:root {
    --bg: #ffffff;
    --card: #f9f9f9;
    --text: #111111;
    --muted: #666666;
    --link: #0066cc;
    --accent: #007878;
  }
  
  * {
    box-sizing: border-box;
  }
  
  html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, system-ui, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
  }
  
  a {
    color: var(--link);
    text-decoration: none;
  }
  a:hover {
    opacity: .9;
    text-decoration: underline;
  }
  
  .container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 28px;
  }
  
  .header {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 24px;
  }
  
  .badge {
    font-size: 12px;
    padding: 4px 8px;
    border: 1px solid #cccccc;
    border-radius: 999px;
    color: var(--muted);
    background: #f1f1f1;
  }
  
  .card {
    background: var(--card);
    border: 1px solid #dddddd;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    margin-bottom: 22px;
  }
  
  .cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
  }
  
  .cardLink {
    display: block;
    background: #f2f7fa;
    border: 1px solid #d0dbe5;
    border-radius: 16px;
    padding: 16px;
    text-decoration: none;
  }
  
  .cardLink h3 {
    margin: 6px 0 8px;
    font-size: 18px;
    color: #222;
  }
  
  .knum {
    font-size: 12px;
    color: var(--accent);
    letter-spacing: .12em;
    text-transform: uppercase;
  }
  
  .teaser {
    color: var(--muted);
    font-size: 14px;
  }
  
  .nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 10px 0 22px;
  }
  
  h1 {
    font-size: 28px;
    margin: 8px 0 12px;
  }
  h2 {
    margin-top: 22px;
  }
  h3 {
    margin-top: 18px;
  }
  
  footer {
    margin-top: 40px;
    color: var(--muted);
    font-size: 13px;
  }
  
  .note {
    color: var(--muted);
    font-size: 14px;
  }
  
  hr {
    border: 0;
    border-top: 1px solid #dddddd;
    margin: 22px 0;
  }
  
  code, pre {
    background: #f2f2f2;
    border: 1px solid #dddddd;
    border-radius: 10px;
  }
  
  pre {
    padding: 14px;
    overflow: auto;
  }
  
  code {
    padding: 2px 6px;
  }
  
  .kicker {
    color: var(--accent);
    font-weight: 600;
    font-size: 12px;
    letter-spacing: .12em;
    text-transform: uppercase;
  }
  
  .toc {
    background: #f7f7f7;
    border: 1px dashed #cccccc;
    border-radius: 12px;
    padding: 12px;
    margin: 12px 0;
  }
  
  .toc a {
    display: block;
    margin: 4px 0;
  }