:root {
    --text: #111;
    --muted: #555;
    --link: #0066cc;
    --border: #e6e6e6;
    --panel: #f7f7f7;
  }
  
  * { box-sizing: border-box; }
  
  body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    margin: 0;
    line-height: 1.6;
  }
  
  .container {
    max-width: 760px;
    margin: 0 auto;
    padding: 2.5rem 1.25rem 3.5rem;
  }
  
  header.site-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1.25rem;
  }
  
  .brand {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    flex-wrap: wrap;
  }
  
  .brand a {
    color: var(--text);
    text-decoration: none;
  }
  
  .brand a:hover {
    text-decoration: underline;
  }
  
  .brand h1 {
    font-size: 2rem;
    margin: 0;
  }
  
  .tagline {
    font-style: italic;
    color: var(--muted);
    margin: 0.35rem 0 0;
  }
  
  nav.site-nav {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
  }
  
  nav.site-nav a {
    color: var(--link);
    text-decoration: none;
    padding: 0.25rem 0;
  }
  
  nav.site-nav a:hover {
    text-decoration: underline;
  }
  
  main h1.page-title {
    font-size: 2.4rem;
    margin: 0 0 0.25rem 0;
  }
  
  .subtle {
    color: var(--muted);
    font-style: italic;
    margin: 0 0 1.75rem 0;
  }
  
  a {
    color: var(--link);
    text-decoration: none;
  }
  
  a:hover { text-decoration: underline; }
  
  p { margin: 1rem 0; }
  
  ul {
    margin: 0.75rem 0 1.25rem 1.25rem;
  }
  
  li { margin: 0.45rem 0; }
  
  .note {
    background: var(--panel);
    padding: 1rem 1.25rem;
    border-left: 4px solid #ddd;
    margin: 1.75rem 0;
  }
  
  .card {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.1rem 1.25rem;
    margin: 1rem 0;
  }
  
  .card h2 {
    font-size: 1.25rem;
    margin: 0 0 0.35rem 0;
  }
  
  .card p {
    margin: 0.5rem 0;
  }
  
  hr.sep {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
  }
  
  footer.site-footer {
    border-top: 1px solid var(--border);
    margin-top: 3rem;
    padding-top: 1.25rem;
    color: #666;
    font-size: 0.95rem;
  }