:root {
    --primary: linear-gradient(135deg, #0d47a1, #6a1b9a);
    --secondary: #00e676;
    --accent: #ffea00;
    --text-light: #eceff1;
    --text-dark: #333333;
    --card-bg: #ffffff;
    --footer-bg: rgba(0,0,0,0.8);
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
  }

  body {
    background: var(--primary);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  header {
    padding: 30px 0;
    text-align: center;
    position: relative;
  }

  .header-title {
    font-family: 'Roboto', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #00e676, #ffea00);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
  }

  .header-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 30px;
  }

  .reference-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--secondary);
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
  }

  .nav-container {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
  }

  .nav-item {
    margin: 0 15px;
    padding: 10px 0;
    position: relative;
    cursor: pointer;
  }

  .nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
  }

  .nav-item:hover::after {
    width: 100%;
  }

  article {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 50px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }

  h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--accent);
    text-align: center;
  }

  h3 {
    font-size: 1.5rem;
    margin: 30px 0 20px;
    color: var(--secondary);
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }

  .image-card {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: transform 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
  }

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }

  .image-card:hover img {
    transform: scale(1.05);
  }

  pre {
    background: rgba(0,0,0,0.2);
    border-radius: 10px;
    padding: 20px;
    margin: 30px 0;
    overflow: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
  }

  pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--secondary);
    border-radius: 10px 0 0 10px;
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(0,0,0,0.2);
    padding: 2px 5px;
    border-radius: 3px;
  }

  .footer {
    background: var(--footer-bg);
    padding: 30px 0;
    text-align: center;
    margin-top: 50px;
  }

  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }

  .footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
  }

  .footer-link {
    margin: 0 15px;
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .footer-link:hover {
    color: var(--secondary);
  }

  .copyright {
    font-size: 0.9rem;
    opacity: 0.7;
  }

  @media (max-width: 768px) {
    .header-title {
      font-size: 2rem;
    }
    
    article {
      padding: 30px 20px;
    }
    
    h2 {
      font-size: 1.8rem;
    }
    
    h3 {
      font-size: 1.3rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 480px) {
    .header-title {
      font-size: 1.6rem;
    }
    
    .nav-container {
      flex-direction: column;
      align-items: center;
    }
    
    .nav-item {
      margin: 5px 0;
    }
    
    pre {
      padding: 15px;
      font-size: 0.8rem;
    }
  }

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

  .floating {
    animation: float 3s ease-in-out infinite;
  }

  .scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

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