@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap');
  
  :root {
    --primary: #121212;
    --secondary: #1E1E1E;
    --accent: linear-gradient(45deg, #4285F4, #673AB7);
    --text: #FFFFFF;
    --highlight: #4285F4;
    --border: rgba(255,255,255,0.1);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--primary);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  /* Header Styles */
  header {
    background: linear-gradient(135deg, #000000 0%, #121212 100%);
    padding: 30px 0;
    position: relative;
    overflow: hidden;
  }
  
  header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(66,133,244,0.1) 0%, transparent 70%);
    z-index: 0;
  }
  
  .header-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 40px 0;
  }
  
  .header-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: var(--accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: fadeIn 1.5s ease;
  }
  
  .header-subtitle {
    font-size: 1.2rem;
    max-width: 800px;
    margin-bottom: 30px;
    opacity: 0.9;
  }
  
  .reference-banner {
    background: rgba(30,30,30,0.7);
    padding: 15px 25px;
    border-radius: 50px;
    font-size: 0.9rem;
    margin-top: 20px;
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
  }
  
  /* Navigation */
  .nav-container {
    background-color: rgba(0,0,0,0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
  }
  
  nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
  }
  
  .nav-links {
    display: flex;
    gap: 25px;
  }
  
  .nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 5px 0;
  }
  
  .nav-link:hover {
    color: var(--highlight);
  }
  
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
  }
  
  .nav-link:hover::after {
    width: 100%;
  }
  
  /* Main Content */
  main {
    padding: 60px 0;
  }
  
  article {
    background-color: var(--secondary);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    margin-bottom: 50px;
  }
  
  article h2 {
    font-size: 1.8rem;
    margin: 30px 0 20px;
    background: var(--accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  
  article h3 {
    font-size: 1.4rem;
    margin: 25px 0 15px;
    color: var(--highlight);
  }
  
  article p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.7;
  }
  
  article strong {
    color: var(--highlight);
  }
  
  /* Code Blocks */
  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    border-left: 4px solid var(--highlight);
  }
  
  code {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    color: #f8f8f2;
  }
  
  /* Image Gallery */
  .image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin: 40px 0;
  }
  
  .gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(66,133,244,0.2);
  }
  
  .gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
  }
  
  .gallery-item:hover img {
    transform: scale(1.05);
  }
  
  /* Animations */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .fade-in {
    animation: fadeIn 1s ease forwards;
  }
  
  /* Responsive Design */
  @media (max-width: 768px) {
    .header-title {
      font-size: 2rem;
    }
    
    .header-subtitle {
      font-size: 1rem;
    }
    
    .nav-links {
      gap: 15px;
    }
    
    article {
      padding: 30px 20px;
    }
    
    article h2 {
      font-size: 1.5rem;
    }
    
    article h3 {
      font-size: 1.2rem;
    }
    
    .image-gallery {
      grid-template-columns: 1fr;
    }
  }
  
  /* Floating Decorations */
  .floating-circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.15;
    z-index: 0;
  }
  
  .circle-1 {
    width: 300px;
    height: 300px;
    background: #4285F4;
    top: -150px;
    right: -150px;
  }
  
  .circle-2 {
    width: 400px;
    height: 400px;
    background: #673AB7;
    bottom: -200px;
    left: -200px;
  }