/* =========================
   TOC (Table of Contents)
========================= */
.toc {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: 24px;
    height: fit-content;
    border-left: 1px solid var(--border-color);
    padding-left: 16px;
  }
  
  .toc h3 {
    margin-top: 0;
    font-size: 0.95rem;
  }
  
  .toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .toc-item + .toc-item {
    margin-top: 8px;
  }
  
  .toc-link {
    font-size: 0.85rem;
    color: var(--muted-text);
  }
  
  .toc-link:hover {
    color: var(--primary-color);
  }
  
  /* =========================
     Anchor Offset (헤더 가림 방지)
  ========================= */
  article h2[id] {
    scroll-margin-top: 80px;
  }
  
  /* =========================
     Mobile: TOC 숨김
  ========================= */
  @media (max-width: 768px) {
    .toc {
      display: none;
    }
  }