:root {
    --bg-color: #0d0d0d;
    --text-color: #e0e0e0;
    --accent-color: #00ff88;
  }
  
  * {
    box-sizing: border-box;
  }
  
  body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Fira Code', monospace;
    margin: 0;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  }
  
  header {
    background-color: #111;
    padding: 1rem 2rem;
    border-bottom: 2px solid var(--accent-color);
  }
  
  header h1 {
    margin: 0;
    font-size: 2rem;
    color: var(--accent-color);
  }
  
  nav {
    background-color: #1a1a1a;
    padding: 1rem 2rem;
  }
  
  nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  nav ul li a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
  }
  
  main {
    padding: 2rem;
    max-width: 900px;
    margin: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
  }
  
  h2 {
    color: var(--accent-color);
    margin-bottom: 1rem;
  }
  
  .explore-topics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    width: 100%;
    max-width: 800px;
    margin-top: 2rem;
  }
  
  .explore-topics a {
    display: block;
    background-color: #111;
    padding: 1rem;
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    color: var(--accent-color);
    text-decoration: none;
    transition: background-color 0.2s;
  }
  
  .explore-topics a:hover {
    background-color: #222;
  }
  
  pre {
    background-color: #111;
    padding: 1rem;
    overflow-x: auto;
    border-left: 4px solid var(--accent-color);
  }
  
  code {
    color: var(--accent-color);
  }
  
  footer {
    text-align: center;
    padding: 1rem;
    background-color: #111;
    border-top: 2px solid var(--accent-color);
    color: #555;
    margin-top: auto;
  }
  
  ul li a:hover {
    text-decoration: underline;
    color: #66ffcc;
  }
  
  section {
    margin-bottom: 2rem;
  }