:root {
    --primary: #0D1B2A;
    --secondary: #1B263B;
    --accent: #00FFFF;
    --highlight: #7FFFD4;
    --text: #E0E1DD;
    --metal: linear-gradient(135deg, #B0C4DE, #4682B4);
  }

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

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

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

  .header {
    text-align: center;
    padding: 30px 0;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
  }

  .header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    background: linear-gradient(45deg, var(--accent), var(--highlight));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0, 255, 255, 0.3);
  }

  .header p {
    color: var(--highlight);
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
  }

  .reference {
    background: rgba(0, 255, 255, 0.1);
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    margin: 20px auto;
    max-width: 600px;
    border: 1px solid var(--accent);
    font-size: 0.9rem;
  }

  .navbar {
    position: sticky;
    top: 0;
    background-color: var(--secondary);
    display: flex;
    justify-content: center;
    padding: 15px 0;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.5);
    z-index: 1000;
  }

  .nav-link {
    color: var(--text);
    text-decoration: none;
    padding: 8px 20px;
    margin: 0 10px;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 500;
  }

  .nav-link:hover {
    background: rgba(0, 255, 255, 0.2);
    color: var(--accent);
  }

  article {
    padding: 40px 0;
  }

  article h2 {
    font-size: 2rem;
    margin: 30px 0 20px;
    color: var(--accent);
    position: relative;
    padding-left: 20px;
  }

  article h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 70%;
    width: 5px;
    background: var(--metal);
    border-radius: 5px;
  }

  article h3 {
    font-size: 1.5rem;
    margin: 25px 0 15px;
    color: var(--highlight);
  }

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

  .content-block {
    background-color: rgba(27, 38, 59, 0.5);
    border-radius: 10px;
    padding: 30px;
    margin: 30px 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(0, 255, 255, 0.1);
  }

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

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

  .image-card:hover {
    transform: translateY(-5px);
  }

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

  pre {
    background-color: #1E2A38;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
    border-left: 4px solid var(--accent);
  }

  code {
    font-family: 'Courier New', monospace;
    color: var(--highlight);
  }

  .language-css {
    color: #E0E1DD;
  }

  .language-css .token.property {
    color: #7FFFD4;
  }

  .language-css .token.selector {
    color: #00FFFF;
  }

  .language-css .token.punctuation {
    color: #E0E1DD;
  }

  .footer {
    background-color: var(--secondary);
    padding: 30px 0;
    text-align: center;
    margin-top: 50px;
    border-top: 1px solid rgba(0, 255, 255, 0.2);
  }

  @media (max-width: 768px) {
    .navbar {
      flex-wrap: wrap;
    }
    
    .nav-link {
      margin: 5px;
      padding: 8px 15px;
    }
    
    article h2 {
      font-size: 1.8rem;
    }
    
    article h3 {
      font-size: 1.3rem;
    }
    
    .content-block {
      padding: 20px;
    }
  }

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

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

  /* Scroll indicator */
  .scroll-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--metal);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s;
  }

  .scroll-indicator.visible {
    opacity: 1;
  }

  .scroll-indicator::after {
    content: '↑';
    color: white;
    font-size: 20px;
  }