:root {
    --bg: #f8f9fa;
    --fg: #212529;
    --card-bg: #ffffff;
    --dim: #6c757d;
    --accent: #343a40;
    --link: #0d6efd;
    --border: #dee2e6;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    background: var(--bg);
    color: var(--fg);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    padding: 20px;
    max-width: 900px;
    margin: auto;
  }
  
  header {
    text-align: center;
    margin-bottom: 50px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border);
  }
  
  header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--accent);
  }
  
  nav {
    margin-top: 15px;
  }
  
  nav a {
    margin: 0 15px;
    text-decoration: none;
    color: var(--link);
    font-weight: 600;
    font-size: 1rem;
  }
  
  nav a:hover {
    text-decoration: underline;
  }
  
  section {
    margin-bottom: 60px;
  }
  
  .card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.04);
    transition: transform 0.2s, box-shadow 0.2s;
  }
  
  .card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 18px rgba(0,0,0,0.1);
  }
  
  .card h3 {
    font-size: 1.4rem;
    color: var(--accent);
    margin-bottom: 10px;
  }
  
  .card p {
    color: var(--fg);
  }
  
  blockquote {
    background: var(--card-bg);
    border-left: 5px solid var(--link);
    padding: 20px;
    font-style: italic;
    margin-top: 20px;
    border-radius: 5px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }
  
  blockquote footer {
    margin-top: 10px;
    color: var(--dim);
    font-size: 0.9em;
    text-align: right;
  }
  
  footer {
    text-align: center;
    font-size: 0.85rem;
    color: var(--dim);
    margin-top: 80px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
  }