:root {
    --main-color: #003366;
    --secondary-color: #004d40;
    --accent-color: #ff9800;
    --text-light: #f5f5f5;
    --text-dark: #333333;
    --bg-gradient: linear-gradient(135deg, var(--main-color) 0%, var(--secondary-color) 100%);
  }

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

  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-gradient);
    background-attachment: fixed;
    overflow-x: hidden;
  }

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

  .header {
    text-align: center;
    padding: 40px 0;
    position: relative;
  }

  .header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 3px;
    background: var(--accent-color);
    border-radius: 3px;
  }

  h1, h2, h3, h4 {
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-light);
  }

  h1 {
    font-size: 2.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(to right, var(--accent-color), var(--text-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  h2 {
    font-size: 1.8rem;
    position: relative;
    padding-bottom: 10px;
  }

  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--accent-color);
  }

  h3 {
    font-size: 1.5rem;
    margin-top: 30px;
  }

  p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--text-light);
  }

  .content-block {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .content-block:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
  }

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

  .image-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
  }

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

  .image-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
  }

  pre {
    background: rgba(0, 0, 0, 0.3);
    border-left: 4px solid var(--accent-color);
    border-radius: 5px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    color: var(--text-light);
  }

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

  .note {
    background: rgba(255, 152, 0, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 15px;
    margin: 20px 0;
    border-radius: 0 5px 5px 0;
  }

  .footer-note {
    text-align: center;
    padding: 20px;
    margin-top: 50px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
  }

  @media (max-width: 768px) {
    .container {
      padding: 15px;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    .content-block {
      padding: 20px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }

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

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

  /* Navigation */
  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 30px 0;
    gap: 15px;
  }

  .nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
  }

  .nav-link:hover {
    background: var(--accent-color);
    color: var(--text-dark);
    transform: translateY(-3px);
  }