-size: 1.2rem;
      opacity: 0.9;
      max-width: 800px;
      margin: 0 auto;
    }

    /* Stats Section */
    .stats-section {
      background: var(--gradient-primary);
      color: white;
      padding: 4rem 2rem;
      border-radius: 20px;
      margin: 3rem 0;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 2rem;
      text-align: center;
    }

    .stat-item h3 {
      font-size: 3rem;
      font-weight: 800;
      margin-bottom: 0.5rem;
    }

    .stat-item p {
      font-size: 1.1rem;
      opacity: 0.9;
    }

    /* CTA Section */
    .cta-section {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      padding: 3rem;
      border-radius: 20px;
      text-align: center;
      margin: 3rem 0;
      box-shadow: var(--shadow-medium);
    }

    .cta-section h3 {
      font-size: 2rem;
      margin-bottom: 1rem;
      color: var(--text-dark);
    }

    .cta-section p {
      font-size: 1.1rem;
      margin-bottom: 2rem;
      color: #666;
    }

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

    .cta-button:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-strong);
    }

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

      .nav-links {
        gap: 1rem;
      }

      .main-container {
        padding: 3rem 1rem;
      }

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

      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .section {
        margin-bottom: 3rem;
      }
    }

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