.doc-shell {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 20px;
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 24px;
  }
  .doc-toc {
    position: sticky;
    top: 80px;
    align-self: start;
    background: var(--ios-surface);
    border: 1px solid var(--ios-border);
    border-radius: 10px;
    padding: 14px;
  }
  .doc-toc h3 {
    margin: 0 0 10px;
    font-size: 13px;
    color: var(--ios-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }
  .doc-toc a {
    display: block;
    padding: 4px 0;
    color: var(--ios-text);
    text-decoration: none;
    font-size: 13px;
  }
  .doc-toc a:hover {
    color: var(--ios-accent);
  }
  .doc-content {
    min-width: 0;
  }
  .doc-section {
    background: var(--ios-surface);
    border: 1px solid var(--ios-border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 16px;
  }
  .doc-section h2 {
    margin: 0 0 14px;
    font-size: 17px;
  }
  .doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
  }
  .doc-card {
    background: var(--ios-surface-muted);
    border: 1px solid var(--ios-border);
    border-radius: 8px;
    padding: 14px;
  }
  .doc-card h3 {
    margin: 0 0 8px;
    font-size: 14px;
  }
  .doc-code {
    background: rgba(16, 32, 51, 0.04);
    border: 1px solid var(--ios-border);
    border-radius: 6px;
    padding: 10px 12px;
    font-family: var(--ios-font-mono, monospace);
    font-size: 13px;
    overflow-x: auto;
  }
  .summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
  }
  @media (max-width: 768px) {
    .doc-shell {
      grid-template-columns: 1fr;
    }
    .doc-toc {
      position: static;
    }
  }