body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    margin: 0;
    background: #f5f7fb;
    color: #222;
  }
  
  header {
    background: #003a63; /* UMaine blue-ish */
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  header h1 {
    margin: 0;
    font-size: 1.4rem;
  }
  
  nav a {
    color: white;
    margin-left: 1rem;
    text-decoration: none;
    font-weight: 500;
  }
  
  nav a:hover {
    text-decoration: underline;
  }
  
  main {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
  }
  
  .hero {
    background: white;
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    margin-bottom: 2rem;
  }
  
  .hero h2 {
    margin-top: 0;
  }
  
  .pdf-list {
    display: grid;
    gap: 1rem;
  }
  
  .pdf-card {
    background: white;
    padding: 1rem;
    border-radius: 0.75rem;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  }
  
  .pdf-card h3 {
    margin-top: 0;
  }
  
  .pdf-card a {
    display: inline-block;
    margin-top: 0.5rem;
    text-decoration: none;
    font-weight: 600;
  }
  
  .pdf-card a:hover {
    text-decoration: underline;
  }
  
  footer {
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: #555;
  }