:root {
    --primary-color: #0066ff;
    --secondary-color: #ff6600;
    --accent-color: #00cc99;
    --bg-color: #f8f9fa;
    --text-color: #333;
    --light-text: #fff;
    --card-bg: #fff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
  }

  @font-face {
    font-family: 'Roboto';
    src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding-top: 80px;
    overflow-x: hidden;
  }

  .header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--light-text);
    padding: 20px;
    text-align: center;
    z-index: 1000;
    box-shadow: var(--shadow);
  }

  .header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }

  .header p {
    opacity: 0.9;
    font-size: 0.9rem;
  }

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

  article {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 40px;
    margin-bottom: 40px;
  }

  h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  }

  h3 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin: 30px 0 15px;
  }

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

  span {
    color: var(--primary-color);
    font-weight: 500;
  }

  strong {
    color: var(--secondary-color);
  }

  pre {
    background: #2d2d2d;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow: auto;
  }

  code {
    color: #f8f8f2;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
  }

  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: var(--card-bg);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    overflow: hidden;
  }

  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
  }

  th {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: var(--light-text);
    font-weight: 500;
  }

  tr:hover {
    background-color: rgba(0, 102, 255, 0.05);
  }

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

  .image-card {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .image-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  }

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

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

  .nav-links {
    display: flex;
    justify-content: center;
    margin: 30px 0;
    flex-wrap: wrap;
  }

  .nav-link {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: var(--light-text);
    padding: 12px 25px;
    margin: 5px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

  .nav-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
  }

  .reference {
    background: rgba(0, 102, 255, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
  }

  @media (max-width: 768px) {
    .container {
      padding: 15px;
    }
    
    article {
      padding: 25px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    h3 {
      font-size: 1.3rem;
    }
  }

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

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