:root {
    --primary-dark: #2e8b57;
    --primary-light: #556b2f;
    --secondary: #f0e68c;
    --accent: #4682b4;
    --text-dark: #333;
    --text-light: #f5f5dc;
    --border-vintage: #8b4513;
    --bg-light: #fff8dc;
    --bg-dark: #deb887;
  }

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

  body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, var(--bg-light), var(--bg-dark));
    background-attachment: fixed;
    padding: 0;
    margin: 0;
  }

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

  .header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    color: var(--secondary);
    padding: 30px 0;
    text-align: center;
    margin-bottom: 40px;
    border-bottom: 5px double var(--border-vintage);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  }

  .header h1 {
    font-family: 'Roboto Slab', serif;
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  }

  .header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
  }

  .design-reference {
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px;
    text-align: center;
    font-size: 0.9rem;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
  }

  article {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-vintage);
  }

  article h2 {
    color: var(--primary-dark);
    font-family: 'Roboto Slab', serif;
    font-size: 2rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px dashed var(--border-vintage);
  }

  article h3 {
    color: var(--primary-light);
    font-size: 1.5rem;
    margin: 30px 0 15px;
    font-family: 'Roboto Slab', serif;
  }

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

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

  .image-card {
    background: white;
    border-radius: 10px;
    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;
    border-radius: 10px 10px 0 0;
  }

  .image-card p {
    padding: 15px;
    text-align: center;
    color: var(--text-dark);
  }

  pre {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 20px 0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    border-left: 5px solid var(--accent);
  }

  code {
    font-family: 'Courier New', monospace;
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 5px;
    border-radius: 3px;
    color: var(--primary-dark);
  }

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

  .nav-tabs a {
    color: var(--primary-dark);
    text-decoration: none;
    padding: 10px 20px;
    margin: 0 10px;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
    font-weight: bold;
    border: 2px solid var(--primary-dark);
  }

  .nav-tabs a:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-3px);
  }

  .terminal-box {
    background: #1e1e1e;
    color: #33ff33;
    padding: 20px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    margin: 20px 0;
    border: 3px double #33ff33;
    position: relative;
  }

  .terminal-box::before {
    content: 'TERMINAL';
    position: absolute;
    top: -12px;
    left: 20px;
    background: #1e1e1e;
    color: #33ff33;
    padding: 0 10px;
    font-size: 0.8rem;
  }

  @media (max-width: 768px) {
    .container {
      padding: 15px;
    }
    
    article {
      padding: 25px;
    }
    
    .header h1 {
      font-size: 2rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

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

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