:root {
    --primary: #1e3c72;
    --secondary: #2a5298;
    --accent: #ff9800;
    --text: #ffffff;
    --bg-dark: #0a192f;
    --bg-light: rgba(255, 255, 255, 0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

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

  body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
  }

  .header {
    text-align: center;
    padding: 2rem;
    background: rgba(10, 25, 47, 0.8);
    margin-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  }

  .notice {
    background: var(--accent);
    color: #000;
    padding: 1rem;
    text-align: center;
    font-weight: bold;
    margin-bottom: 2rem;
    border-radius: 5px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }

  article {
    background: rgba(10, 25, 47, 0.7);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin-bottom: 3rem;
  }

  article h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--accent);
    position: relative;
    padding-bottom: 0.5rem;
  }

  article h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
  }

  article h3 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: #fff;
  }

  article p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
  }

  .image-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }

  .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 .caption {
    padding: 1rem;
    text-align: center;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 2rem 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
  }

  code {
    background: rgba(0, 0, 0, 0.2);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: #f8f8f2;
  }

  .nav {
    position: sticky;
    top: 0;
    background: rgba(10, 25, 47, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 2rem;
    display: flex;
    justify-content: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav a {
    color: var(--text);
    text-decoration: none;
    margin: 0 1rem;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: var(--transition);
    font-weight: 500;
  }

  .nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent);
  }

  .footer {
    text-align: center;
    padding: 2rem;
    background: rgba(10, 25, 47, 0.8);
    margin-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
  }

  @media (max-width: 768px) {
    .container {
      padding: 0 1rem;
    }
    
    article {
      padding: 2rem 1rem;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
    
    .nav {
      flex-wrap: wrap;
      padding: 0.5rem;
    }
    
    .nav a {
      margin: 0.25rem;
      padding: 0.5rem;
      font-size: 0.9rem;
    }
  }

  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .fade-in {
    animation: fadeIn 1s ease-out forwards;
  }

  .delay-1 { animation-delay: 0.2s; }
  .delay-2 { animation-delay: 0.4s; }
  .delay-3 { animation-delay: 0.6s; }